fs/ext2/ialloc.c

/* */
This source file includes following definitions.
get_group_desc
read_inode_bitmap
load_inode_bitmap
set_inode_dtime
ext2_free_inode
inc_inode_version
ext2_new_inode
ext2_count_free_inodes
ext2_check_inodes_bitmap
   1 /*
   2  *  linux/fs/ext2/ialloc.c
   3  *
   4  *  Copyright (C) 1992, 1993, 1994  Remy Card (card@masi.ibp.fr)
   5  *                                  Laboratoire MASI - Institut Blaise Pascal
   6  *                                  Universite Pierre et Marie Curie (Paris VI)
   7  *
   8  *  BSD ufs-inspired inode and directory allocation by 
   9  *  Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
  10  */
  11 
  12 /*
  13  * ialloc.c contains the inodes allocation and deallocation routines
  14  */
  15 
  16 /*
  17  * The free inodes are managed by bitmaps.  A file system contains several
  18  * blocks groups.  Each group contains 1 bitmap block for blocks, 1 bitmap
  19  * block for inodes, N blocks for the inode table and data blocks.
  20  *
  21  * The file system contains group descriptors which are located after the
  22  * super block.  Each descriptor contains the number of the bitmap block and
  23  * the free blocks count in the block.  The descriptors are loaded in memory
  24  * when a file system is mounted (see ext2_read_super).
  25  */
  26 
  27 #include <linux/fs.h>
  28 #include <linux/ext2_fs.h>
  29 #include <linux/sched.h>
  30 #include <linux/stat.h>
  31 #include <linux/string.h>
  32 #include <linux/locks.h>
  33 
  34 #include <asm/bitops.h>
  35 
  36 static struct ext2_group_desc * get_group_desc (struct super_block * sb,
     /*  */
  37                                                 unsigned int block_group,
  38                                                 struct buffer_head ** bh)
  39 {
  40         unsigned long group_desc;
  41         unsigned long desc;
  42         struct ext2_group_desc * gdp;
  43 
  44         if (block_group >= sb->u.ext2_sb.s_groups_count)
  45                 ext2_panic (sb, "get_group_desc",
  46                             "block_group >= groups_count\n"
  47                             "block_group = %d, groups_count = %lu",
  48                             block_group, sb->u.ext2_sb.s_groups_count);
  49 
  50         group_desc = block_group / EXT2_DESC_PER_BLOCK(sb);
  51         desc = block_group % EXT2_DESC_PER_BLOCK(sb);
  52         if (!sb->u.ext2_sb.s_group_desc[group_desc])
  53                 ext2_panic (sb, "get_group_desc",
  54                             "Group descriptor not loaded\n"
  55                             "block_group = %d, group_desc = %lu, desc = %lu",
  56                              block_group, group_desc, desc);
  57         gdp = (struct ext2_group_desc *) 
  58                 sb->u.ext2_sb.s_group_desc[group_desc]->b_data;
  59         if (bh)
  60                 *bh = sb->u.ext2_sb.s_group_desc[group_desc];
  61         return gdp + desc;
  62 }
  63 
  64 static void read_inode_bitmap (struct super_block * sb,
     /*  */
  65                                unsigned long block_group,
  66                                unsigned int bitmap_nr)
  67 {
  68         struct ext2_group_desc * gdp;
  69         struct buffer_head * bh;
  70 
  71         gdp = get_group_desc (sb, block_group, NULL);
  72         bh = bread (sb->s_dev, gdp->bg_inode_bitmap, sb->s_blocksize);
  73         if (!bh)
  74                 ext2_panic (sb, "read_inode_bitmap", "Cannot read inode bitmap\n"
  75                             "block_group = %lu, inode_bitmap = %lu",
  76                             block_group, gdp->bg_inode_bitmap);
  77         sb->u.ext2_sb.s_inode_bitmap_number[bitmap_nr] = block_group;
  78         sb->u.ext2_sb.s_inode_bitmap[bitmap_nr] = bh;
  79 }
  80 
  81 /*
  82  * load_inode_bitmap loads the inode bitmap for a blocks group
  83  *
  84  * It maintains a cache for the last bitmaps loaded.  This cache is managed
  85  * with a LRU algorithm.
