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 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 48 struct 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 udf_pblk_t 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_data = kzalloc(inode->i_sb->s_blocksize - 71 sizeof(struct extendedFileEntry), 72 GFP_KERNEL); 73 } else { 74 iinfo->i_efe = 0; 75 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize - 76 sizeof(struct fileEntry), 77 GFP_KERNEL); 78 } 79 if (!iinfo->i_data) { 80 make_bad_inode(inode); 81 iput(inode); 82 return ERR_PTR(-ENOMEM); 83 } 84 85 err = -ENOSPC; 86 block = udf_new_block(dir->i_sb, NULL, 87 dinfo->i_location.partitionReferenceNum, 88 start, &err); 89 if (err) { 90 make_bad_inode(inode); 91 iput(inode); 92 return ERR_PTR(err); 93 } 94 95 lvidiu = udf_sb_lvidiu(sb); 96 if (lvidiu) { 97 iinfo->i_unique = lvid_get_unique_id(sb); 98 inode->i_generation = iinfo->i_unique; 99 mutex_lock(&sbi->s_alloc_mutex); 100 if (S_ISDIR(mode)) 101 le32_add_cpu(&lvidiu->numDirs, 1); 102 else 103 le32_add_cpu(&lvidiu->numFiles, 1); 104 udf_updated_lvid(sb); 105 mutex_unlock(&sbi->s_alloc_mutex); 106 } 107 108 inode_init_owner(&init_user_ns, inode, dir, mode); 109 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET)) 110 inode->i_uid = sbi->s_uid; 111 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET)) 112 inode->i_gid = sbi->s_gid; 113 114 iinfo->i_location.logicalBlockNum = block; 115 iinfo->i_location.partitionReferenceNum = 116 dinfo->i_location.partitionReferenceNum; 117 inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0); 118 inode->i_blocks = 0; 119 iinfo->i_lenEAttr = 0; 120 iinfo->i_lenAlloc = 0; 121 iinfo->i_use = 0; 122 iinfo->i_checkpoint = 1; 123 iinfo->i_extraPerms = FE_PERM_U_CHATTR; 124 udf_update_extra_perms(inode, mode); 125 126 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 127 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 128 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 129 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 130 else 131 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 132 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); 133 iinfo->i_crtime = inode->i_mtime; 134 if (unlikely(insert_inode_locked(inode) < 0)) { 135 make_bad_inode(inode); 136 iput(inode); 137 return ERR_PTR(-EIO); 138 } 139 mark_inode_dirty(inode); 140 141 return inode; 142 } 143