/*
 *  linux/fs/ext3/ialloc.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  BSD ufs-inspired inode and directory allocation by
 *  Stephen Tweedie (sct@redhat.com), 1993
 *  Big-endian to little-endian byte-swapping/bitmaps by
 *        David S. Miller (davem@caip.rutgers.edu), 1995
 */

#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/jbd.h>
#include <linux/ext3_fs.h>
#include <linux/ext3_jbd.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/locks.h>
#include <linux/quotaops.h>

#include <asm/bitops.h>
#include <asm/byteorder.h>

/*
 * ialloc.c contains the inodes allocation and deallocation routines
 */

/*
 * The free inodes are managed by bitmaps.  A file system contains several
 * blocks groups.  Each group contains 1 bitmap block for blocks, 1 bitmap
 * block for inodes, N blocks for the inode table and data blocks.
 *
 * The file system contains group descriptors which are located after the
 * super block.  Each descriptor contains the number of the bitmap block and
 * the free blocks count in the block.  The descriptors are loaded in memory
 * when a file system is mounted (see ext3_read_super).
 */


/*
 * Read the inode allocation bitmap for a given block_group, reading
 * into the specified slot in the superblock's bitmap cache.
 *
 * Return >=0 on success or a -ve error code.
 */
static int read_inode_bitmap (struct super_block * sb,
                               unsigned long block_group,
                               unsigned int bitmap_nr)
{
        struct ext3_group_desc * gdp;
        struct buffer_head * bh = NULL;
        int retval = 0;

        gdp = ext3_get_group_desc (sb, block_group, NULL);
        if (!gdp) {
                retval = -EIO;
                goto error_out;
        }
        bh = sb_bread(sb, le32_to_cpu(gdp->bg_inode_bitmap));
        if (!bh) {
                ext3_error (sb, "read_inode_bitmap",
                            "Cannot read inode bitmap - "
                            "block_group = %lu, inode_bitmap = %u",
                            block_group, gdp->bg_inode_bitmap);
                retval = -EIO;
        }
        /*
         * On IO error, just leave a zero in the superblock's block pointer for
         * this group.  The IO will be retried next time.
         */
error_out:
        sb->u.ext3_sb.s_inode_bitmap_number[bitmap_nr] = block_group;
        sb->u.ext3_sb.s_inode_bitmap[bitmap_nr] = bh;
        return retval;
}

/*
 * load_inode_bitmap loads the inode bitmap for a blocks group
 *
 * It maintains a cache for the last bitmaps loaded.  This cache is managed
 * with a LRU algorithm.
 *
 * Notes:
 * 1/ There is one cache per mounted file system.
 * 2/ If the file system contains less than EXT3_MAX_GROUP_LOADED groups,
 *    this function reads the bitmap without maintaining a LRU cache.
 *
 * Return the slot used to store the bitmap, or a -ve error code.
 */
static int load_inode_bitmap (struct super_block * sb,
                              unsigned int block_group)
{
        struct ext3_sb_info *sbi = EXT3_SB(sb);
        unsigned long inode_bitmap_number;
        struct buffer_head * inode_bitmap;
        int i, j, retval = 0;

        if (block_group >= sbi->s_groups_count)
                ext3_panic (sb, "load_inode_bitmap",
                            "block_group >= groups_count - "
                            "block_group = %d, groups_count = %lu",
                            block_group, sbi->s_groups_count);
        if (sbi->s_loaded_inode_bitmaps > 0 &&
            sbi->s_inode_bitmap_number[0] == block_group &&
            sbi->s_inode_bitmap[0] != NULL)
                return 0;
        if (sbi->s_groups_count <= EXT3_MAX_GROUP_LOADED) {
                if (sbi->s_inode_bitmap[block_group]) {
                        if (sbi->s_inode_bitmap_number[block_group] !=
                                                block_group)
                                ext3_panic(sb, "load_inode_bitmap",
                                        "block_group != inode_bitmap_number");
                        return block_group;
                }
                retval = read_inode_bitmap(sb, block_group, block_group);
                if (retval < 0)
                        return retval;
                return block_group;
        }

