C++ UFSD函数代码示例

/*
 * Read on-disk structures associated with cylinder groups
 */
int ufs_read_cylinder_structures (struct super_block * sb) {
	struct ufs_sb_private_info * uspi;
	struct ufs_buffer_head * ubh;
	unsigned char * base, * space;
	unsigned size, blks, i;
	
	UFSD(("ENTER\n"))
	
	uspi = sb->u.ufs_sb.s_uspi;
	
	/*
	 * Read cs structures from (usually) first data block
	 * on the device. 
	 */
	size = uspi->s_cssize;
	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
	base = space = kmalloc(size, GFP_KERNEL);
	if (!base)
		goto failed; 
	for (i = 0; i < blks; i += uspi->s_fpb) {
		size = uspi->s_bsize;
		if (i + uspi->s_fpb > blks)
			size = (blks - i) * uspi->s_fsize;
		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
		if (!ubh)
			goto failed;
		ubh_ubhcpymem (space, ubh, size);
		sb->u.ufs_sb.s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space;
		space += size;
		ubh_brelse (ubh);
		ubh = NULL;
	}

	/*
	 * Read cylinder group (we read only first fragment from block
	 * at this time) and prepare internal data structures for cg caching.
	 */
	if (!(sb->u.ufs_sb.s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
		goto failed;
	for (i = 0; i < uspi->s_ncg; i++) 
		sb->u.ufs_sb.s_ucg[i] = NULL;
	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
		sb->u.ufs_sb.s_ucpi[i] = NULL;
		sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
	}
	for (i = 0; i < uspi->s_ncg; i++) {
		UFSD(("read cg %u\n", i))
		if (!(sb->u.ufs_sb.s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
			goto failed;
		if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data))
			goto failed;
#ifdef UFS_SUPER_DEBUG_MORE
		ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data);
#endif
	}
	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
		if (!(sb->u.ufs_sb.s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
			goto failed;
		sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY;
	}
	sb->u.ufs_sb.s_cg_loaded = 0;
	UFSD(("EXIT\n"))
	return 1;

failed:
	if (base) kfree (base);
	if (sb->u.ufs_sb.s_ucg) {
		for (i = 0; i < uspi->s_ncg; i++)
			if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]);
		kfree (sb->u.ufs_sb.s_ucg);
		for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
			if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]);
	}
	UFSD(("EXIT (FAILED)\n"))
	return 0;
}

struct super_block * ufs_read_super (struct super_block * sb, void * data,
	int silent)
{
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_super_block_second * usb2;
	struct ufs_super_block_third * usb3;
	struct ufs_buffer_head * ubh;	
	struct inode *inode;
	unsigned block_size, super_block_size;
	unsigned flags;

	uspi = NULL;
	ubh = NULL;
	flags = 0;
	
	UFSD(("ENTER\n"))
		
	UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
	
#ifndef CONFIG_UFS_FS_WRITE
	if (!(sb->s_flags & MS_RDONLY)) {
		printk("ufs was compiled with read-only support, "
		"can't be mounted as read-write\n");
		goto failed;
	}
#endif
	/*
	 * Set default mount options
	 * Parse mount options
	 */
	sb->u.ufs_sb.s_mount_opt = 0;
	ufs_set_opt (sb->u.ufs_sb.s_mount_opt, ONERROR_LOCK);
	if (!ufs_parse_options ((char *) data, &sb->u.ufs_sb.s_mount_opt)) {
		printk("wrong mount options\n");
		goto failed;
	}
	if (!(sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE)) {
		printk("You didn't specify the type of your ufs filesystem\n\n"
		"mount -t ufs -o ufstype="
		"sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
		">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
		"default is ufstype=old\n");
		ufs_set_opt (sb->u.ufs_sb.s_mount_opt, UFSTYPE_OLD);
	}

	sb->u.ufs_sb.s_uspi = uspi =
		kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
	if (!uspi)
		goto failed;

	/* Keep 2Gig file limit. Some UFS variants need to override 
	   this but as I don't know which I'll let those in the know loosen
	   the rules */
	   
	switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) {
	case UFS_MOUNT_UFSTYPE_44BSD:
		UFSD(("ufstype=44bsd\n"))
		uspi->s_fsize = block_size = 512;
		uspi->s_fmask = ~(512 - 1);
		uspi->s_fshift = 9;
		uspi->s_sbsize = super_block_size = 1536;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		break;
		
	case UFS_MOUNT_UFSTYPE_SUN:
		UFSD(("ufstype=sun\n"))
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		uspi->s_maxsymlinklen = 56;
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_SUNx86:
		UFSD(("ufstype=sunx86\n"))
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		uspi->s_maxsymlinklen = 56;
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_OLD:
		UFSD(("ufstype=old\n"))
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			printk(KERN_INFO "ufstype=old is supported read-only\n"); 
			sb->s_flags |= MS_RDONLY;
		}
//.........这里部分代码省略.........

