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/quotaops.h> 24 #include <linux/sched.h> 25 #include <linux/slab.h> 26 27 #include "udf_i.h" 28 #include "udf_sb.h" 29 30 void udf_free_inode(struct inode *inode) 31 { 32 struct super_block *sb = inode->i_sb; 33 struct udf_sb_info *sbi = UDF_SB(sb); 34 35 /* 36 * Note: we must free any quota before locking the superblock, 37 * as writing the quota to disk may need the lock as well. 38 */ 39 dquot_free_inode(inode); 40 dquot_drop(inode); 41 42 clear_inode(inode); 43 44 mutex_lock(&sbi->s_alloc_mutex); 45 if (sbi->s_lvid_bh) { 46 struct logicalVolIntegrityDescImpUse *lvidiu = 47 udf_sb_lvidiu(sbi); 48 if (S_ISDIR(inode->i_mode)) 49 le32_add_cpu(&lvidiu->numDirs, -1); 50 else 51 le32_add_cpu(&lvidiu->numFiles, -1); 52 udf_updated_lvid(sb); 53 } 54 mutex_unlock(&sbi->s_alloc_mutex); 55 56 udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1); 57 } 58 59 struct inode *udf_new_inode(struct inode *dir, int mode, int *err) 60 { 61 struct super_block *sb = dir->i_sb; 62 struct udf_sb_info *sbi = UDF_SB(sb); 63 struct inode *inode; 64 int block, ret; 65 uint32_t start = UDF_I(dir)->i_location.logicalBlockNum; 66 struct udf_inode_info *iinfo; 67 struct udf_inode_info *dinfo = UDF_I(dir); 68 69 inode = new_inode(sb); 70 71 if (!inode) { 72 *err = -ENOMEM; 73 return NULL; 74 } 75 *err = -ENOSPC; 76 77 iinfo = UDF_I(inode); 78 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { 79 iinfo->i_efe = 1; 80 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev) 81 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE; 82 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 83 sizeof(struct extendedFileEntry), 84 GFP_KERNEL); 85 } else { 86 iinfo->i_efe = 0; 87 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 88 sizeof(struct fileEntry), 89 GFP_KERNEL); 90 } 91 if (!iinfo->i_ext.i_data) { 92 iput(inode); 93 *err = -ENOMEM; 94 return NULL; 95 } 96 97 block = udf_new_block(dir->i_sb, NULL, 98 dinfo->i_location.partitionReferenceNum, 99 start, err); 100 if (*err) { 101 iput(inode); 102 return NULL; 103 } 104 105 mutex_lock(&sbi->s_alloc_mutex); 106 if (sbi->s_lvid_bh) { 107 struct logicalVolIntegrityDesc *lvid = 108 (struct logicalVolIntegrityDesc *) 109 sbi->s_lvid_bh->b_data; 110 struct logicalVolIntegrityDescImpUse *lvidiu = 111 udf_sb_lvidiu(sbi); 112 struct logicalVolHeaderDesc *lvhd; 113 uint64_t uniqueID; 114 lvhd = (struct logicalVolHeaderDesc *) 115 (lvid->logicalVolContentsUse); 116 if (S_ISDIR(mode)) 117 le32_add_cpu(&lvidiu->numDirs, 1); 118 else 119 le32_add_cpu(&lvidiu->numFiles, 1); 120 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID); 121 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 122 uniqueID += 16; 123 lvhd->uniqueID = cpu_to_le64(uniqueID); 124 udf_updated_lvid(sb); 125 } 126 mutex_unlock(&sbi->s_alloc_mutex); 127 inode->i_mode = mode; 128 inode->i_uid = current_fsuid(); 129 if (dir->i_mode & S_ISGID) { 130 inode->i_gid = dir->i_gid; 131 if (S_ISDIR(mode)) 132 mode |= S_ISGID; 133 } else { 134 inode->i_gid = current_fsgid(); 135 } 136 137 iinfo->i_location.logicalBlockNum = block; 138 iinfo->i_location.partitionReferenceNum = 139 dinfo->i_location.partitionReferenceNum; 140 inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0); 141 inode->i_blocks = 0; 142 iinfo->i_lenEAttr = 0; 143 iinfo->i_lenAlloc = 0; 144 iinfo->i_use = 0; 145 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 146 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 147 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 148 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 149 else 150 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 151 inode->i_mtime = inode->i_atime = inode->i_ctime = 152 iinfo->i_crtime = current_fs_time(inode->i_sb); 153 insert_inode_hash(inode); 154 mark_inode_dirty(inode); 155 156 dquot_initialize(inode); 157 ret = dquot_alloc_inode(inode); 158 if (ret) { 159 dquot_drop(inode); 160 inode->i_flags |= S_NOQUOTA; 161 inode->i_nlink = 0; 162 iput(inode); 163 *err = ret; 164 return NULL; 165 } 166 167 *err = 0; 168 return inode; 169 } 170