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
  29 void udf_free_inode(struct inode *inode)
  30 {
  31         udf_free_blocks(inode->i_sb, NULL, &UDF_I(inode)->i_location, 0, 1);
  32 }
  33
  34 struct inode *udf_new_inode(struct inode *dir, umode_t mode)
  35 {
  36         struct super_block *sb = dir->i_sb;
  37         struct udf_sb_info *sbi = UDF_SB(sb);
  38         struct inode *inode;
  39         udf_pblk_t block;
  40         uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
  41         struct udf_inode_info *iinfo;
  42         struct udf_inode_info *dinfo = UDF_I(dir);
  43         int err;
  44
  45         inode = new_inode(sb);
  46
  47         if (!inode)
  48                 return ERR_PTR(-ENOMEM);
  49
  50         iinfo = UDF_I(inode);
  51         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
  52                 iinfo->i_efe = 1;
  53                 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
  54                         sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
  55                 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
  56                                         sizeof(struct extendedFileEntry),
  57                                         GFP_KERNEL);
  58         } else {
  59                 iinfo->i_efe = 0;
  60                 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
  61                                         sizeof(struct fileEntry),
  62                                         GFP_KERNEL);
  63         }
  64         if (!iinfo->i_data) {
  65                 make_bad_inode(inode);
  66                 iput(inode);
  67                 return ERR_PTR(-ENOMEM);
  68         }
  69
  70         err = -ENOSPC;
  71         block = udf_new_block(dir->i_sb, NULL,
  72                               dinfo->i_location.partitionReferenceNum,
  73                               start, &err);
  74         if (err) {
  75                 make_bad_inode(inode);
  76                 iput(inode);
  77                 return ERR_PTR(err);
  78         }
  79
  80         iinfo->i_unique = lvid_get_unique_id(sb);
  81         inode->i_generation = iinfo->i_unique;
  82
  83         inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
  84         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
  85                 inode->i_uid = sbi->s_uid;
  86         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
  87                 inode->i_gid = sbi->s_gid;
  88
  89         iinfo->i_location.logicalBlockNum = block;
  90         iinfo->i_location.partitionReferenceNum =
  91                                 dinfo->i_location.partitionReferenceNum;
  92         inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
  93         inode->i_blocks = 0;
  94         iinfo->i_lenEAttr = 0;
  95         iinfo->i_lenAlloc = 0;
  96         iinfo->i_use = 0;
  97         iinfo->i_checkpoint = 1;
  98         iinfo->i_extraPerms = FE_PERM_U_CHATTR;
  99         udf_update_extra_perms(inode, mode);
 100
 101         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 102                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 103         else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
 104                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
 105         else
 106                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
 107         inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 108         iinfo->i_crtime = inode->i_mtime;
 109         if (unlikely(insert_inode_locked(inode) < 0)) {
 110                 make_bad_inode(inode);
 111                 iput(inode);
 112                 return ERR_PTR(-EIO);
 113         }
 114         mark_inode_dirty(inode);
 115
 116         return inode;
 117 }