static int ufs_parse_options (char * options, unsigned * mount_options)
{
	char * p;
	
	UFSD("ENTER\n");
	
	if (!options)
		return 1;

	while ((p = strsep(&options, ",")) != NULL) {
		substring_t args[MAX_OPT_ARGS];
		int token;
		if (!*p)
			continue;

		token = match_token(p, tokens, args);
		switch (token) {
		case Opt_type_old:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_OLD);
			break;
		case Opt_type_sunx86:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
			break;
		case Opt_type_sun:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_SUN);
			break;
		case Opt_type_sunos:
			ufs_clear_opt(*mount_options, UFSTYPE);
			ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
			break;
		case Opt_type_44bsd:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_44BSD);
			break;
		case Opt_type_ufs2:
			ufs_clear_opt(*mount_options, UFSTYPE);
			ufs_set_opt(*mount_options, UFSTYPE_UFS2);
			break;
		case Opt_type_hp:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_HP);
			break;
		case Opt_type_nextstepcd:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
			break;
		case Opt_type_nextstep:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
			break;
		case Opt_type_openstep:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
			break;
		case Opt_onerror_panic:
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_PANIC);
			break;
		case Opt_onerror_lock:
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_LOCK);
			break;
		case Opt_onerror_umount:
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_UMOUNT);
			break;
		case Opt_onerror_repair:
			printk("UFS-fs: Unable to do repair on error, "
				"will lock lock instead\n");
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_REPAIR);
			break;
		default:
			printk("UFS-fs: Invalid option: \"%s\" "
					"or missing value\n", p);
			return 0;
		}
	}
	return 1;
}

static int ufs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct ufs_sb_info * sbi;
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_super_block_second * usb2;
	struct ufs_super_block_third * usb3;
	struct ufs_buffer_head * ubh;	
	struct inode *inode;
	unsigned block_size, super_block_size;
	unsigned flags;
	unsigned super_block_offset;
	unsigned maxsymlen;
	int ret = -EINVAL;

	uspi = NULL;
	ubh = NULL;
	flags = 0;
	
	UFSD("ENTER\n");
		
	sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
	if (!sbi)
		goto failed_nomem;
	sb->s_fs_info = sbi;

	UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
	
#ifndef CONFIG_UFS_FS_WRITE
	if (!(sb->s_flags & MS_RDONLY)) {
		printk("ufs was compiled with read-only support, "
		"can't be mounted as read-write\n");
		goto failed;
	}
#endif
	mutex_init(&sbi->mutex);
	/*
	 * Set default mount options
	 * Parse mount options
	 */
	sbi->s_mount_opt = 0;
	ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
	if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
		printk("wrong mount options\n");
		goto failed;
	}
	if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
		if (!silent)
			printk("You didn't specify the type of your ufs filesystem\n\n"
			"mount -t ufs -o ufstype="
			"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
			">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
			"default is ufstype=old\n");
		ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
	}

	uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
	sbi->s_uspi = uspi;
	if (!uspi)
		goto failed;
	uspi->s_dirblksize = UFS_SECTOR_SIZE;
	super_block_offset=UFS_SBLOCK;

	/* Keep 2Gig file limit. Some UFS variants need to override 
	   this but as I don't know which I'll let those in the know loosen
	   the rules */
	switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
	case UFS_MOUNT_UFSTYPE_44BSD:
		UFSD("ufstype=44bsd\n");
		uspi->s_fsize = block_size = 512;
		uspi->s_fmask = ~(512 - 1);
		uspi->s_fshift = 9;
		uspi->s_sbsize = super_block_size = 1536;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		break;
	case UFS_MOUNT_UFSTYPE_UFS2:
		UFSD("ufstype=ufs2\n");
		super_block_offset=SBLOCK_UFS2;
		uspi->s_fsize = block_size = 512;
		uspi->s_fmask = ~(512 - 1);
		uspi->s_fshift = 9;
		uspi->s_sbsize = super_block_size = 1536;
		uspi->s_sbbase =  0;
		flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		break;
		
	case UFS_MOUNT_UFSTYPE_SUN:
		UFSD("ufstype=sun\n");
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_SUNOS:
		UFSD(("ufstype=sunos\n"))
//.........这里部分代码省略.........

