fs/ext2/ialloc.c

   1 /*
   2  *  linux/fs/ext2/ialloc.c
   3  *
   4  * Copyright (C) 1992, 1993, 1994, 1995
   5  * Remy Card (card@masi.ibp.fr)
   6  * Laboratoire MASI - Institut Blaise Pascal
   7  * Universite Pierre et Marie Curie (Paris VI)
   8  *
   9  *  BSD ufs-inspired inode and directory allocation by
  10  *  Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  11  *  Big-endian to little-endian byte-swapping/bitmaps by
  12  *        David S. Miller (davem@caip.rutgers.edu), 1995
  13  */
  14
  15 /*
  16  * ialloc.c contains the inodes allocation and deallocation routines
  17  */
  18
  19 /*
  20  * The free inodes are managed by bitmaps.  A file system contains several
  21  * blocks groups.  Each group contains 1 bitmap block for blocks, 1 bitmap
  22  * block for inodes, N blocks for the inode table and data blocks.
  23  *
  24  * The file system contains group descriptors which are located after the
  25  * super block.  Each descriptor contains the number of the bitmap block and
  26  * the free blocks count in the block.  The descriptors are loaded in memory
  27  * when a file system is mounted (see ext2_read_super).
  28  */
  29
  30 #include <linux/fs.h>
  31 #include <linux/ext2_fs.h>
  32 #include <linux/sched.h>
  33 #include <linux/stat.h>
  34 #include <linux/string.h>
  35 #include <linux/locks.h>
  36 #include <linux/quotaops.h>
  37
  38 #include <asm/bitops.h>
  39 #include <asm/byteorder.h>
  40
  41 /*
  42  * Read the inode allocation bitmap for a given block_group, reading
  43  * into the specified slot in the superblock's bitmap cache.
  44  *
  45  * Return >=0 on success or a -ve error code.
  46  */
  47 static int read_inode_bitmap (struct super_block * sb,
  48                                unsigned long block_group,
  49                                unsigned int bitmap_nr)
  50 {
  51         struct ext2_group_desc * gdp;
  52         struct buffer_head * bh = NULL;
  53         int retval = 0;
  54
  55         gdp = ext2_get_group_desc (sb, block_group, NULL);
  56         if (!gdp) {
  57                 retval = -EIO;
  58                 goto error_out;
  59         }
  60         bh = bread (sb->s_dev, le32_to_cpu(gdp->bg_inode_bitmap), sb->s_blocksize);
  61         if (!bh) {
  62                 ext2_error (sb, "read_inode_bitmap",
  63                             "Cannot read inode bitmap - "
  64                             "block_group = %lu, inode_bitmap = %lu",
  65                             block_group, (unsigned long) gdp->bg_inode_bitmap);
  66                 retval = -EIO;
  67         }
  68         /*
  69          * On IO error, just leave a zero in the superblock's block pointer for
  70          * this group.  The IO will be retried next time.
  71          */
  72 error_out:
  73         sb->u.ext2_sb.s_inode_bitmap_number[bitmap_nr] = block_group;
  74         sb->u.ext2_sb.s_inode_bitmap[bitmap_nr] = bh;
  75         return retval;
  76 }
  77
  78 /*
  79  * load_inode_bitmap loads the inode bitmap for a blocks group
  80  *
  81  * It maintains a cache for the last bitmaps loaded.  This cache is managed
  82  * with a LRU algorithm.
  83  *
  84  * Notes:
  85  * 1/ There is one cache per mounted file system.
  86  * 2/ If the file system contains less than EXT2_MAX_GROUP_LOADED groups,
  87  *    this function reads the bitmap without maintaining a LRU cache.
  88  *
  89  * Return the slot used to store the bitmap, or a -ve error code.
