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        struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
  34
  35        if (lvidiu) {
  36                mutex_lock(&sbi->s_alloc_mutex);
  37                if (S_ISDIR(inode->i_mode))
  38                        le32_add_cpu(&lvidiu->numDirs, -1);
  39                else
  40                        le32_add_cpu(&lvidiu->numFiles, -1);
  41                udf_updated_lvid(sb);
  42                mutex_unlock(&sbi->s_alloc_mutex);
  43        }
  44
  45        udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
  46}
  47
  48struct inode *udf_new_inode(struct inode *dir, umode_t mode)
  49{
  50        struct super_block *sb = dir->i_sb;
  51        struct udf_sb_info *sbi = UDF_SB(sb);
  52        struct inode *inode;
  53        int block;
  54        uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
  55        struct udf_inode_info *iinfo;
  56        struct udf_inode_info *dinfo = UDF_I(dir);
  57        struct logicalVolIntegrityDescImpUse *lvidiu;
  58        int err;
  59
  60        inode = new_inode(sb);
  61
  62        if (!inode)
  63                return ERR_PTR(-ENOMEM);
  64
  65        iinfo = UDF_I(inode);
  66        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
  67                iinfo->i_efe = 1;
  68                if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
  69                        sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
  70                iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
  71                                            sizeof(struct extendedFileEntry),
  72                                            GFP_KERNEL);
  73        } else {
  74                iinfo->i_efe = 0;
  75                iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
  76                                            sizeof(struct fileEntry),
  77                                            GFP_KERNEL);
  78        }
  79        if (!iinfo->i_ext.i_data) {
  80                iput(inode);
  81                return ERR_PTR(-ENOMEM);
  82        }
  83
  84        err = -ENOSPC;
  85        block = udf_new_block(dir->i_sb, NULL,
  86                              dinfo->i_location.partitionReferenceNum,
  87                              start, &err);
  88        if (err) {
  89                iput(inode);
  90                return ERR_PTR(err);
  91        }
  92
  93        lvidiu = udf_sb_lvidiu(sb);
  94        if (lvidiu) {
  95                iinfo->i_unique = lvid_get_unique_id(sb);
  96                inode->i_generation = iinfo->i_unique;
  97                mutex_lock(&sbi->s_alloc_mutex);
  98                if (S_ISDIR(mode))
  99                        le32_add_cpu(&lvidiu->numDirs, 1);
 100                else
 101                        le32_add_cpu(&lvidiu->numFiles, 1);
 102                udf_updated_lvid(sb);
 103                mutex_unlock(&sbi->s_alloc_mutex);
 104        }
 105
 106        inode_init_owner(inode, dir, mode);
 107
 108        iinfo->i_location.logicalBlockNum = block;
 109        iinfo->i_location.partitionReferenceNum =
 110                                dinfo->i_location.partitionReferenceNum;
 111        inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
 112        inode->i_blocks = 0;
 113        iinfo->i_lenEAttr = 0;
 114        iinfo->i_lenAlloc = 0;
 115        iinfo->i_use = 0;
 116        iinfo->i_checkpoint = 1;
 117        if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 118                iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 119        else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
 120                iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
 121        else
 122                iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
 123        inode->i_mtime = inode->i_atime = inode->i_ctime =
 124                iinfo->i_crtime = current_fs_time(inode->i_sb);
 125        if (unlikely(insert_inode_locked(inode) < 0)) {
 126                make_bad_inode(inode);
 127                iput(inode);
 128                return ERR_PTR(-EIO);
 129        }
 130        mark_inode_dirty(inode);
 131
 132        return inode;
 133}
 134