  86  *
  87  * Notes:
  88  * 1/ There is one cache per mounted file system.
  89  * 2/ If the file system contains less than EXT2_MAX_GROUP_LOADED groups,
  90  *    this function reads the bitmap without maintaining a LRU cache.
  91  */
  92 static int load_inode_bitmap (struct super_block * sb,
     /*  */
  93                               unsigned int block_group)
  94 {
  95         int i, j;
  96         unsigned long inode_bitmap_number;
  97         struct buffer_head * inode_bitmap;
  98 
  99         if (block_group >= sb->u.ext2_sb.s_groups_count)
 100                 ext2_panic (sb, "load_inode_bitmap",
 101                             "block_group >= groups_count\n"
 102                             "block_group = %d, groups_count = %lu",
 103                              block_group, sb->u.ext2_sb.s_groups_count);
 104         if (sb->u.ext2_sb.s_loaded_inode_bitmaps > 0 &&
 105             sb->u.ext2_sb.s_inode_bitmap_number[0] == block_group)
 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                         read_inode_bitmap (sb, block_group, block_group);
 116                         return block_group;
 117                 }
 118         }
 119 
 120         for (i = 0; i < sb->u.ext2_sb.s_loaded_inode_bitmaps &&
 121                     sb->u.ext2_sb.s_inode_bitmap_number[i] != block_group;
 122              i++)
 123                 ;
 124         if (i < sb->u.ext2_sb.s_loaded_inode_bitmaps &&
 125             sb->u.ext2_sb.s_inode_bitmap_number[i] == block_group) {
 126                 inode_bitmap_number = sb->u.ext2_sb.s_inode_bitmap_number[i];
 127                 inode_bitmap = sb->u.ext2_sb.s_inode_bitmap[i];
 128                 for (j = i; j > 0; j--) {
 129                         sb->u.ext2_sb.s_inode_bitmap_number[j] =
 130                                 sb->u.ext2_sb.s_inode_bitmap_number[j - 1];
 131                         sb->u.ext2_sb.s_inode_bitmap[j] =
 132                                 sb->u.ext2_sb.s_inode_bitmap[j - 1];
 133                 }
 134                 sb->u.ext2_sb.s_inode_bitmap_number[0] = inode_bitmap_number;
 135                 sb->u.ext2_sb.s_inode_bitmap[0] = inode_bitmap;
 136         } else {
 137                 if (sb->u.ext2_sb.s_loaded_inode_bitmaps < EXT2_MAX_GROUP_LOADED)
 138                         sb->u.ext2_sb.s_loaded_inode_bitmaps++;
 139                 else
 140                         brelse (sb->u.ext2_sb.s_inode_bitmap[EXT2_MAX_GROUP_LOADED - 1]);
 141                 for (j = sb->u.ext2_sb.s_loaded_inode_bitmaps - 1; j > 0; j--) {
 142                         sb->u.ext2_sb.s_inode_bitmap_number[j] =
 143                                 sb->u.ext2_sb.s_inode_bitmap_number[j - 1];
 144                         sb->u.ext2_sb.s_inode_bitmap[j] =
 145                                 sb->u.ext2_sb.s_inode_bitmap[j - 1];
 146                 }
 147                 read_inode_bitmap (sb, block_group, 0);
 148         }
 149         return 0;
 150 }
 151 
 152 /*
 153  * This function sets the deletion time for the inode
 154  *
 155  * This may be used one day by an 'undelete' program
 156  */
 157 static void set_inode_dtime (struct inode * inode,
     /*  */
 158                              struct ext2_group_desc * gdp)
 159 {
 160         unsigned long inode_block;
 161         struct buffer_head * bh;
 162         struct ext2_inode * raw_inode;
 163 
 164         inode_block = gdp->bg_inode_table + (((inode->i_ino - 1) %
 165                         EXT2_INODES_PER_GROUP(inode->i_sb)) /
 166                         EXT2_INODES_PER_BLOCK(inode->i_sb));
 167         bh = bread (inode->i_sb->s_dev, inode_block, inode->i_sb->s_blocksize);
 168         if (!bh)
 169                 ext2_panic (inode->i_sb, "set_inode_dtime",
 170                             "Cannot load inode table block\n"
 171                             "inode=%lu, inode_block=%lu",
 172                             inode->i_ino, inode_block);
 173         raw_inode = ((struct ext2_inode *) bh->b_data) +