        for (i = 0; i < sbi->s_loaded_inode_bitmaps &&
                    sbi->s_inode_bitmap_number[i] != block_group; i++)
                /* do nothing */;
        if (i < sbi->s_loaded_inode_bitmaps &&
            sbi->s_inode_bitmap_number[i] == block_group) {
                inode_bitmap_number = sbi->s_inode_bitmap_number[i];
                inode_bitmap = sbi->s_inode_bitmap[i];
                for (j = i; j > 0; j--) {
                        sbi->s_inode_bitmap_number[j] =
                                sbi->s_inode_bitmap_number[j - 1];
                        sbi->s_inode_bitmap[j] = sbi->s_inode_bitmap[j - 1];
                }
                sbi->s_inode_bitmap_number[0] = inode_bitmap_number;
                sbi->s_inode_bitmap[0] = inode_bitmap;

                /*
                 * There's still one special case here --- if inode_bitmap == 0
                 * then our last attempt to read the bitmap failed and we have
                 * just ended up caching that failure.  Try again to read it.
                 */
                if (!inode_bitmap)
                        retval = read_inode_bitmap (sb, block_group, 0);
        } else {
                if (sbi->s_loaded_inode_bitmaps < EXT3_MAX_GROUP_LOADED)
                        sbi->s_loaded_inode_bitmaps++;
                else
                        brelse(sbi->s_inode_bitmap[EXT3_MAX_GROUP_LOADED - 1]);
                for (j = sbi->s_loaded_inode_bitmaps - 1; j > 0; j--) {
                        sbi->s_inode_bitmap_number[j] =
                                sbi->s_inode_bitmap_number[j - 1];
                        sbi->s_inode_bitmap[j] = sbi->s_inode_bitmap[j - 1];
                }
                retval = read_inode_bitmap (sb, block_group, 0);
        }
        return retval;
}

/*
 * NOTE! When we get the inode, we're the only people
 * that have access to it, and as such there are no
 * race conditions we have to worry about. The inode
 * is not on the hash-lists, and it cannot be reached
 * through the filesystem because the directory entry
 * has been deleted earlier.
 *
 * HOWEVER: we must make sure that we get no aliases,
 * which means that we have to call "clear_inode()"
 * _before_ we mark the inode not in use in the inode
 * bitmaps. Otherwise a newly created file might use
 * the same inode number (not actually the same pointer
 * though), and then we'd have two inodes sharing the
 * same inode number and space on the harddisk.
 */
void ext3_free_inode (handle_t *handle, struct inode * inode)
{
        struct super_block * sb = inode->i_sb;
        int is_directory;
        unsigned long ino;
        struct buffer_head * bh;
        struct buffer_head * bh2;
        unsigned long block_group;
        unsigned long bit;
        int bitmap_nr;
        struct ext3_group_desc * gdp;
        struct ext3_super_block * es;
        int fatal = 0, err;

        if (!inode->i_dev) {
                printk ("ext3_free_inode: inode has no device\n");
                return;
        }
        if (atomic_read(&inode->i_count) > 1) {
                printk ("ext3_free_inode: inode has count=%d\n",
                                        atomic_read(&inode->i_count));
                return;
        }
        if (inode->i_nlink) {
                printk ("ext3_free_inode: inode has nlink=%d\n",
                        inode->i_nlink);
                return;
        }
        if (!sb) {
                printk("ext3_free_inode: inode on nonexistent device\n");
                return;
        }

        ino = inode->i_ino;
        ext3_debug ("freeing inode %lu\n", ino);

        /*
         * Note: we must free any quota before locking the superblock,
         * as writing the quota to disk may need the lock as well.
         */
        DQUOT_INIT(inode);
        DQUOT_FREE_INODE(inode);
        DQUOT_DROP(inode);

        is_directory = S_ISDIR(inode->i_mode);

        /* Do this BEFORE marking the inode not in use or returning an error */
        clear_inode (inode);

        lock_super (sb);
        es = sb->u.ext3_sb.s_es;
        if (ino < EXT3_FIRST_INO(sb) || ino > le32_to_cpu(es->s_inodes_count)) {
                ext3_error (sb, "ext3_free_inode",
                            "reserved or nonexistent inode %lu", ino);
                goto error_return;
        }
        block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
        bit = (ino - 1) % EXT3_INODES_PER_GROUP(sb);
        bitmap_nr = load_inode_bitmap (sb, block_group);
        if (bitmap_nr < 0)
                goto error_return;

        bh = sb->u.ext3_sb.s_inode_bitmap[bitmap_nr];

