Esempio n. 1
0
static int ufs_trunc_tindirect(struct inode *inode)
{
	struct super_block *sb = inode->i_sb;
	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
	struct ufs_inode_info *ufsi = UFS_I(inode);
	struct ufs_buffer_head * tind_bh;
	u64 tindirect_block, tmp, i;
	void *tind, *p;
	int retry;
	
	UFSD("ENTER: ino %lu\n", inode->i_ino);

	retry = 0;
	
	tindirect_block = (DIRECT_BLOCK > (UFS_NDADDR + uspi->s_apb + uspi->s_2apb))
		? ((DIRECT_BLOCK - UFS_NDADDR - uspi->s_apb - uspi->s_2apb) >> uspi->s_2apbshift) : 0;

	p = ufs_get_direct_data_ptr(uspi, ufsi, UFS_TIND_BLOCK);
	if (!(tmp = ufs_data_ptr_to_cpu(sb, p)))
		return 0;
	tind_bh = ubh_bread (sb, tmp, uspi->s_bsize);
	if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
		ubh_brelse (tind_bh);
		return 1;
	}
	if (!tind_bh) {
		ufs_data_ptr_clear(uspi, p);
		return 0;
	}

	for (i = tindirect_block ; i < uspi->s_apb ; i++) {
		tind = ubh_get_data_ptr(uspi, tind_bh, i);
		retry |= ufs_trunc_dindirect(inode, UFS_NDADDR + 
			uspi->s_apb + ((i + 1) << uspi->s_2apbshift), tind);
		ubh_mark_buffer_dirty(tind_bh);
	}
	for (i = 0; i < uspi->s_apb; i++)
		if (!ufs_is_data_ptr_zero(uspi,
					  ubh_get_data_ptr(uspi, tind_bh, 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(tind_bh);
		tind_bh = NULL;
	}
	if (IS_SYNC(inode) && tind_bh && ubh_buffer_dirty(tind_bh)) {
		ubh_ll_rw_block(SWRITE, tind_bh);
		ubh_wait_on_buffer (tind_bh);
	}
	ubh_brelse (tind_bh);
	
	UFSD("EXIT: ino %lu\n", inode->i_ino);
	return retry;
}
Esempio n. 2
0
static int ufs_trunc_dindirect(struct inode *inode, u64 offset, void *p)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_buffer_head *dind_bh;
	u64 i, tmp, dindirect_block;
	void *dind;
	int retry = 0;
	
	UFSD("ENTER: ino %lu\n", inode->i_ino);
	
	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 = ufs_data_ptr_to_cpu(sb, p);
	if (!tmp)
		return 0;
	dind_bh = ubh_bread(sb, tmp, uspi->s_bsize);
	if (tmp != ufs_data_ptr_to_cpu(sb, p)) {
		ubh_brelse (dind_bh);
		return 1;
	}
	if (!dind_bh) {
		ufs_data_ptr_clear(uspi, p);
		return 0;
	}

	for (i = dindirect_block ; i < uspi->s_apb ; i++) {
		dind = ubh_get_data_ptr(uspi, dind_bh, i);
		tmp = ufs_data_ptr_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 (!ufs_is_data_ptr_zero(uspi,
					  ubh_get_data_ptr(uspi, dind_bh, 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(dind_bh);
		dind_bh = NULL;
	}
	if (IS_SYNC(inode) && dind_bh && ubh_buffer_dirty(dind_bh))
		ubh_sync_block(dind_bh);
	ubh_brelse (dind_bh);
	
	UFSD("EXIT: ino %lu\n", inode->i_ino);
	
	return retry;
}
Esempio n. 3
0
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;
}