/*
 * Free 'count' fragments from fragment number 'fragment'
 */
void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	unsigned cgno, bit, end_bit, bbase, blkmap, i;
	u64 blkno;
	
	sb = inode->i_sb;
	uspi = UFS_SB(sb)->s_uspi;
	usb1 = ubh_get_usb_first(uspi);
	
	UFSD("ENTER, fragment %llu, count %u\n",
	     (unsigned long long)fragment, count);
	
	if (ufs_fragnum(fragment) + count > uspi->s_fpg)
		ufs_error (sb, "ufs_free_fragments", "internal error");
	
	lock_super(sb);
	
	cgno = ufs_dtog(uspi, fragment);
	bit = ufs_dtogd(uspi, fragment);
	if (cgno >= uspi->s_ncg) {
		ufs_panic (sb, "ufs_free_fragments", "freeing blocks are outside device");
		goto failed;
	}
		
	ucpi = ufs_load_cylinder (sb, cgno);
	if (!ucpi) 
		goto failed;
	ucg = ubh_get_ucg (UCPI_UBH(ucpi));
	if (!ufs_cg_chkmagic(sb, ucg)) {
		ufs_panic (sb, "ufs_free_fragments", "internal error, bad magic number on cg %u", cgno);
		goto failed;
	}

	end_bit = bit + count;
	bbase = ufs_blknum (bit);
	blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
	ufs_fragacct (sb, blkmap, ucg->cg_frsum, -1);
	for (i = bit; i < end_bit; i++) {
		if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, i))
			ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, i);
		else 
			ufs_error (sb, "ufs_free_fragments",
				   "bit already cleared for fragment %u", i);
	}
	
	fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
	uspi->cs_total.cs_nffree += count;
	fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
	blkmap = ubh_blkmap (UCPI_UBH(ucpi), ucpi->c_freeoff, bbase);
	ufs_fragacct(sb, blkmap, ucg->cg_frsum, 1);

	/*
	 * Trying to reassemble free fragments into block
	 */
	blkno = ufs_fragstoblks (bbase);
	if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno)) {
		fs32_sub(sb, &ucg->cg_cs.cs_nffree, uspi->s_fpb);
		uspi->cs_total.cs_nffree -= uspi->s_fpb;
		fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, uspi->s_fpb);
		if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
			ufs_clusteracct (sb, ucpi, blkno, 1);
		fs32_add(sb, &ucg->cg_cs.cs_nbfree, 1);
		uspi->cs_total.cs_nbfree++;
		fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nbfree, 1);
		if (uspi->fs_magic != UFS2_MAGIC) {
			unsigned cylno = ufs_cbtocylno (bbase);

			fs16_add(sb, &ubh_cg_blks(ucpi, cylno,
						  ufs_cbtorpos(bbase)), 1);
			fs32_add(sb, &ubh_cg_blktot(ucpi, cylno), 1);
		}
	}
	
	ubh_mark_buffer_dirty (USPI_UBH(uspi));
	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
	if (sb->s_flags & MS_SYNCHRONOUS) {
		ubh_ll_rw_block(SWRITE, UCPI_UBH(ucpi));
		ubh_wait_on_buffer (UCPI_UBH(ucpi));
	}
	sb->s_dirt = 1;
	
	unlock_super (sb);
	UFSD("EXIT\n");
	return;

failed:
	unlock_super (sb);
	UFSD("EXIT (FAILED)\n");
	return;
}

static int ufs_trunc_dindirect (struct inode *inode, unsigned offset, __fs32 *p)
{
    struct super_block * sb;
    struct ufs_sb_private_info * uspi;
    struct ufs_buffer_head * dind_bh;
    unsigned i, tmp, dindirect_block;
    __fs32 * dind;
    int retry = 0;

    UFSD("ENTER\n");

    sb = inode->i_sb;
    uspi = UFS_SB(sb)->s_uspi;

    dindirect_block = (DIRECT_BLOCK > offset)
                      ? ((DIRECT_BLOCK - offset) >> uspi->s_apbshift) : 0;
    retry = 0;

    tmp = fs32_to_cpu(sb, *p);
    if (!tmp)
        return 0;
    dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
    if (tmp != fs32_to_cpu(sb, *p)) {
        ubh_brelse (dind_bh);
        return 1;
    }
    if (!dind_bh) {
        *p = 0;
        return 0;
    }

    for (i = dindirect_block ; i < uspi->s_apb ; i++) {
        dind = ubh_get_addr32 (dind_bh, i);
        tmp = fs32_to_cpu(sb, *dind);
        if (!tmp)
            continue;
        retry |= ufs_trunc_indirect (inode, offset + (i << uspi->s_apbshift), dind);
        ubh_mark_buffer_dirty(dind_bh);
    }

    for (i = 0; i < uspi->s_apb; i++)
        if (*ubh_get_addr32 (dind_bh, i))
            break;
    if (i >= uspi->s_apb) {
        tmp = fs32_to_cpu(sb, *p);
        *p = 0;

        ufs_free_blocks(inode, tmp, uspi->s_fpb);
        mark_inode_dirty(inode);
        ubh_bforget(dind_bh);
        dind_bh = NULL;
    }
    if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh)) {
        ubh_ll_rw_block(SWRITE, dind_bh);
        ubh_wait_on_buffer (dind_bh);
    }
    ubh_brelse (dind_bh);