        BUFFER_TRACE(bh, "get_write_access");
        fatal = ext3_journal_get_write_access(handle, bh);
        if (fatal)
                goto error_return;

        /* Ok, now we can actually update the inode bitmaps.. */
        if (!ext3_clear_bit (bit, bh->b_data))
                ext3_error (sb, "ext3_free_inode",
                              "bit already cleared for inode %lu", ino);
        else {
                gdp = ext3_get_group_desc (sb, block_group, &bh2);

                BUFFER_TRACE(bh2, "get_write_access");
                fatal = ext3_journal_get_write_access(handle, bh2);
                if (fatal) goto error_return;

                BUFFER_TRACE(sb->u.ext3_sb.s_sbh, "get write access");
                fatal = ext3_journal_get_write_access(handle, sb->u.ext3_sb.s_sbh);
                if (fatal) goto error_return;

                if (gdp) {
                        gdp->bg_free_inodes_count = cpu_to_le16(
                                le16_to_cpu(gdp->bg_free_inodes_count) + 1);
                        if (is_directory)
                                gdp->bg_used_dirs_count = cpu_to_le16(
                                  le16_to_cpu(gdp->bg_used_dirs_count) - 1);
                }
                BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
                err = ext3_journal_dirty_metadata(handle, bh2);
                if (!fatal) fatal = err;
                es->s_free_inodes_count =
                        cpu_to_le32(le32_to_cpu(es->s_free_inodes_count) + 1);
                BUFFER_TRACE(sb->u.ext3_sb.s_sbh,
                                        "call ext3_journal_dirty_metadata");
                err = ext3_journal_dirty_metadata(handle, sb->u.ext3_sb.s_sbh);
                if (!fatal) fatal = err;
        }
        BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
        err = ext3_journal_dirty_metadata(handle, bh);
        if (!fatal)
                fatal = err;
        sb->s_dirt = 1;
error_return:
        ext3_std_error(sb, fatal);
        unlock_super(sb);
}

/*
 * There are two policies for allocating an inode.  If the new inode is
 * a directory, then a forward search is made for a block group with both
 * free space and a low directory-to-inode ratio; if that fails, then of
 * the groups with above-average free space, that group with the fewest
 * directories already is chosen.
 *
 * For other inodes, search forward from the parent directory's block
 * group to find a free inode.
 */
struct inode * ext3_new_inode (handle_t *handle,
                                const struct inode * dir, int mode)
{
        struct super_block * sb;
        struct buffer_head * bh;
        struct buffer_head * bh2;
        int i, j, avefreei;
        struct inode * inode;
        int bitmap_nr;
        struct ext3_group_desc * gdp;
        struct ext3_group_desc * tmp;
        struct ext3_super_block * es;
        int err = 0;

        /* Cannot create files in a deleted directory */
        if (!dir || !dir->i_nlink)
                return ERR_PTR(-EPERM);

        sb = dir->i_sb;
        inode = new_inode(sb);
        if (!inode)
                return ERR_PTR(-ENOMEM);
        init_rwsem(&inode->u.ext3_i.truncate_sem);

        lock_super (sb);
        es = sb->u.ext3_sb.s_es;
repeat:
        gdp = NULL;
        i = 0;

