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 53 mark_buffer_dirty(sbi->s_lvid_bh); 54 } 55 mutex_unlock(&sbi->s_alloc_mutex); 56 57 udf_free_blocks(sb, NULL, UDF_I(inode)->i_location, 0, 1); 58 } 59 60 struct inode *udf_new_inode(struct inode *dir, int mode, int *err) 61 { 62 struct super_block *sb = dir->i_sb; 63 struct udf_sb_info *sbi = UDF_SB(sb); 64 struct inode *inode; 65 int block; 66 uint32_t start = UDF_I(dir)->i_location.logicalBlockNum; 67 struct udf_inode_info *iinfo; 68 struct udf_inode_info *dinfo = UDF_I(dir); 69 70 inode = new_inode(sb); 71 72 if (!inode) { 73 *err = -ENOMEM; 74 return NULL; 75 } 76 *err = -ENOSPC; 77 78 iinfo = UDF_I(inode); 79 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { 80 iinfo->i_efe = 1; 81 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev) 82 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE; 83 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 84 sizeof(struct extendedFileEntry), 85 GFP_KERNEL); 86 } else { 87 iinfo->i_efe = 0; 88 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 89 sizeof(struct fileEntry), 90 GFP_KERNEL); 91 } 92 if (!iinfo->i_ext.i_data) { 93 iput(inode); 94 *err = -ENOMEM; 95 return NULL; 96 } 97 98 block = udf_new_block(dir->i_sb, NULL, 99 dinfo->i_location.partitionReferenceNum, 100 start, err); 101 if (*err) { 102 iput(inode); 103 return NULL; 104 } 105 106 mutex_lock(&sbi->s_alloc_mutex); 107 if (sbi->s_lvid_bh) { 108 struct logicalVolIntegrityDesc *lvid = 109 (struct logicalVolIntegrityDesc *) 110 sbi->s_lvid_bh->b_data; 111 struct logicalVolIntegrityDescImpUse *lvidiu = 112 udf_sb_lvidiu(sbi); 113 struct logicalVolHeaderDesc *lvhd; 114 uint64_t uniqueID; 115 lvhd = (struct logicalVolHeaderDesc *) 116 (lvid->logicalVolContentsUse); 117 if (S_ISDIR(mode)) 118 le32_add_cpu(&lvidiu->numDirs, 1); 119 else 120 le32_add_cpu(&lvidiu->numFiles, 1); 121 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID); 122 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 123 uniqueID += 16; 124 lvhd->uniqueID = cpu_to_le64(uniqueID); 125 mark_buffer_dirty(sbi->s_lvid_bh); 126 } 127 mutex_unlock(&sbi->s_alloc_mutex); 128 inode->i_mode = mode; 129 inode->i_uid = current_fsuid(); 130 if (dir->i_mode & S_ISGID) { 131 inode->i_gid = dir->i_gid; 132 if (S_ISDIR(mode)) 133 mode |= S_ISGID; 134 } else { 135 inode->i_gid = current_fsgid(); 136 } 137 138 iinfo->i_location.logicalBlockNum = block; 139 iinfo->i_location.partitionReferenceNum = 140 dinfo->i_location.partitionReferenceNum; 141 inode->i_ino = udf_get_lb_pblock(sb, iinfo->i_location, 0); 142 inode->i_blocks = 0; 143 iinfo->i_lenEAttr = 0; 144 iinfo->i_lenAlloc = 0; 145 iinfo->i_use = 0; 146 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 147 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 148 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 149 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 150 else 151 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 152 inode->i_mtime = inode->i_atime = inode->i_ctime = 153 iinfo->i_crtime = current_fs_time(inode->i_sb); 154 insert_inode_hash(inode); 155 mark_inode_dirty(inode); 156 157 if (DQUOT_ALLOC_INODE(inode)) { 158 DQUOT_DROP(inode); 159 inode->i_flags |= S_NOQUOTA; 160 inode->i_nlink = 0; 161 iput(inode); 162 *err = -EDQUOT; 163 return NULL; 164 } 165 166 *err = 0; 167 return inode; 168 } 169