fs/udf/ialloc.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ialloc.c
   4  *
   5  * PURPOSE
   6  *      Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
   7  *
   8  * COPYRIGHT
   9  *  (C) 1998-2001 Ben Fennema
  10  *
  11  * HISTORY
  12  *
  13  *  02/24/99 blf  Created.
  14  *
  15  */
  16
  17 #include "udfdecl.h"
  18 #include <linux/fs.h>
  19 #include <linux/sched.h>
  20 #include <linux/slab.h>
  21
  22 #include "udf_i.h"
  23 #include "udf_sb.h"
  24
  25 void udf_free_inode(struct inode *inode)
  26 {
  27         udf_free_blocks(inode->i_sb, NULL, &UDF_I(inode)->i_location, 0, 1);
  28 }
  29
  30 struct inode *udf_new_inode(struct inode *dir, umode_t mode)
  31 {
  32         struct super_block *sb = dir->i_sb;
  33         struct udf_sb_info *sbi = UDF_SB(sb);
  34         struct inode *inode;
  35         udf_pblk_t block;
  36         uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
  37         struct udf_inode_info *iinfo;
  38         struct udf_inode_info *dinfo = UDF_I(dir);
  39         int err;
  40
  41         inode = new_inode(sb);
  42
  43         if (!inode)
  44                 return ERR_PTR(-ENOMEM);
  45
  46         iinfo = UDF_I(inode);
  47         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
  48                 iinfo->i_efe = 1;
  49                 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
  50                         sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
  51                 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
  52                                         sizeof(struct extendedFileEntry),
  53                                         GFP_KERNEL);
  54         } else {
  55                 iinfo->i_efe = 0;
  56                 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
  57                                         sizeof(struct fileEntry),
  58                                         GFP_KERNEL);
  59         }
  60         if (!iinfo->i_data) {
  61                 make_bad_inode(inode);
  62                 iput(inode);
  63                 return ERR_PTR(-ENOMEM);
  64         }
  65
  66         err = -ENOSPC;
  67         block = udf_new_block(dir->i_sb, NULL,
  68                               dinfo->i_location.partitionReferenceNum,
  69                               start, &err);
  70         if (err) {
  71                 make_bad_inode(inode);
  72                 iput(inode);
  73                 return ERR_PTR(err);
  74         }
  75
  76         iinfo->i_unique = lvid_get_unique_id(sb);
  77         inode->i_generation = iinfo->i_unique;
  78
  79         inode_init_owner(&nop_mnt_idmap, inode, dir, mode);
  80         if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
  81                 inode->i_uid = sbi->s_uid;
  82         if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
  83                 inode->i_gid = sbi->s_gid;
  84
  85         iinfo->i_location.logicalBlockNum = block;
  86         iinfo->i_location.partitionReferenceNum =
  87                                 dinfo->i_location.partitionReferenceNum;
  88         inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
  89         inode->i_blocks = 0;
  90         iinfo->i_lenEAttr = 0;
  91         iinfo->i_lenAlloc = 0;
  92         iinfo->i_use = 0;
  93         iinfo->i_checkpoint = 1;
  94         iinfo->i_extraPerms = FE_PERM_U_CHATTR;
  95         udf_update_extra_perms(inode, mode);
  96
  97         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
  98                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
  99         else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
 100                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
 101         else
 102                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
 103         inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 104         iinfo->i_crtime = inode->i_mtime;
 105         if (unlikely(insert_inode_locked(inode) < 0)) {
 106                 make_bad_inode(inode);
 107                 iput(inode);
 108                 return ERR_PTR(-EIO);
 109         }
 110         mark_inode_dirty(inode);
 111
 112         return inode;
 113 }