 174                         (((inode->i_ino - 1) %
 175                         EXT2_INODES_PER_GROUP(inode->i_sb)) %
 176                         EXT2_INODES_PER_BLOCK(inode->i_sb));
 177         raw_inode->i_links_count = 0;
 178         raw_inode->i_dtime = CURRENT_TIME;
 179         mark_buffer_dirty(bh, 1);
 180         if (IS_SYNC(inode)) {
 181                 ll_rw_block (WRITE, 1, &bh);
 182                 wait_on_buffer (bh);
 183         }
 184         brelse (bh);
 185 }
 186 
 187 void ext2_free_inode (struct inode * inode)
     /*  */
 188 {
 189         struct super_block * sb;
 190         struct buffer_head * bh;
 191         struct buffer_head * bh2;
 192         unsigned long block_group;
 193         unsigned long bit;
 194         int bitmap_nr;
 195         struct ext2_group_desc * gdp;
 196         struct ext2_super_block * es;
 197 
 198         if (!inode)
 199                 return;
 200         if (!inode->i_dev) {
 201                 printk ("ext2_free_inode: inode has no device\n");
 202                 return;
 203         }
 204         if (inode->i_count > 1) {
 205                 printk ("ext2_free_inode: inode has count=%d\n",
 206                         inode->i_count);
 207                 return;
 208         }
 209         if (inode->i_nlink) {
 210                 printk ("ext2_free_inode: inode has nlink=%d\n",
 211                         inode->i_nlink);
 212                 return;
 213         }
 214         if (!inode->i_sb) {
 215                 printk("ext2_free_inode: inode on nonexistent device\n");
 216                 return;
 217         }
 218 
 219         ext2_debug ("freeing inode %lu\n", inode->i_ino);
 220 
 221         sb = inode->i_sb;
 222         lock_super (sb);
 223         if (inode->i_ino < EXT2_FIRST_INO ||
 224             inode->i_ino > sb->u.ext2_sb.s_es->s_inodes_count) {
 225                 ext2_error (sb, "free_inode",
 226                             "reserved inode or nonexistent inode");
 227                 unlock_super (sb);
 228                 return;
 229         }
 230         es = sb->u.ext2_sb.s_es;
 231         block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(sb);
 232         bit = (inode->i_ino - 1) % EXT2_INODES_PER_GROUP(sb);
 233         bitmap_nr = load_inode_bitmap (sb, block_group);
 234         bh = sb->u.ext2_sb.s_inode_bitmap[bitmap_nr];
 235         if (!clear_bit (bit, bh->b_data))
 236                 ext2_warning (sb, "ext2_free_inode",
 237                               "bit already cleared for inode %lu", inode->i_ino);
 238         else {
 239                 gdp = get_group_desc (sb, block_group, &bh2);
 240                 gdp->bg_free_inodes_count++;
 241                 if (S_ISDIR(inode->i_mode))
 242                         gdp->bg_used_dirs_count--;
 243                 mark_buffer_dirty(bh2, 1);
 244                 es->s_free_inodes_count++;
 245                 mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
 246                 set_inode_dtime (inode, gdp);
 247         }
 248         mark_buffer_dirty(bh, 1);
 249         if (sb->s_flags & MS_SYNC) {
 250                 ll_rw_block (WRITE, 1, &bh);
 251                 wait_on_buffer (bh);
 252         }
 253 
 254         sb->s_dirt = 1;
 255         clear_inode (inode);
 256         unlock_super (sb);
 257 }
 258 
 259 /*
 260  * This function increments the inode version number
 261  *
 262  * This may be used one day by the NFS server
 263  */
 264 static void inc_inode_version (struct inode * inode,
     /*  */
 265                                struct ext2_group_desc *gdp,
 266                                int mode)
 267 {
 268         unsigned long inode_block;
 269         struct buffer_head * bh;
 270         struct ext2_inode * raw_inode;
 271 
 272         inode_block = gdp->bg_inode_table + (((inode->i_ino - 1) %
 273                         EXT2_INODES_PER_GROUP(inode->i_sb)) /
 274                         EXT2_INODES_PER_BLOCK(inode->i_sb));