    UFSD("EXIT\n");

    return retry;
}

/*
 * 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 ufs_free_inode (struct inode * inode)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	int is_directory;
	unsigned ino, cg, bit;
	
	UFSD("ENTER, ino %lu\n", inode->i_ino);

	sb = inode->i_sb;
	uspi = UFS_SB(sb)->s_uspi;
	
	ino = inode->i_ino;

	mutex_lock(&UFS_SB(sb)->s_lock);

	if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
		ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return;
	}
	
	cg = ufs_inotocg (ino);
	bit = ufs_inotocgoff (ino);
	ucpi = ufs_load_cylinder (sb, cg);
	if (!ucpi) {
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return;
	}
	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
	if (!ufs_cg_chkmagic(sb, ucg))
		ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number");

	ucg->cg_time = cpu_to_fs32(sb, get_seconds());

	is_directory = S_ISDIR(inode->i_mode);

	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
		ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino);
	else {
		ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
		if (ino < ucpi->c_irotor)
			ucpi->c_irotor = ino;
		fs32_add(sb, &ucg->cg_cs.cs_nifree, 1);
		uspi->cs_total.cs_nifree++;
		fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1);

		if (is_directory) {
			fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1);
			uspi->cs_total.cs_ndir--;
			fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1);
		}
	}

	ubh_mark_buffer_dirty (USPI_UBH(uspi));
	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
	if (sb->s_flags & MS_SYNCHRONOUS)
		ubh_sync_block(UCPI_UBH(ucpi));
	
	ufs_mark_sb_dirty(sb);
	mutex_unlock(&UFS_SB(sb)->s_lock);
	UFSD("EXIT\n");
}

/*
 * Modify inode page cache in such way:
 * have - blocks with b_blocknr equal to oldb...oldb+count-1
 * get - blocks with b_blocknr equal to newb...newb+count-1
 * also we suppose that oldb...oldb+count-1 blocks
 * situated at the end of file.
 *
 * We can come here from ufs_writepage or ufs_prepare_write,
 * locked_page is argument of these functions, so we already lock it.
 */
static void ufs_change_blocknr(struct inode *inode, sector_t beg,
			       unsigned int count, sector_t oldb,
			       sector_t newb, struct page *locked_page)
{
	const unsigned blks_per_page =
		1 << (PAGE_CACHE_SHIFT - inode->i_blkbits);
	const unsigned mask = blks_per_page - 1;
	struct address_space * const mapping = inode->i_mapping;
	pgoff_t index, cur_index, last_index;
	unsigned pos, j, lblock;
	sector_t end, i;
	struct page *page;
	struct buffer_head *head, *bh;

	UFSD("ENTER, ino %lu, count %u, oldb %llu, newb %llu\n",
	      inode->i_ino, count,
	     (unsigned long long)oldb, (unsigned long long)newb);

	BUG_ON(!locked_page);
	BUG_ON(!PageLocked(locked_page));

	cur_index = locked_page->index;
	end = count + beg;
	last_index = end >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
	for (i = beg; i < end; i = (i | mask) + 1) {
		index = i >> (PAGE_CACHE_SHIFT - inode->i_blkbits);

		if (likely(cur_index != index)) {
			page = ufs_get_locked_page(mapping, index);
			if (!page)/* it was truncated */
				continue;
			if (IS_ERR(page)) {/* or EIO */
				ufs_error(inode->i_sb, __func__,
					  "read of page %llu failed\n",
					  (unsigned long long)index);
				continue;
			}
		} else
			page = locked_page;

		head = page_buffers(page);
		bh = head;
		pos = i & mask;
		for (j = 0; j < pos; ++j)
			bh = bh->b_this_page;


		if (unlikely(index == last_index))
			lblock = end & mask;
		else
			lblock = blks_per_page;

		do {
			if (j >= lblock)
				break;
			pos = (i - beg) + j;

			if (!buffer_mapped(bh))
					map_bh(bh, inode->i_sb, oldb + pos);
			if (!buffer_uptodate(bh)) {
				ll_rw_block(READ, 1, &bh);
				wait_on_buffer(bh);
				if (!buffer_uptodate(bh)) {
					ufs_error(inode->i_sb, __func__,
						  "read of block failed\n");
					break;
				}
			}