        if (S_ISDIR(mode)) {
                avefreei = le32_to_cpu(es->s_free_inodes_count) /
                        sb->u.ext3_sb.s_groups_count;
                if (!gdp) {
                        for (j = 0; j < sb->u.ext3_sb.s_groups_count; j++) {
                                struct buffer_head *temp_buffer;
                                tmp = ext3_get_group_desc (sb, j, &temp_buffer);
                                if (tmp &&
                                    le16_to_cpu(tmp->bg_free_inodes_count) &&
                                    le16_to_cpu(tmp->bg_free_inodes_count) >=
                                                        avefreei) {
                                        if (!gdp || (le16_to_cpu(tmp->bg_free_blocks_count) >
                                                le16_to_cpu(gdp->bg_free_blocks_count))) {
                                                i = j;
                                                gdp = tmp;
                                                bh2 = temp_buffer;
                                        }
                                }
                        }
                }
        } else {
                /*
                 * Try to place the inode in its parent directory
                 */
                i = dir->u.ext3_i.i_block_group;
                tmp = ext3_get_group_desc (sb, i, &bh2);
                if (tmp && le16_to_cpu(tmp->bg_free_inodes_count))
                        gdp = tmp;
                else
                {
                        /*
                         * Use a quadratic hash to find a group with a
                         * free inode
                         */
                        for (j = 1; j < sb->u.ext3_sb.s_groups_count; j <<= 1) {
                                i += j;
                                if (i >= sb->u.ext3_sb.s_groups_count)
                                        i -= sb->u.ext3_sb.s_groups_count;
                                tmp = ext3_get_group_desc (sb, i, &bh2);
                                if (tmp &&
                                    le16_to_cpu(tmp->bg_free_inodes_count)) {
                                        gdp = tmp;
                                        break;
                                }
                        }
                }
                if (!gdp) {
                        /*
                         * That failed: try linear search for a free inode
                         */
                        i = dir->u.ext3_i.i_block_group + 1;
                        for (j = 2; j < sb->u.ext3_sb.s_groups_count; j++) {
                                if (++i >= sb->u.ext3_sb.s_groups_count)
                                        i = 0;
                                tmp = ext3_get_group_desc (sb, i, &bh2);
                                if (tmp &&
                                    le16_to_cpu(tmp->bg_free_inodes_count)) {
                                        gdp = tmp;
                                        break;
                                }
                        }
                }
        }

        err = -ENOSPC;
        if (!gdp)
                goto out;

        err = -EIO;
        bitmap_nr = load_inode_bitmap (sb, i);
        if (bitmap_nr < 0)
                goto fail;

        bh = sb->u.ext3_sb.s_inode_bitmap[bitmap_nr];

        if ((j = ext3_find_first_zero_bit ((unsigned long *) bh->b_data,
                                      EXT3_INODES_PER_GROUP(sb))) <
            EXT3_INODES_PER_GROUP(sb)) {
                BUFFER_TRACE(bh, "get_write_access");
                err = ext3_journal_get_write_access(handle, bh);
                if (err) goto fail;
                
                if (ext3_set_bit (j, bh->b_data)) {
                        ext3_error (sb, "ext3_new_inode",
                                      "bit already set for inode %d", j);
                        goto repeat;
                }
                BUFFER_TRACE(bh, "call ext3_journal_dirty_metadata");
                err = ext3_journal_dirty_metadata(handle, bh);
                if (err) goto fail;
        } else {
                if (le16_to_cpu(gdp->bg_free_inodes_count) != 0) {
                        ext3_error (sb, "ext3_new_inode",
                                    "Free inodes count corrupted in group %d",
                                    i);
                        /* Is it really ENOSPC? */
                        err = -ENOSPC;
                        if (sb->s_flags & MS_RDONLY)
                                goto fail;

                        BUFFER_TRACE(bh2, "get_write_access");
                        err = ext3_journal_get_write_access(handle, bh2);
                        if (err) goto fail;
                        gdp->bg_free_inodes_count = 0;
                        BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
                        err = ext3_journal_dirty_metadata(handle, bh2);
                        if (err) goto fail;
                }
                goto repeat;
        }
        j += i * EXT3_INODES_PER_GROUP(sb) + 1;
        if (j < EXT3_FIRST_INO(sb) || j > le32_to_cpu(es->s_inodes_count)) {
                ext3_error (sb, "ext3_new_inode",
                            "reserved inode or inode > inodes count - "
                            "block_group = %d,inode=%d", i, j);
                err = -EIO;
                goto fail;
        }

        BUFFER_TRACE(bh2, "get_write_access");
        err = ext3_journal_get_write_access(handle, bh2);
        if (err) goto fail;
        gdp->bg_free_inodes_count =
                cpu_to_le16(le16_to_cpu(gdp->bg_free_inodes_count) - 1);
        if (S_ISDIR(mode))
                gdp->bg_used_dirs_count =
                        cpu_to_le16(le16_to_cpu(gdp->bg_used_dirs_count) + 1);
        BUFFER_TRACE(bh2, "call ext3_journal_dirty_metadata");
        err = ext3_journal_dirty_metadata(handle, bh2);
        if (err) goto fail;
        