  90  */
  91 static int load_inode_bitmap (struct super_block * sb,
  92                               unsigned int block_group)
  93 {
  94         int i, j, retval = 0;
  95         unsigned long inode_bitmap_number;
  96         struct buffer_head * inode_bitmap;
  97
  98         if (block_group >= sb->u.ext2_sb.s_groups_count)
  99                 ext2_panic (sb, "load_inode_bitmap",
 100                             "block_group >= groups_count - "
 101                             "block_group = %d, groups_count = %lu",
 102                              block_group, sb->u.ext2_sb.s_groups_count);
 103         if (sb->u.ext2_sb.s_loaded_inode_bitmaps > 0 &&
 104             sb->u.ext2_sb.s_inode_bitmap_number[0] == block_group &&
 105             sb->u.ext2_sb.s_inode_bitmap[0] != NULL)
 106                 return 0;
 107         if (sb->u.ext2_sb.s_groups_count <= EXT2_MAX_GROUP_LOADED) {
 108                 if (sb->u.ext2_sb.s_inode_bitmap[block_group]) {
 109                         if (sb->u.ext2_sb.s_inode_bitmap_number[block_group] != block_group)
 110                                 ext2_panic (sb, "load_inode_bitmap",
 111                                             "block_group != inode_bitmap_number");
 112                         else
 113                                 return block_group;
 114                 } else {
 115                         retval = read_inode_bitmap (sb, block_group,
 116                                                     block_group);
 117                         if (retval < 0)
 118                                 return retval;
 119                         return block_group;
 120                 }
 121         }
 122
 123         for (i = 0; i < sb->u.ext2_sb.s_loaded_inode_bitmaps &&
 124                     sb->u.ext2_sb.s_inode_bitmap_number[i] != block_group;
 125              i++)
 126                 ;
 127         if (i < sb->u.ext2_sb.s_loaded_inode_bitmaps &&
 128             sb->u.ext2_sb.s_inode_bitmap_number[i] == block_group) {
 129                 inode_bitmap_number = sb->u.ext2_sb.s_inode_bitmap_number[i];
 130                 inode_bitmap = sb->u.ext2_sb.s_inode_bitmap[i];
 131                 for (j = i; j > 0; j--) {
 132                         sb->u.ext2_sb.s_inode_bitmap_number[j] =
 133                                 sb->u.ext2_sb.s_inode_bitmap_number[j - 1];
 134                         sb->u.ext2_sb.s_inode_bitmap[j] =
 135                                 sb->u.ext2_sb.s_inode_bitmap[j - 1];
 136                 }
 137                 sb->u.ext2_sb.s_inode_bitmap_number[0] = inode_bitmap_number;
 138                 sb->u.ext2_sb.s_inode_bitmap[0] = inode_bitmap;
 139
 140                 /*
 141                  * There's still one special case here --- if inode_bitmap == 0
 142                  * then our last attempt to read the bitmap failed and we have
 143                  * just ended up caching that failure.  Try again to read it.
 144                  */
 145                 if (!inode_bitmap)
 146                         retval = read_inode_bitmap (sb, block_group, 0);
 147
 148         } else {
 149                 if (sb->u.ext2_sb.s_loaded_inode_bitmaps < EXT2_MAX_GROUP_LOADED)
 150                         sb->u.ext2_sb.s_loaded_inode_bitmaps++;
 151                 else
 152                         brelse (sb->u.ext2_sb.s_inode_bitmap[EXT2_MAX_GROUP_LOADED - 1]);
 153                 for (j = sb->u.ext2_sb.s_loaded_inode_bitmaps - 1; j > 0; j--) {
 154                         sb->u.ext2_sb.s_inode_bitmap_number[j] =
 155                                 sb->u.ext2_sb.s_inode_bitmap_number[j - 1];
 156                         sb->u.ext2_sb.s_inode_bitmap[j] =
 157                                 sb->u.ext2_sb.s_inode_bitmap[j - 1];
 158                 }
 159                 retval = read_inode_bitmap (sb, block_group, 0);
 160         }
 161         return retval;
 162 }
 163
 164 /*
 165  * NOTE! When we get the inode, we're the only people
 166  * that have access to it, and as such there are no
 167  * race conditions we have to worry about. The inode
 168  * is not on the hash-lists, and it cannot be reached
 169  * through the filesystem because the directory entry
 170  * has been deleted earlier.
 171  *
 172  * HOWEVER: we must make sure that we get no aliases,
 173  * which means that we have to call "clear_inode()"
 174  * _before_ we mark the inode not in use in the inode
 175  * bitmaps. Otherwise a newly created file might use
 176  * the same inode number (not actually the same pointer
 177  * though), and then we'd have two inodes sharing the
 178  * same inode number and space on the harddisk.