			UFSD(" change from %llu to %llu, pos %u\n",
			     (unsigned long long)(pos + oldb),
			     (unsigned long long)(pos + newb), pos);

			bh->b_blocknr = newb + pos;
			unmap_underlying_metadata(bh->b_bdev,
						  bh->b_blocknr);
			mark_buffer_dirty(bh);
			++j;
			bh = bh->b_this_page;
		} while (bh != head);

		if (likely(cur_index != index))
			ufs_put_locked_page(page);
 	}
	UFSD("EXIT\n");
}

static u64 ufs_alloccg_block(struct inode *inode,
			     struct ufs_cg_private_info *ucpi,
			     u64 goal, int *err)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_cylinder_group * ucg;
	u64 result, blkno;

	UFSD("ENTER, goal %llu\n", (unsigned long long)goal);

	sb = inode->i_sb;
	uspi = UFS_SB(sb)->s_uspi;
	usb1 = ubh_get_usb_first(uspi);
	ucg = ubh_get_ucg(UCPI_UBH(ucpi));

	if (goal == 0) {
		goal = ucpi->c_rotor;
		goto norot;
	}
	goal = ufs_blknum (goal);
	goal = ufs_dtogd(uspi, goal);
	
	/*
	 * If the requested block is available, use it.
	 */
	if (ubh_isblockset(UCPI_UBH(ucpi), ucpi->c_freeoff, ufs_fragstoblks(goal))) {
		result = goal;
		goto gotit;
	}
	
norot:	
	result = ufs_bitmap_search (sb, ucpi, goal, uspi->s_fpb);
	if (result == INVBLOCK)
		return INVBLOCK;
	ucpi->c_rotor = result;
gotit:
	blkno = ufs_fragstoblks(result);
	ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
	if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
		ufs_clusteracct (sb, ucpi, blkno, -1);
	if(DQUOT_ALLOC_BLOCK(inode, uspi->s_fpb)) {
		*err = -EDQUOT;
		return INVBLOCK;
	}

	fs32_sub(sb, &ucg->cg_cs.cs_nbfree, 1);
	uspi->cs_total.cs_nbfree--;
	fs32_sub(sb, &UFS_SB(sb)->fs_cs(ucpi->c_cgx).cs_nbfree, 1);

	if (uspi->fs_magic != UFS2_MAGIC) {
		unsigned cylno = ufs_cbtocylno((unsigned)result);

		fs16_sub(sb, &ubh_cg_blks(ucpi, cylno,
					  ufs_cbtorpos((unsigned)result)), 1);
		fs32_sub(sb, &ubh_cg_blktot(ucpi, cylno), 1);
	}
	
	UFSD("EXIT, result %llu\n", (unsigned long long)result);

	return result;
}

/*
 * 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 *ufs_new_inode(struct inode *dir, umode_t mode)
{
	struct super_block * sb;
	struct ufs_sb_info * sbi;
	struct ufs_sb_private_info * uspi;
	struct ufs_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	struct inode * inode;
	unsigned cg, bit, i, j, start;
	struct ufs_inode_info *ufsi;
	int err = -ENOSPC;

	UFSD("ENTER\n");
	
	/* 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);
	ufsi = UFS_I(inode);
	sbi = UFS_SB(sb);
	uspi = sbi->s_uspi;

	mutex_lock(&sbi->s_lock);

	/*
	 * Try to place the inode in its parent directory
	 */
	i = ufs_inotocg(dir->i_ino);
	if (sbi->fs_cs(i).cs_nifree) {
		cg = i;
		goto cg_found;
	}

	/*
	 * Use a quadratic hash to find a group with a free inode
	 */
	for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
		i += j;
		if (i >= uspi->s_ncg)
			i -= uspi->s_ncg;
		if (sbi->fs_cs(i).cs_nifree) {
			cg = i;
			goto cg_found;
		}
	}

	/*
	 * That failed: try linear search for a free inode
	 */
	i = ufs_inotocg(dir->i_ino) + 1;
	for (j = 2; j < uspi->s_ncg; j++) {
		i++;
		if (i >= uspi->s_ncg)
			i = 0;
		if (sbi->fs_cs(i).cs_nifree) {
			cg = i;
			goto cg_found;
		}
	}

	goto failed;

cg_found:
	ucpi = ufs_load_cylinder (sb, cg);
	if (!ucpi) {
		err = -EIO;
		goto failed;
	}
	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
	if (!ufs_cg_chkmagic(sb, ucg)) 
		ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");

	start = ucpi->c_irotor;
	bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start);
	if (!(bit < uspi->s_ipg)) {
		bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start);
		if (!(bit < start)) {
			ufs_error (sb, "ufs_new_inode",
			    "cylinder group %u corrupted - error in inode bitmap\n", cg);
			err = -EIO;
			goto failed;
		}
	}
	UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg);
	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
		ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
	else {
//.........这里部分代码省略.........

