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/*

 * ialloc.c

 *

 * PURPOSE

 *      Inode allocation handling routines for the OSTA-UDF(tm) filesystem.

 *

 * CONTACTS

 *      E-mail regarding any portion of the Linux UDF file system should be

 *      directed to the development team mailing list (run by majordomo):

 *              linux_udf@hpesjro.fc.hp.com

 *

 * 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/locks.h>

#include <linux/quotaops.h>

#include <linux/udf_fs.h>

#include "udf_i.h"

#include "udf_sb.h"

void udf_free_inode(struct inode * inode)

{

        struct super_block * sb = inode->i_sb;

        int is_directory;

        unsigned long ino;

        ino = inode->i_ino;

        /*

         * Note: we must free any quota before locking the superblock,

         * as writing the quota to disk may need the lock as well.

         */

        DQUOT_FREE_INODE(inode);

        DQUOT_DROP(inode);

        lock_super(sb);

        is_directory = S_ISDIR(inode->i_mode);

        clear_inode(inode);

        if (UDF_SB_LVIDBH(sb))

        {

                if (is_directory)

                        UDF_SB_LVIDIU(sb)->numDirs =

                                cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) - 1);

                else

                        UDF_SB_LVIDIU(sb)->numFiles =

                                cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1);

                mark_buffer_dirty(UDF_SB_LVIDBH(sb));

        }

        unlock_super(sb);

        udf_free_blocks(sb, NULL, UDF_I_LOCATION(inode), 0, 1);

}

struct inode * udf_new_inode (struct inode *dir, int mode, int * err)

{

        struct super_block *sb;

        struct inode * inode;

        int block;

        uint32_t start = UDF_I_LOCATION(dir).logicalBlockNum;

        sb = dir->i_sb;

        inode = new_inode(sb);

        if (!inode)

        {

                *err = -ENOMEM;

                return NULL;

        }

        *err = -ENOSPC;

        block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum,

                start, err);

        if (*err)

        {

                iput(inode);

                return NULL;

        }

        lock_super(sb);

        if (UDF_SB_LVIDBH(sb))

        {

                struct logicalVolHeaderDesc *lvhd;

                uint64_t uniqueID;

                lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse);

                if (S_ISDIR(mode))

                        UDF_SB_LVIDIU(sb)->numDirs =

                                cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1);

                else

                        UDF_SB_LVIDIU(sb)->numFiles =

                                cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1);

                UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID);

                if (!(++uniqueID & 0x00000000FFFFFFFFUL))

                        uniqueID += 16;

                lvhd->uniqueID = cpu_to_le64(uniqueID);

                mark_buffer_dirty(UDF_SB_LVIDBH(sb));

        }

        inode->i_mode = mode;

        inode->i_uid = current->fsuid;

        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;

        UDF_I_LOCATION(inode).logicalBlockNum = block;

        UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;

        inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0);

        inode->i_blksize = PAGE_SIZE;

        inode->i_blocks = 0;

        UDF_I_LENEATTR(inode) = 0;

        UDF_I_LENALLOC(inode) = 0;

        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE))

        {

                UDF_I_EXTENDED_FE(inode) = 1;

                UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE);

        }

        else

                UDF_I_EXTENDED_FE(inode) = 0;

        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))

                UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB;

        else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))

                UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT;

        else

                UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG;

        inode->i_mtime = inode->i_atime = inode->i_ctime =

                UDF_I_CRTIME(inode) = CURRENT_TIME;

        UDF_I_UMTIME(inode) = UDF_I_UCTIME(inode) =

                UDF_I_UCRTIME(inode) = CURRENT_UTIME;

        UDF_I_NEW_INODE(inode) = 1;

        insert_inode_hash(inode);

        mark_inode_dirty(inode);

        unlock_super(sb);

        if (DQUOT_ALLOC_INODE(inode))

        {

                DQUOT_DROP(inode);

                inode->i_flags |= S_NOQUOTA;

                inode->i_nlink = 0;

                iput(inode);

                *err = -EDQUOT;

                return NULL;

        }

        *err = 0;

        return inode;

}