 275         bh = bread (inode->i_sb->s_dev, inode_block, inode->i_sb->s_blocksize);
 276         if (!bh) {
 277                 ext2_error (inode->i_sb, "inc_inode_version",
 278                             "Cannot load inode table block"
 279                             "inode=%lu, inode_block=%lu\n",
 280                             inode->i_ino, inode_block);
 281                 inode->u.ext2_i.i_version = 1;
 282                 return;
 283         }
 284         raw_inode = ((struct ext2_inode *) bh->b_data) +
 285                         (((inode->i_ino - 1) %
 286                         EXT2_INODES_PER_GROUP(inode->i_sb)) %
 287                         EXT2_INODES_PER_BLOCK(inode->i_sb));
 288         raw_inode->i_version++;
 289         inode->u.ext2_i.i_version = raw_inode->i_version;
 290         mark_buffer_dirty(bh, 1);
 291         brelse (bh);
 292 }
 293 
 294 /*
 295  * There are two policies for allocating an inode.  If the new inode is
 296  * a directory, then a forward search is made for a block group with both
 297  * free space and a low directory-to-inode ratio; if that fails, then of
 298  * the groups with above-average free space, that group with the fewest
 299  * directories already is chosen.
 300  *
 301  * For other inodes, search forward from the parent directory\'s block
 302  * group to find a free inode.
 303  */
 304 struct inode * ext2_new_inode (const struct inode * dir, int mode)
     /*  */
 305 {
 306         struct super_block * sb;
 307         struct buffer_head * bh;
 308         struct buffer_head * bh2;
 309         int i, j, avefreei;
 310         struct inode * inode;
 311         int bitmap_nr;
 312         struct ext2_group_desc * gdp;
 313         struct ext2_group_desc * tmp;
 314         struct ext2_super_block * es;
 315 
 316         if (!dir || !(inode = get_empty_inode ()))
 317                 return NULL;
 318         sb = dir->i_sb;
 319         inode->i_sb = sb;
 320         inode->i_flags = sb->s_flags;
 321         lock_super (sb);
 322         es = sb->u.ext2_sb.s_es;
 323 repeat:
 324         gdp = NULL; i=0;
 325         
 326         if (S_ISDIR(mode)) {
 327                 avefreei = es->s_free_inodes_count /
 328                         sb->u.ext2_sb.s_groups_count;
 329 /* I am not yet convinced that this next bit is necessary.
 330                 i = dir->u.ext2_i.i_block_group;
 331                 for (j = 0; j < sb->u.ext2_sb.s_groups_count; j++) {
 332                         tmp = get_group_desc (sb, i, &bh2);
 333                         if ((tmp->bg_used_dirs_count << 8) < 
 334                             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 = get_group_desc (sb, j, &bh2);
 345                                 if (tmp->bg_free_inodes_count &&
 346                                         tmp->bg_free_inodes_count >= avefreei) {
 347                                         if (!gdp || 
 348                                             (tmp->bg_free_blocks_count >
 349                                              gdp->bg_free_blocks_count)) {
 350                                                 i = j;
 351                                                 gdp = tmp;
 352                                         }
 353                                 }
 354                         }
 355                 }
 356         }
 357         else 
 358         {
 359                 /*
 360                  * Try to place the inode in it's parent directory
 361                  */
 362                 i = dir->u.ext2_i.i_block_group;
 363                 tmp = get_group_desc (sb, i, &bh2);
 364                 if (tmp->bg_free_inodes_count)
 365                         gdp = tmp;
 366                 else
 367                 {
 368                         /*
 369                          * Use a quadratic hash to find a group with a
 370                          * free inode
 371                          */
 372                         for (j = 1; j < sb->u.ext2_sb.s_groups_count; j <<= 1) {