        BUFFER_TRACE(sb->u.ext3_sb.s_sbh, "get_write_access");
        err = ext3_journal_get_write_access(handle, sb->u.ext3_sb.s_sbh);
        if (err) goto fail;
        es->s_free_inodes_count =
                cpu_to_le32(le32_to_cpu(es->s_free_inodes_count) - 1);
        BUFFER_TRACE(sb->u.ext3_sb.s_sbh, "call ext3_journal_dirty_metadata");
        err = ext3_journal_dirty_metadata(handle, sb->u.ext3_sb.s_sbh);
        sb->s_dirt = 1;
        if (err) goto fail;

        inode->i_uid = current->fsuid;
        if (test_opt (sb, GRPID))
                inode->i_gid = dir->i_gid;
        else if (dir->i_mode & S_ISGID) {
                inode->i_gid = dir->i_gid;
                if (S_ISDIR(mode))
                        mode |= S_ISGID;
        } else
                inode->i_gid = current->fsgid;
        inode->i_mode = mode;

        inode->i_ino = j;
        /* This is the optimal IO size (for stat), not the fs block size */
        inode->i_blksize = PAGE_SIZE;
        inode->i_blocks = 0;
        inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
        inode->u.ext3_i.i_flags = dir->u.ext3_i.i_flags & ~EXT3_INDEX_FL;
        if (S_ISLNK(mode))
                inode->u.ext3_i.i_flags &= ~(EXT3_IMMUTABLE_FL|EXT3_APPEND_FL);
#ifdef EXT3_FRAGMENTS
        inode->u.ext3_i.i_faddr = 0;
        inode->u.ext3_i.i_frag_no = 0;
        inode->u.ext3_i.i_frag_size = 0;
#endif
        inode->u.ext3_i.i_file_acl = 0;
        inode->u.ext3_i.i_dir_acl = 0;
        inode->u.ext3_i.i_dtime = 0;
        INIT_LIST_HEAD(&inode->u.ext3_i.i_orphan);
#ifdef EXT3_PREALLOCATE
        inode->u.ext3_i.i_prealloc_count = 0;
#endif
        inode->u.ext3_i.i_block_group = i;
        
        ext3_set_inode_flags(inode);
        if (IS_SYNC(inode))
                handle->h_sync = 1;
        insert_inode_hash(inode);
        inode->i_generation = sb->u.ext3_sb.s_next_generation++;

        inode->u.ext3_i.i_state = EXT3_STATE_NEW;
        err = ext3_mark_inode_dirty(handle, inode);
        if (err) goto fail;
        
        unlock_super (sb);
        if(DQUOT_ALLOC_INODE(inode)) {
                DQUOT_DROP(inode);
                inode->i_flags |= S_NOQUOTA;
                inode->i_nlink = 0;
                iput(inode);
                return ERR_PTR(-EDQUOT);
        }
        ext3_debug ("allocating inode %lu\n", inode->i_ino);
        return inode;

fail:
        ext3_std_error(sb, err);
out:
        unlock_super(sb);
        iput(inode);
        return ERR_PTR(err);
}

/* Verify that we are loading a valid orphan from disk */
struct inode *ext3_orphan_get(struct super_block *sb, unsigned long ino)
{
        unsigned long max_ino = le32_to_cpu(EXT3_SB(sb)->s_es->s_inodes_count);
        unsigned long block_group;
        int bit;
        int bitmap_nr;
        struct buffer_head *bh;
        struct inode *inode = NULL;

        /* Error cases - e2fsck has already cleaned up for us */
        if (ino > max_ino) {
                ext3_warning(sb, __FUNCTION__,
                             "bad orphan ino %lu!  e2fsck was run?\n", ino);
                return NULL;
        }

        block_group = (ino - 1) / EXT3_INODES_PER_GROUP(sb);
        bit = (ino - 1) % EXT3_INODES_PER_GROUP(sb);
        if ((bitmap_nr = load_inode_bitmap(sb, block_group)) < 0 ||
            !(bh = EXT3_SB(sb)->s_inode_bitmap[bitmap_nr])) {
                ext3_warning(sb, __FUNCTION__,
                             "inode bitmap error for orphan %lu\n", ino);
                return NULL;
        }