/*
 * Modify inode page cache in such way:
 * have - blocks with b_blocknr equal to oldb...oldb+count-1
 * get - blocks with b_blocknr equal to newb...newb+count-1
 * also we suppose that oldb...oldb+count-1 blocks
 * situated at the end of file.
 *
 * We can come here from ufs_writepage or ufs_prepare_write,
 * locked_page is argument of these functions, so we already lock it.
 */
static void ufs_change_blocknr(struct inode *inode, unsigned int beg,
			       unsigned int count, unsigned int oldb,
			       unsigned int newb, struct page *locked_page)
{
	const unsigned mask = (1 << (PAGE_CACHE_SHIFT - inode->i_blkbits)) - 1;
	struct address_space * const mapping = inode->i_mapping;
	pgoff_t index, cur_index;
	unsigned end, pos, j;
	struct page *page;
	struct buffer_head *head, *bh;

	UFSD("ENTER, ino %lu, count %u, oldb %u, newb %u\n",
	      inode->i_ino, count, oldb, newb);

	BUG_ON(!locked_page);
	BUG_ON(!PageLocked(locked_page));

	cur_index = locked_page->index;

	for (end = count + beg; beg < end; beg = (beg | mask) + 1) {
		index = beg >> (PAGE_CACHE_SHIFT - inode->i_blkbits);

		if (likely(cur_index != index)) {
			page = ufs_get_locked_page(mapping, index);
			if (!page || IS_ERR(page)) /* it was truncated or EIO */
				continue;
		} else
			page = locked_page;

		head = page_buffers(page);
		bh = head;
		pos = beg & mask;
		for (j = 0; j < pos; ++j)
			bh = bh->b_this_page;
		j = 0;
		do {
			if (buffer_mapped(bh)) {
				pos = bh->b_blocknr - oldb;
				if (pos < count) {
					UFSD(" change from %llu to %llu\n",
					     (unsigned long long)pos + oldb,
					     (unsigned long long)pos + newb);
					bh->b_blocknr = newb + pos;
					unmap_underlying_metadata(bh->b_bdev,
								  bh->b_blocknr);
					mark_buffer_dirty(bh);
					++j;
				}
			}

			bh = bh->b_this_page;
		} while (bh != head);

		if (j)
			set_page_dirty(page);

		if (likely(cur_index != index))
			ufs_put_locked_page(page);
 	}
	UFSD("EXIT\n");
}

/*
 * Read on-disk structures associated with cylinder groups
 */
static int ufs_read_cylinder_structures(struct super_block *sb)
{
    struct ufs_sb_info *sbi = UFS_SB(sb);
    struct ufs_sb_private_info *uspi = sbi->s_uspi;
    unsigned flags = sbi->s_flags;
    struct ufs_buffer_head * ubh;
    unsigned char * base, * space;
    unsigned size, blks, i;
    struct ufs_super_block_third *usb3;

    UFSD("ENTER\n");

    usb3 = ubh_get_usb_third(uspi);
    /*
     * Read cs structures from (usually) first data block
     * on the device.
     */
    size = uspi->s_cssize;
    blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
    base = space = kmalloc(size, GFP_KERNEL);
    if (!base)
        goto failed;
    sbi->s_csp = (struct ufs_csum *)space;
    for (i = 0; i < blks; i += uspi->s_fpb) {
        size = uspi->s_bsize;
        if (i + uspi->s_fpb > blks)
            size = (blks - i) * uspi->s_fsize;

        if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
            ubh = ubh_bread(sb,
                            fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size);
        else
            ubh = ubh_bread(sb, uspi->s_csaddr + i, size);

        if (!ubh)
            goto failed;

        ubh_ubhcpymem (space, ubh, size);

        space += size;
        ubh_brelse (ubh);
        ubh = NULL;
    }

    /*
     * Read cylinder group (we read only first fragment from block
     * at this time) and prepare internal data structures for cg caching.
     */
    if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
        goto failed;
    for (i = 0; i < uspi->s_ncg; i++)
        sbi->s_ucg[i] = NULL;
    for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
        sbi->s_ucpi[i] = NULL;
        sbi->s_cgno[i] = UFS_CGNO_EMPTY;
    }
    for (i = 0; i < uspi->s_ncg; i++) {
        UFSD("read cg %u\n", i);
        if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
            goto failed;
        if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
            goto failed;

        ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
    }
    for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
        if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
            goto failed;
        sbi->s_cgno[i] = UFS_CGNO_EMPTY;
    }
    sbi->s_cg_loaded = 0;
    UFSD("EXIT\n");
    return 1;

failed:
    kfree (base);
    if (sbi->s_ucg) {
        for (i = 0; i < uspi->s_ncg; i++)
            if (sbi->s_ucg[i])
                brelse (sbi->s_ucg[i]);
        kfree (sbi->s_ucg);
        for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
            kfree (sbi->s_ucpi[i]);
    }
    UFSD("EXIT (FAILED)\n");
    return 0;
}

static int ufs_trunc_direct (struct inode * inode)
{
    struct ufs_inode_info *ufsi = UFS_I(inode);
    struct super_block * sb;
    struct ufs_sb_private_info * uspi;
    __fs32 * p;
    unsigned frag1, frag2, frag3, frag4, block1, block2;
    unsigned frag_to_free, free_count;
    unsigned i, tmp;
    int retry;