 179  */
 180 void ext2_free_inode (struct inode * inode)
 181 {
 182         int is_directory;
 183         unsigned long ino;
 184         struct super_block * sb;
 185         struct buffer_head * bh;
 186         struct buffer_head * bh2;
 187         unsigned long block_group;
 188         unsigned long bit;
 189         int bitmap_nr;
 190         struct ext2_group_desc * gdp;
 191         struct ext2_super_block * es;
 192
 193         if (!inode)
 194                 return;
 195         if (!inode->i_dev) {
 196                 printk ("ext2_free_inode: inode has no device\n");
 197                 return;
 198         }
 199         if (inode->i_count > 1) {
 200                 printk ("ext2_free_inode: inode has count=%d\n", inode->i_count);
 201                 return;
 202         }
 203         if (inode->i_nlink) {
 204                 printk ("ext2_free_inode: inode has nlink=%d\n",
 205                         inode->i_nlink);
 206                 return;
 207         }
 208         if (!inode->i_sb) {
 209                 printk("ext2_free_inode: inode on nonexistent device\n");
 210                 return;
 211         }
 212
 213         ino = inode->i_ino;
 214         ext2_debug ("freeing inode %lu\n", ino);
 215
 216         sb = inode->i_sb;
 217         lock_super (sb);
 218         if (ino < EXT2_FIRST_INO(sb) ||
 219             ino > le32_to_cpu(sb->u.ext2_sb.s_es->s_inodes_count)) {
 220                 ext2_error (sb, "free_inode",
 221                             "reserved inode or nonexistent inode");
 222                 goto error_return;
 223         }
 224         es = sb->u.ext2_sb.s_es;
 225         block_group = (ino - 1) / EXT2_INODES_PER_GROUP(sb);
 226         bit = (ino - 1) % EXT2_INODES_PER_GROUP(sb);
 227         bitmap_nr = load_inode_bitmap (sb, block_group);
 228         if (bitmap_nr < 0)
 229                 goto error_return;
 230
 231         bh = sb->u.ext2_sb.s_inode_bitmap[bitmap_nr];
 232
 233         is_directory = S_ISDIR(inode->i_mode);
 234
 235         /* Do this BEFORE marking the inode not in use */
 236         DQUOT_FREE_INODE(sb, inode);
 237         clear_inode (inode);
 238
 239         /* Ok, now we can actually update the inode bitmaps.. */
 240         if (!ext2_clear_bit (bit, bh->b_data))
 241                 ext2_warning (sb, "ext2_free_inode",
 242                               "bit already cleared for inode %lu", ino);
 243         else {
 244                 gdp = ext2_get_group_desc (sb, block_group, &bh2);
 245                 if (gdp) {
 246                         gdp->bg_free_inodes_count =
 247                                 cpu_to_le16(le16_to_cpu(gdp->bg_free_inodes_count) + 1);
 248                         if (is_directory)
 249                                 gdp->bg_used_dirs_count =
 250                                         cpu_to_le16(le16_to_cpu(gdp->bg_used_dirs_count) - 1);
 251                 }
 252                 mark_buffer_dirty(bh2, 1);
 253                 es->s_free_inodes_count =
 254                         cpu_to_le32(le32_to_cpu(es->s_free_inodes_count) + 1);
 255                 mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
 256         }
 257         mark_buffer_dirty(bh, 1);
 258         if (sb->s_flags & MS_SYNCHRONOUS) {
 259                 ll_rw_block (WRITE, 1, &bh);
 260                 wait_on_buffer (bh);
 261         }
 262         sb->s_dirt = 1;
 263 error_return:
 264         unlock_super (sb);
 265 }
 266
 267 /*
 268  * This function increments the inode version number
 269  *
 270  * This may be used one day by the NFS server
 271  */
 272 static void inc_inode_version (struct inode * inode,
 273                                struct ext2_group_desc *gdp,
 274                                int mode)
 275 {
 276         inode->u.ext2_i.i_version++;
 277         mark_inode_dirty(inode);
 278
 279         return;
 280 }
 281
 282 /*
 283  * There are two policies for allocating an inode.  If the new inode is
 284  * a directory, then a forward search is made for a block group with both
 285  * free space and a low directory-to-inode ratio; if that fails, then of
 286  * the groups with above-average free space, that group with the fewest
 287  * directories already is chosen.
 288  *
 289  * For other inodes, search forward from the parent directory\'s block
 290  * group to find a free inode.