 373                                 i += j;
 374                                 if (i >= sb->u.ext2_sb.s_groups_count)
 375                                         i -= sb->u.ext2_sb.s_groups_count;
 376                                 tmp = get_group_desc (sb, i, &bh2);
 377                                 if (tmp->bg_free_inodes_count) {
 378                                         gdp = tmp;
 379                                         break;
 380                                 }
 381                         }
 382                 }
 383                 if (!gdp) {
 384                         /*
 385                          * That failed: try linear search for a free inode
 386                          */
 387                         i = dir->u.ext2_i.i_block_group + 1;
 388                         for (j = 2; j < sb->u.ext2_sb.s_groups_count; j++) {
 389                                 if (++i >= sb->u.ext2_sb.s_groups_count)
 390                                         i = 0;
 391                                 tmp = get_group_desc (sb, i, &bh2);
 392                                 if (tmp->bg_free_inodes_count) {
 393                                         gdp = tmp;
 394                                         break;
 395                                 }
 396                         }
 397                 }
 398         }
 399 
 400         if (!gdp) {
 401                 unlock_super (sb);
 402                 iput(inode);
 403                 return NULL;
 404         }
 405         bitmap_nr = load_inode_bitmap (sb, i);
 406         bh = sb->u.ext2_sb.s_inode_bitmap[bitmap_nr];
 407         if ((j = find_first_zero_bit ((unsigned long *) bh->b_data,
 408                                       EXT2_INODES_PER_GROUP(sb))) <
 409             EXT2_INODES_PER_GROUP(sb)) {
 410                 if (set_bit (j, bh->b_data)) {
 411                         ext2_warning (sb, "ext2_new_inode",
 412                                       "bit already set for inode %d", j);
 413                         goto repeat;
 414                 }
 415                 mark_buffer_dirty(bh, 1);
 416                 if (sb->s_flags & MS_SYNC) {
 417                         ll_rw_block (WRITE, 1, &bh);
 418                         wait_on_buffer (bh);
 419                 }
 420         } else {
 421                 if (gdp->bg_free_inodes_count != 0) {
 422                         ext2_error (sb, "ext2_new_inode",
 423                                     "Free inodes count corrupted in group %d",
 424                                     i);
 425                         unlock_super (sb);
 426                         iput (inode);
 427                         return NULL;
 428                 }
 429                 goto repeat;
 430         }
 431         j += i * EXT2_INODES_PER_GROUP(sb) + 1;
 432         if (j < EXT2_FIRST_INO || j > es->s_inodes_count) {
 433                 ext2_error (sb, "ext2_new_inode",
 434                             "reserved inode or inode > inodes count\n"
 435                             "block_group = %d,inode=%d", i, j);
 436                 unlock_super (sb);
 437                 iput (inode);
 438                 return NULL;
 439         }
 440         gdp->bg_free_inodes_count--;
 441         if (S_ISDIR(mode))
 442                 gdp->bg_used_dirs_count++;
 443         mark_buffer_dirty(bh2, 1);
 444         es->s_free_inodes_count--;
 445         mark_buffer_dirty(sb->u.ext2_sb.s_sbh, 1);
 446         sb->s_dirt = 1;
 447         inode->i_mode = mode;
 448         inode->i_sb = sb;
 449         inode->i_count = 1;
 450         inode->i_nlink = 1;
 451         inode->i_dev = sb->s_dev;
 452         inode->i_uid = current->fsuid;
 453         if (test_opt (sb, GRPID))
 454                 inode->i_gid = dir->i_gid;
 455         else if (dir->i_mode & S_ISGID) {
 456                 inode->i_gid = dir->i_gid;
 457                 if (S_ISDIR(mode))
 458                         mode |= S_ISGID;
 459         } else