        /* Having the inode bit set should be a 100% indicator that this
         * is a valid orphan (no e2fsck run on fs).  Orphans also include
         * inodes that were being truncated, so we can't check i_nlink==0.
         */
        if (!ext3_test_bit(bit, bh->b_data) || !(inode = iget(sb, ino)) ||
            is_bad_inode(inode) || NEXT_ORPHAN(inode) > max_ino) {
                ext3_warning(sb, __FUNCTION__,
                             "bad orphan inode %lu!  e2fsck was run?\n", ino);
                printk(KERN_NOTICE "ext3_test_bit(bit=%d, block=%ld) = %d\n",
                       bit, bh->b_blocknr, ext3_test_bit(bit, bh->b_data));
                printk(KERN_NOTICE "inode=%p\n", inode);
                if (inode) {
                        printk(KERN_NOTICE "is_bad_inode(inode)=%d\n",
                               is_bad_inode(inode));
                        printk(KERN_NOTICE "NEXT_ORPHAN(inode)=%u\n",
                               NEXT_ORPHAN(inode));
                        printk(KERN_NOTICE "max_ino=%lu\n", max_ino);
                }
                /* Avoid freeing blocks if we got a bad deleted inode */
                if (inode && inode->i_nlink == 0)
                        inode->i_blocks = 0;
                iput(inode);
                return NULL;
        }

        return inode;
}

unsigned long ext3_count_free_inodes (struct super_block * sb)
{
#ifdef EXT3FS_DEBUG
        struct ext3_super_block * es;
        unsigned long desc_count, bitmap_count, x;
        int bitmap_nr;
        struct ext3_group_desc * gdp;
        int i;

        lock_super (sb);
        es = sb->u.ext3_sb.s_es;
        desc_count = 0;
        bitmap_count = 0;
        gdp = NULL;
        for (i = 0; i < sb->u.ext3_sb.s_groups_count; i++) {
                gdp = ext3_get_group_desc (sb, i, NULL);
                if (!gdp)
                        continue;
                desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
                bitmap_nr = load_inode_bitmap (sb, i);
                if (bitmap_nr < 0)
                        continue;

                x = ext3_count_free (sb->u.ext3_sb.s_inode_bitmap[bitmap_nr],
                                     EXT3_INODES_PER_GROUP(sb) / 8);
                printk ("group %d: stored = %d, counted = %lu\n",
                        i, le16_to_cpu(gdp->bg_free_inodes_count), x);
                bitmap_count += x;
        }
        printk("ext3_count_free_inodes: stored = %lu, computed = %lu, %lu\n",
                le32_to_cpu(es->s_free_inodes_count), desc_count, bitmap_count);
        unlock_super (sb);
        return desc_count;
#else
        return le32_to_cpu(sb->u.ext3_sb.s_es->s_free_inodes_count);
#endif
}

#ifdef CONFIG_EXT3_CHECK
/* Called at mount-time, super-block is locked */
void ext3_check_inodes_bitmap (struct super_block * sb)
{
        struct ext3_super_block * es;
        unsigned long desc_count, bitmap_count, x;
        int bitmap_nr;
        struct ext3_group_desc * gdp;
        int i;

        es = sb->u.ext3_sb.s_es;
        desc_count = 0;
        bitmap_count = 0;
        gdp = NULL;
        for (i = 0; i < sb->u.ext3_sb.s_groups_count; i++) {
                gdp = ext3_get_group_desc (sb, i, NULL);
                if (!gdp)
                        continue;
                desc_count += le16_to_cpu(gdp->bg_free_inodes_count);
                bitmap_nr = load_inode_bitmap (sb, i);
                if (bitmap_nr < 0)
                        continue;

                x = ext3_count_free (sb->u.ext3_sb.s_inode_bitmap[bitmap_nr],
                                     EXT3_INODES_PER_GROUP(sb) / 8);
                if (le16_to_cpu(gdp->bg_free_inodes_count) != x)
                        ext3_error (sb, "ext3_check_inodes_bitmap",
                                    "Wrong free inodes count in group %d, "
                                    "stored = %d, counted = %lu", i,
                                    le16_to_cpu(gdp->bg_free_inodes_count), x);
                bitmap_count += x;
        }
        if (le32_to_cpu(es->s_free_inodes_count) != bitmap_count)
                ext3_error (sb, "ext3_check_inodes_bitmap",
                            "Wrong free inodes count in super block, "
                            "stored = %lu, counted = %lu",
                            (unsigned long)le32_to_cpu(es->s_free_inodes_count),
                            bitmap_count);
}
#endif