 291  */
 292 struct inode * ext2_new_inode (const struct inode * dir, int mode, int * err)
 293 {
 294         struct super_block * sb;
 295         struct buffer_head * bh;
 296         struct buffer_head * bh2;
 297         int i, j, avefreei;
 298         struct inode * inode;
 299         int bitmap_nr;
 300         struct ext2_group_desc * gdp;
 301         struct ext2_group_desc * tmp;
 302         struct ext2_super_block * es;
 303
 304         /* Cannot create files in a deleted directory */
 305         if (!dir || !dir->i_nlink) {
 306                 *err = -EPERM;
 307                 return NULL;
 308         }
 309
 310         inode = get_empty_inode ();
 311         if (!inode) {
 312                 *err = -ENOMEM;
 313                 return NULL;
 314         }
 315
 316         sb = dir->i_sb;
 317         inode->i_sb = sb;
 318         inode->i_flags = sb->s_flags;
 319         lock_super (sb);
 320         es = sb->u.ext2_sb.s_es;
 321 repeat:
 322         gdp = NULL; i=0;
 323
 324         *err = -ENOSPC;
 325         if (S_ISDIR(mode)) {
 326                 avefreei = le32_to_cpu(es->s_free_inodes_count) /
 327                         sb->u.ext2_sb.s_groups_count;
 328 /* I am not yet convinced that this next bit is necessary.
 329                 i = dir->u.ext2_i.i_block_group;
 330                 for (j = 0; j < sb->u.ext2_sb.s_groups_count; j++) {
 331                         tmp = ext2_get_group_desc (sb, i, &bh2);
 332                         if (tmp &&
 333                             (le16_to_cpu(tmp->bg_used_dirs_count) << 8) <
 334                              le16_to_cpu(tmp->bg_free_inodes_count)) {
 335                                 gdp = tmp;
 336                                 break;
 337                         }
 338                         else
 339                         i = ++i % sb->u.ext2_sb.s_groups_count;
 340                 }
 341 */
 342                 if (!gdp) {
 343                         for (j = 0; j < sb->u.ext2_sb.s_groups_count; j++) {
 344                                 tmp = ext2_get_group_desc (sb, j, &bh2);
 345                                 if (tmp &&
 346                                     le16_to_cpu(tmp->bg_free_inodes_count) &&
 347                                     le16_to_cpu(tmp->bg_free_inodes_count) >= avefreei) {
 348                                         if (!gdp ||
 349                                             (le16_to_cpu(tmp->bg_free_blocks_count) >
 350                                              le16_to_cpu(gdp->bg_free_blocks_count))) {
 351                                                 i = j;
 352                                                 gdp = tmp;
 353                                         }
 354                                 }
 355                         }
 356                 }
 357         }
 358         else
 359         {
 360                 /*
 361                  * Try to place the inode in its parent directory
 362                  */
 363                 i = dir->u.ext2_i.i_block_group;
 364                 tmp = ext2_get_group_desc (sb, i, &bh2);
 365                 if (tmp && le16_to_cpu(tmp->bg_free_inodes_count))
 366                         gdp = tmp;
 367                 else
 368                 {
 369                         /*
 370                          * Use a quadratic hash to find a group with a
 371                          * free inode
 372                          */
 373                         for (j = 1; j < sb->u.ext2_sb.s_groups_count; j <<= 1) {
 374                                 i += j;
 375                                 if (i >= sb->u.ext2_sb.s_groups_count)
 376                                         i -= sb->u.ext2_sb.s_groups_count;
 377                                 tmp = ext2_get_group_desc (sb, i, &bh2);
 378                                 if (tmp &&
 379                                     le16_to_cpu(tmp->bg_free_inodes_count)) {
 380                                         gdp = tmp;
 381                                         break;
 382                                 }
 383                         }
 384                 }
 385                 if (!gdp) {
 386                         /*
 387                          * That failed: try linear search for a free inode
 388                          */
 389                         i = dir->u.ext2_i.i_block_group + 1;