    UFSD("ENTER\n");

    sb = inode->i_sb;
    uspi = UFS_SB(sb)->s_uspi;

    frag_to_free = 0;
    free_count = 0;
    retry = 0;

    frag1 = DIRECT_FRAGMENT;
    frag4 = min_t(u32, UFS_NDIR_FRAGMENT, ufsi->i_lastfrag);
    frag2 = ((frag1 & uspi->s_fpbmask) ? ((frag1 | uspi->s_fpbmask) + 1) : frag1);
    frag3 = frag4 & ~uspi->s_fpbmask;
    block1 = block2 = 0;
    if (frag2 > frag3) {
        frag2 = frag4;
        frag3 = frag4 = 0;
    }
    else if (frag2 < frag3) {
        block1 = ufs_fragstoblks (frag2);
        block2 = ufs_fragstoblks (frag3);
    }

    UFSD("frag1 %u, frag2 %u, block1 %u, block2 %u, frag3 %u, frag4 %u\n", frag1, frag2, block1, block2, frag3, frag4);

    if (frag1 >= frag2)
        goto next1;

    /*
     * Free first free fragments
     */
    p = ufsi->i_u1.i_data + ufs_fragstoblks (frag1);
    tmp = fs32_to_cpu(sb, *p);
    if (!tmp )
        ufs_panic (sb, "ufs_trunc_direct", "internal error");
    frag1 = ufs_fragnum (frag1);
    frag2 = ufs_fragnum (frag2);

    ufs_free_fragments (inode, tmp + frag1, frag2 - frag1);
    mark_inode_dirty(inode);
    frag_to_free = tmp + frag1;

next1:
    /*
     * Free whole blocks
     */
    for (i = block1 ; i < block2; i++) {
        p = ufsi->i_u1.i_data + i;
        tmp = fs32_to_cpu(sb, *p);
        if (!tmp)
            continue;

        *p = 0;

        if (free_count == 0) {
            frag_to_free = tmp;
            free_count = uspi->s_fpb;
        } else if (free_count > 0 && frag_to_free == tmp - free_count)
            free_count += uspi->s_fpb;
        else {
            ufs_free_blocks (inode, frag_to_free, free_count);
            frag_to_free = tmp;
            free_count = uspi->s_fpb;
        }
        mark_inode_dirty(inode);
    }

    if (free_count > 0)
        ufs_free_blocks (inode, frag_to_free, free_count);

    if (frag3 >= frag4)
        goto next3;

    /*
     * Free last free fragments
     */
    p = ufsi->i_u1.i_data + ufs_fragstoblks (frag3);
    tmp = fs32_to_cpu(sb, *p);
    if (!tmp )
        ufs_panic(sb, "ufs_truncate_direct", "internal error");
    frag4 = ufs_fragnum (frag4);

    *p = 0;

    ufs_free_fragments (inode, tmp, frag4);
    mark_inode_dirty(inode);
next3:

    UFSD("EXIT\n");
//.........这里部分代码省略.........

static u64 ufs_alloc_fragments(struct inode *inode, unsigned cgno,
			       u64 goal, unsigned count, int *err)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	unsigned oldcg, i, j, k, allocsize;
	u64 result;
	
	UFSD("ENTER, ino %lu, cgno %u, goal %llu, count %u\n",
	     inode->i_ino, cgno, (unsigned long long)goal, count);

	sb = inode->i_sb;
	uspi = UFS_SB(sb)->s_uspi;
	oldcg = cgno;
	
	/*
	 * 1. searching on preferred cylinder group
	 */
	UFS_TEST_FREE_SPACE_CG

	/*
	 * 2. quadratic rehash
	 */
	for (j = 1; j < uspi->s_ncg; j *= 2) {
		cgno += j;
		if (cgno >= uspi->s_ncg) 
			cgno -= uspi->s_ncg;
		UFS_TEST_FREE_SPACE_CG
	}

	/*
	 * 3. brute force search
	 * We start at i = 2 ( 0 is checked at 1.step, 1 at 2.step )
	 */
	cgno = (oldcg + 1) % uspi->s_ncg;
	for (j = 2; j < uspi->s_ncg; j++) {
		cgno++;
		if (cgno >= uspi->s_ncg)
			cgno = 0;
		UFS_TEST_FREE_SPACE_CG
	}
	