 460                 inode->i_gid = current->fsgid;
 461         inode->i_dirt = 1;
 462         inode->i_ino = j;
 463         inode->i_blksize = sb->s_blocksize;
 464         inode->i_blocks = 0;
 465         inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 466         inode->u.ext2_i.i_flags = dir->u.ext2_i.i_flags;
 467         inode->u.ext2_i.i_faddr = 0;
 468         inode->u.ext2_i.i_frag_no = 0;
 469         inode->u.ext2_i.i_frag_size = 0;
 470         inode->u.ext2_i.i_file_acl = 0;
 471         inode->u.ext2_i.i_dir_acl = 0;
 472         inode->u.ext2_i.i_dtime = 0;
 473         inode->u.ext2_i.i_block_group = i;
 474         inode->i_op = NULL;
 475         if (inode->u.ext2_i.i_flags & EXT2_SYNC_FL)
 476                 inode->i_flags |= MS_SYNC;
 477         insert_inode_hash(inode);
 478         inc_inode_version (inode, gdp, mode);
 479 
 480         ext2_debug ("allocating inode %lu\n", inode->i_ino);
 481 
 482         unlock_super (sb);
 483         return inode;
 484 }
 485 
 486 unsigned long ext2_count_free_inodes (struct super_block * sb)
     /*  */
 487 {
 488 #ifdef EXT2FS_DEBUG
 489         struct ext2_super_block * es;
 490         unsigned long desc_count, bitmap_count, x;
 491         int bitmap_nr;
 492         struct ext2_group_desc * gdp;
 493         int i;
 494 
 495         lock_super (sb);
 496         es = sb->u.ext2_sb.s_es;
 497         desc_count = 0;
 498         bitmap_count = 0;
 499         gdp = NULL;
 500         for (i = 0; i < sb->u.ext2_sb.s_groups_count; i++) {
 501                 gdp = get_group_desc (sb, i, NULL);
 502                 desc_count += gdp->bg_free_inodes_count;
 503                 bitmap_nr = load_inode_bitmap (sb, i);
 504                 x = ext2_count_free (sb->u.ext2_sb.s_inode_bitmap[bitmap_nr],
 505                                      EXT2_INODES_PER_GROUP(sb) / 8);
 506                 printk ("group %d: stored = %d, counted = %lu\n",
 507                         i, gdp->bg_free_inodes_count, x);
 508                 bitmap_count += x;
 509         }
 510         printk("ext2_count_free_inodes: stored = %lu, computed = %lu, %lu\n",
 511                 es->s_free_inodes_count, desc_count, bitmap_count);
 512         unlock_super (sb);
 513         return desc_count;
 514 #else
 515         return sb->u.ext2_sb.s_es->s_free_inodes_count;
 516 #endif
 517 }
 518 
 519 void ext2_check_inodes_bitmap (struct super_block * sb)
     /*  */
 520 {
 521         struct ext2_super_block * es;
 522         unsigned long desc_count, bitmap_count, x;
 523         int bitmap_nr;
 524         struct ext2_group_desc * gdp;
 525         int i;
 526 
 527         lock_super (sb);
 528         es = sb->u.ext2_sb.s_es;
 529         desc_count = 0;
 530         bitmap_count = 0;
 531         gdp = NULL;
 532         for (i = 0; i < sb->u.ext2_sb.s_groups_count; i++) {
 533                 gdp = get_group_desc (sb, i, NULL);
 534                 desc_count += gdp->bg_free_inodes_count;
 535                 bitmap_nr = load_inode_bitmap (sb, i);
 536                 x = ext2_count_free (sb->u.ext2_sb.s_inode_bitmap[bitmap_nr],
 537                                      EXT2_INODES_PER_GROUP(sb) / 8);
 538                 if (gdp->bg_free_inodes_count != x)
 539                         ext2_error (sb, "ext2_check_inodes_bitmap",
 540                                     "Wrong free inodes count in group %d, "
 541                                     "stored = %d, counted = %lu", i,
 542                                     gdp->bg_free_inodes_count, x);
 543                 bitmap_count += x;
 544         }
 545         if (es->s_free_inodes_count != bitmap_count)
 546                 ext2_error (sb, "ext2_check_inodes_bitmap",
 547                             "Wrong free inodes count in super block, "
 548                             "stored = %lu, counted = %lu",
 549                             es->s_free_inodes_count, bitmap_count);
 550         unlock_super (sb);
 551 }
/* */
root/fs/ext2/ialloc.c

DEFINITIONS