 390                         for (j = 2; j < sb->u.ext2_sb.s_groups_count; j++) {
 391                                 if (++i >= sb->u.ext2_sb.s_groups_count)
 392                                         i = 0;
 393                                 tmp = ext2_get_group_desc (sb, i, &bh2);
 394                                 if (tmp &&
 395                                     le16_to_cpu(tmp->bg_free_inodes_count)) {
 396                                         gdp = tmp;
 397                                         break;
 398                                 }
 399                         }
 400                 }
 401         }
 402
 403         if (!gdp) {
 404                 unlock_super (sb);
 405                 iput(inode);
 406                 return NULL;
 407         }
 408         bitmap_nr = load_inode_bitmap (sb, i);
 409         if (bitmap_nr < 0) {
 410                 unlock_super (sb);
 411                 iput(inode);
 412                 *err = -EIO;
 413                 return NULL;
 414         }
 415
 416         bh = sb->u.ext2_sb.s_inode_bitmap[bitmap_nr];
 417         if ((j = ext2_find_first_zero_bit ((unsigned long *) bh->b_data,
 418                                       EXT2_INODES_PER_GROUP(sb))) <
 419             EXT2_INODES_PER_GROUP(sb)) {
 420                 if (ext2_set_bit (j, bh->b_data)) {
 421                         ext2_warning (sb, "ext2_new_inode",
 422                                       "bit already set for inode %d", j);
 423                         goto repeat;
 424                 }
 425                 mark_buffer_dirty(bh, 1);
 426                 if (sb->s_flags & MS_SYNCHRONOUS) {
 427                         ll_rw_block (WRITE, 1, &bh);
 428                         wait_on_buffer (bh);
 429                 }
 430         } else {
 431                 if (le16_to_cpu(gdp->bg_free_inodes_count) != 0) {
 432                         ext2_error (sb, "ext2_new_inode",
 433                                     "Free inodes count corrupted in group %d",
 434                                     i);
 435                         unlock_super (sb);
 436                         iput (inode);
 437                         return NULL;
 438                 }
 439                 goto repeat;
 440         }
 441         j += i * EXT2_INODES_PER_GROUP(sb) + 1;
 442         if (j < EXT2_FIRST_INO(sb) || j > le32_to_cpu(es->s_inodes_count)) {
 443                 ext2_error (sb, "ext2_new_inode",
 444                             "reserved inode or inode > inodes count - "
 445                             "block_group = %d,inode=%d", i, j);
 446                 unlock_super (sb);
 447                 iput (inode);
 448                 return NULL;
 449         }
 450         gdp->bg_free_inodes_count =
 451                 cpu_to_le16(le16_to_cpu(gdp->bg_free_inodes_count) - 1);
 452         if (S_ISDIR(mode))
 453                 gdp->bg_used_dirs_count =
 454                         cpu_to_le16(le16_to_cpu(gdp->bg_used_dirs_count) + 1);
 455         mark_buffer_dirty(bh2, 1);
 456         es->s_free_inodes_count =
 457                 cpu_to_le32(le32_to_cpu(es->s_free_inodes_count) - 1);
 458         mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
 459         sb->s_dirt = 1;
 460         inode->i_mode = mode;
 461         inode->i_sb = sb;
 462         inode->i_nlink = 1;
 463         inode->i_dev = sb->s_dev;
 464         inode->i_uid = current->fsuid;
 465         if (test_opt (sb, GRPID))
 466                 inode->i_gid = dir->i_gid;
 467         else if (dir->i_mode & S_ISGID) {
 468                 inode->i_gid = dir->i_gid;
 469                 if (S_ISDIR(mode))
 470                         mode |= S_ISGID;
 471         } else
 472                 inode->i_gid = current->fsgid;
 473
 474         inode->i_ino = j;
 475         inode->i_blksize = PAGE_SIZE;   /* This is the optimal IO size (for stat), not the fs block size */
 476         inode->i_blocks = 0;
 477         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 478         inode->u.ext2_i.i_new_inode = 1;
 479         inode->u.ext2_i.i_flags = dir->u.ext2_i.i_flags;
 480         if (S_ISLNK(mode))
 481                 inode->u.ext2_i.i_flags &= ~(EXT2_IMMUTABLE_FL | EXT2_APPEND_FL);
 482         inode->u.ext2_i.i_faddr = 0;
 483         inode->u.ext2_i.i_frag_no = 0;