	UFSD("EXIT (FAILED)\n");
	return 0;

cg_found:
	ucpi = ufs_load_cylinder (sb, cgno);
	if (!ucpi)
		return 0;
	ucg = ubh_get_ucg (UCPI_UBH(ucpi));
	if (!ufs_cg_chkmagic(sb, ucg)) 
		ufs_panic (sb, "ufs_alloc_fragments",
			"internal error, bad magic number on cg %u", cgno);
	ucg->cg_time = cpu_to_fs32(sb, get_seconds());

	if (count == uspi->s_fpb) {
		result = ufs_alloccg_block (inode, ucpi, goal, err);
		if (result == INVBLOCK)
			return 0;
		goto succed;
	}

	for (allocsize = count; allocsize < uspi->s_fpb; allocsize++)
		if (fs32_to_cpu(sb, ucg->cg_frsum[allocsize]) != 0)
			break;
	
	if (allocsize == uspi->s_fpb) {
		result = ufs_alloccg_block (inode, ucpi, goal, err);
		if (result == INVBLOCK)
			return 0;
		goal = ufs_dtogd(uspi, result);
		for (i = count; i < uspi->s_fpb; i++)
			ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
		i = uspi->s_fpb - count;

		fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
		uspi->cs_total.cs_nffree += i;
		fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
		fs32_add(sb, &ucg->cg_frsum[i], 1);
		goto succed;
	}

	result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
	if (result == INVBLOCK)
		return 0;
	for (i = 0; i < count; i++)
		ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
	
	fs32_sub(sb, &ucg->cg_cs.cs_nffree, count);
	uspi->cs_total.cs_nffree -= count;
	fs32_sub(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
	fs32_sub(sb, &ucg->cg_frsum[allocsize], 1);

	if (count != allocsize)
		fs32_add(sb, &ucg->cg_frsum[allocsize - count], 1);

succed:
	ubh_mark_buffer_dirty (USPI_UBH(uspi));
//.........这里部分代码省略.........

static int ufs_trunc_indirect(struct inode *inode, u64 offset, void *p)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_buffer_head * ind_ubh;
	void *ind;
	u64 tmp, indirect_block, i, frag_to_free;
	unsigned free_count;
	int retry;

	UFSD("ENTER: ino %lu, offset %llu, p: %p\n",
	     inode->i_ino, (unsigned long long)offset, p);

	BUG_ON(!p);
		
	sb = inode->i_sb;
	uspi = UFS_SB(sb)->s_uspi;

	frag_to_free = 0;
	free_count = 0;
	retry = 0;
	
	tmp = ufs_data_ptr_to_cpu(sb, p);
	if (!tmp)
		return 0;
	ind_ubh = ubh_bread(sb, tmp, uspi->s_bsize);
	if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
		ubh_brelse (ind_ubh);
		return 1;
	}
	if (!ind_ubh) {
		ufs_data_ptr_clear(uspi, p);
		return 0;
	}

	indirect_block = (DIRECT_BLOCK > offset) ? (DIRECT_BLOCK - offset) : 0;
	for (i = indirect_block; i < uspi->s_apb; i++) {
		ind = ubh_get_data_ptr(uspi, ind_ubh, i);
		tmp = ufs_data_ptr_to_cpu(sb, ind);
		if (!tmp)
			continue;

		ufs_data_ptr_clear(uspi, ind);
		ubh_mark_buffer_dirty(ind_ubh);
		if (free_count == 0) {
			frag_to_free = tmp;
			free_count = uspi->s_fpb;
		} else if (free_count > 0 && frag_to_free == tmp - free_count)
			free_count += uspi->s_fpb;
		else {
			ufs_free_blocks (inode, frag_to_free, free_count);
			frag_to_free = tmp;
			free_count = uspi->s_fpb;
		}

		mark_inode_dirty(inode);
	}

	if (free_count > 0) {
		ufs_free_blocks (inode, frag_to_free, free_count);
	}
	for (i = 0; i < uspi->s_apb; i++)
		if (!ufs_is_data_ptr_zero(uspi,
					  ubh_get_data_ptr(uspi, ind_ubh, i)))
			break;
	if (i >= uspi->s_apb) {
		tmp = ufs_data_ptr_to_cpu(sb, p);
		ufs_data_ptr_clear(uspi, p);

		ufs_free_blocks (inode, tmp, uspi->s_fpb);
		mark_inode_dirty(inode);
		ubh_bforget(ind_ubh);
		ind_ubh = NULL;
	}
	if (IS_SYNC(inode) && ind_ubh && ubh_buffer_dirty(ind_ubh))
		ubh_sync_block(ind_ubh);
	ubh_brelse (ind_ubh);
	
	UFSD("EXIT: ino %lu\n", inode->i_ino);
	
	return retry;
}