/* * ialloc.c * * PURPOSE *	Inode allocation handling routines for the OSTA-UDF(tm) filesystem. * * COPYRIGHT *	This file is distributed under the terms of the GNU General Public *	License (GPL). Copies of the GPL can be obtained from: *		ftp://prep.ai.mit.edu/pub/gnu/GPL *	Each contributing author retains all rights to their own work. * *  (C) 1998-2001 Ben Fennema * * HISTORY * *  02/24/99 blf  Created. * */ #include "udfdecl.h"#include <linux/fs.h>#include <linux/sched.h>#include <linux/slab.h> #include "udf_i.h"#include "udf_sb.h" void udf_free_inode(struct inode *inode){	struct super_block *sb = inode->i_sb;	struct udf_sb_info *sbi = UDF_SB(sb);	struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb); 	if (lvidiu) {		mutex_lock(&sbi->s_alloc_mutex);		if (S_ISDIR(inode->i_mode))			le32_add_cpu(&lvidiu->numDirs, -1);		else			le32_add_cpu(&lvidiu->numFiles, -1);		udf_updated_lvid(sb);		mutex_unlock(&sbi->s_alloc_mutex);	} 	udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);} struct inode *udf_new_inode(struct inode *dir, umode_t mode){	struct super_block *sb = dir->i_sb;	struct udf_sb_info *sbi = UDF_SB(sb);	struct inode *inode;	int block;	uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;	struct udf_inode_info *iinfo;	struct udf_inode_info *dinfo = UDF_I(dir);	struct logicalVolIntegrityDescImpUse *lvidiu;	int err; 	inode = new_inode(sb); 	if (!inode)		return ERR_PTR(-ENOMEM); 	iinfo = UDF_I(inode);	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {		iinfo->i_efe = 1;		if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)			sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;		iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -					    sizeof(struct extendedFileEntry),					    GFP_KERNEL);	} else {		iinfo->i_efe = 0;		iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -					    sizeof(struct fileEntry),					    GFP_KERNEL);	}	if (!iinfo->i_ext.i_data) {		iput(inode);		return ERR_PTR(-ENOMEM);	} 	err = -ENOSPC;	block = udf_new_block(dir->i_sb, NULL,			      dinfo->i_location.partitionReferenceNum,			      start, &err);	if (err) {		iput(inode);		return ERR_PTR(err);	} 	lvidiu = udf_sb_lvidiu(sb);	if (lvidiu) {		iinfo->i_unique = lvid_get_unique_id(sb);		inode->i_generation = iinfo->i_unique;		mutex_lock(&sbi->s_alloc_mutex);		if (S_ISDIR(mode))			le32_add_cpu(&lvidiu->numDirs, 1);		else			le32_add_cpu(&lvidiu->numFiles, 1);		udf_updated_lvid(sb);		mutex_unlock(&sbi->s_alloc_mutex);	} 	inode_init_owner(inode, dir, mode); 	iinfo->i_location.logicalBlockNum = block;	iinfo->i_location.partitionReferenceNum =				dinfo->i_location.partitionReferenceNum;	inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);	inode->i_blocks = 0;	iinfo->i_lenEAttr = 0;	iinfo->i_lenAlloc = 0;	iinfo->i_use = 0;	iinfo->i_checkpoint = 1;	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))		iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;	else		iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;	inode->i_mtime = inode->i_atime = inode->i_ctime =		iinfo->i_crtime = current_time(inode);	if (unlikely(insert_inode_locked(inode) < 0)) {		make_bad_inode(inode);		iput(inode);		return ERR_PTR(-EIO);	}	mark_inode_dirty(inode); 	return inode;}