 484         inode->u.ext2_i.i_frag_size = 0;
 485         inode->u.ext2_i.i_file_acl = 0;
 486         inode->u.ext2_i.i_dir_acl = 0;
 487         inode->u.ext2_i.i_dtime = 0;
 488         inode->u.ext2_i.i_block_group = i;
 489         inode->i_op = NULL;
 490         if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL)
 491                 inode->i_flags |= MS_SYNCHRONOUS;
 492         insert_inode_hash(inode);
 493         mark_inode_dirty(inode);
 494         inc_inode_version (inode, gdp, mode);
 495
 496         unlock_super (sb);
 497         if(DQUOT_ALLOC_INODE(sb, inode)) {
 498                 sb->dq_op->drop(inode);
 499                 inode->i_nlink = 0;
 500                 iput(inode);
 501                 *err = -EDQUOT;
 502                 return NULL;
 503         }
 504         ext2_debug ("allocating inode %lu\n", inode->i_ino);
 505
 506         *err = 0;
 507         return inode;
 508 }
 509
 510 unsigned long ext2_count_free_inodes (struct super_block * sb)
 511 {
 512 #ifdef EXT2FS_DEBUG
 513         struct ext2_super_block * es;
 514         unsigned long desc_count, bitmap_count, x;
 515         int bitmap_nr;
 516         struct ext2_group_desc * gdp;
 517         int i;
 518
 519         lock_super (sb);
 520         es = sb->u.ext2_sb.s_es;
 521         desc_count = 0;
 522         bitmap_count = 0;
 523         gdp = NULL;
 524         for (i = 0; i < sb->u.ext2_sb.s_groups_count; i++) {
 525                 gdp = ext2_get_group_desc (sb, i, NULL);
 526                 if (!gdp)
 527                         continue;
 528                 desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
 529                 bitmap_nr = load_inode_bitmap (sb, i);
 530                 if (bitmap_nr < 0)
 531                         continue;
 532
 533                 x = ext2_count_free (sb->u.ext2_sb.s_inode_bitmap[bitmap_nr],
 534                                      EXT2_INODES_PER_GROUP(sb) / 8);
 535                 printk ("group %d: stored = %d, counted = %lu\n",
 536                         i, le16_to_cpu(gdp->bg_free_inodes_count), x);
 537                 bitmap_count += x;
 538         }
 539         printk("ext2_count_free_inodes: stored = %lu, computed = %lu, %lu\n",
 540                 le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
 541         unlock_super (sb);
 542         return desc_count;
 543 #else
 544         return le32_to_cpu(sb->u.ext2_sb.s_es->s_free_inodes_count);
 545 #endif
 546 }
 547
 548 void ext2_check_inodes_bitmap (struct super_block * sb)
 549 {
 550         struct ext2_super_block * es;
 551         unsigned long desc_count, bitmap_count, x;
 552         int bitmap_nr;
 553         struct ext2_group_desc * gdp;
 554         int i;
 555
 556         lock_super (sb);
 557         es = sb->u.ext2_sb.s_es;
 558         desc_count = 0;
 559         bitmap_count = 0;
 560         gdp = NULL;
 561         for (i = 0; i < sb->u.ext2_sb.s_groups_count; i++) {
 562                 gdp = ext2_get_group_desc (sb, i, NULL);
 563                 if (!gdp)
 564                         continue;
 565                 desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
 566                 bitmap_nr = load_inode_bitmap (sb, i);
 567                 if (bitmap_nr < 0)
 568                         continue;
 569
 570                 x = ext2_count_free (sb->u.ext2_sb.s_inode_bitmap[bitmap_nr],
 571                                      EXT2_INODES_PER_GROUP(sb) / 8);
 572                 if (le16_to_cpu(gdp->bg_free_inodes_count) != x)
 573                         ext2_error (sb, "ext2_check_inodes_bitmap",
 574                                     "Wrong free inodes count in group %d, "
 575                                     "stored = %d, counted = %lu", i,
 576                                     le16_to_cpu(gdp->bg_free_inodes_count), x);
 577                 bitmap_count += x;
 578         }
 579         if (le32_to_cpu(es->s_free_inodes_count) != bitmap_count)
 580                 ext2_error (sb, "ext2_check_inodes_bitmap",
 581                             "Wrong free inodes count in super block, "
 582                             "stored = %lu, counted = %lu",
 583                             (unsigned long) le32_to_cpu(es->s_free_inodes_count),
 584                             bitmap_count);
 585         unlock_super (sb);
 586 }