LXR linux/fs/udf/ialloc.c

   1/*
   2 * ialloc.c
   3 *
   4 * PURPOSE
   5 *      Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
   6 *
   7 * COPYRIGHT
   8 *      This file is distributed under the terms of the GNU General Public
   9 *      License (GPL). Copies of the GPL can be obtained from:
  10 *              ftp://prep.ai.mit.edu/pub/gnu/GPL
  11 *      Each contributing author retains all rights to their own work.
  12 *
  13 *  (C) 1998-2001 Ben Fennema
  14 *
  15 * HISTORY
  16 *
  17 *  02/24/99 blf  Created.
  18 *
  19 */
  20
  21#include "udfdecl.h"
  22#include <linux/fs.h>
  23#include <linux/sched.h>
  24#include <linux/slab.h>
  25
  26#include "udf_i.h"
  27#include "udf_sb.h"
  28
  29void udf_free_inode(struct inode *inode)
  30{
  31        struct super_block *sb = inode->i_sb;
  32        struct udf_sb_info *sbi = UDF_SB(sb);
  33
  34        mutex_lock(&sbi->s_alloc_mutex);
  35        if (sbi->s_lvid_bh) {
  36                struct logicalVolIntegrityDescImpUse *lvidiu =
  37                                                        udf_sb_lvidiu(sbi);
  38                if (S_ISDIR(inode->i_mode))
  39                        le32_add_cpu(&lvidiu->numDirs, -1);
  40                else
  41                        le32_add_cpu(&lvidiu->numFiles, -1);
  42                udf_updated_lvid(sb);
  43        }
  44        mutex_unlock(&sbi->s_alloc_mutex);
  45
  46        udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
  47}
  48
  49struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
  50{
  51        struct super_block *sb = dir->i_sb;
  52        struct udf_sb_info *sbi = UDF_SB(sb);
  53        struct inode *inode;
  54        int block;
  55        uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
  56        struct udf_inode_info *iinfo;
  57        struct udf_inode_info *dinfo = UDF_I(dir);
  58
  59        inode = new_inode(sb);
  60
  61        if (!inode) {
  62                *err = -ENOMEM;
  63                return NULL;
  64        }
  65        *err = -ENOSPC;
  66
  67        iinfo = UDF_I(inode);
  68        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
  69                iinfo->i_efe = 1;
  70                if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
  71                        sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
  72                iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
  73                                            sizeof(struct extendedFileEntry),
  74                                            GFP_KERNEL);
  75        } else {
  76                iinfo->i_efe = 0;
  77                iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
  78                                            sizeof(struct fileEntry),
  79                                            GFP_KERNEL);
  80        }
  81        if (!iinfo->i_ext.i_data) {
  82                iput(inode);
  83                *err = -ENOMEM;
  84                return NULL;
  85        }
  86
  87        block = udf_new_block(dir->i_sb, NULL,
  88                              dinfo->i_location.partitionReferenceNum,
  89                              start, err);
  90        if (*err) {
  91                iput(inode);
  92                return NULL;
  93        }
  94
  95        if (sbi->s_lvid_bh) {
  96                struct logicalVolIntegrityDescImpUse *lvidiu;
  97
  98                iinfo->i_unique = lvid_get_unique_id(sb);
  99                mutex_lock(&sbi->s_alloc_mutex);
 100                lvidiu = udf_sb_lvidiu(sbi);
 101                if (S_ISDIR(mode))
 102                        le32_add_cpu(&lvidiu->numDirs, 1);
 103                else
 104                        le32_add_cpu(&lvidiu->numFiles, 1);
 105                udf_updated_lvid(sb);
 106                mutex_unlock(&sbi->s_alloc_mutex);
 107        }
 108
 109        inode_init_owner(inode, dir, mode);
 110
 111        iinfo->i_location.logicalBlockNum = block;
 112        iinfo->i_location.partitionReferenceNum =
 113                                dinfo->i_location.partitionReferenceNum;
 114        inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
 115        inode->i_blocks = 0;
 116        iinfo->i_lenEAttr = 0;
 117        iinfo->i_lenAlloc = 0;
 118        iinfo->i_use = 0;
 119        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 120                iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 121        else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
 122                iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
 123        else
 124                iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
 125        inode->i_mtime = inode->i_atime = inode->i_ctime =
 126                iinfo->i_crtime = current_fs_time(inode->i_sb);
 127        insert_inode_hash(inode);
 128        mark_inode_dirty(inode);
 129
 130        *err = 0;
 131        return inode;
 132}
 133