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/udf_fs.h> 25 #include <linux/sched.h> 26 #include <linux/slab.h> 27 28 #include "udf_i.h" 29 #include "udf_sb.h" 30 31 void udf_free_inode(struct inode *inode) 32 { 33 struct super_block *sb = inode->i_sb; 34 struct udf_sb_info *sbi = UDF_SB(sb); 35 36 /* 37 * Note: we must free any quota before locking the superblock, 38 * as writing the quota to disk may need the lock as well. 39 */ 40 DQUOT_FREE_INODE(inode); 41 DQUOT_DROP(inode); 42 43 clear_inode(inode); 44 45 mutex_lock(&sbi->s_alloc_mutex); 46 if (sbi->s_lvid_bh) { 47 struct logicalVolIntegrityDescImpUse *lvidiu = 48 udf_sb_lvidiu(sbi); 49 if (S_ISDIR(inode->i_mode)) 50 lvidiu->numDirs = 51 cpu_to_le32(le32_to_cpu(lvidiu->numDirs) - 1); 52 else 53 lvidiu->numFiles = 54 cpu_to_le32(le32_to_cpu(lvidiu->numFiles) - 1); 55 56 mark_buffer_dirty(sbi->s_lvid_bh); 57 } 58 mutex_unlock(&sbi->s_alloc_mutex); 59 60 udf_free_blocks(sb, NULL, UDF_I(inode)->i_location, 0, 1); 61 } 62 63 struct inode *udf_new_inode(struct inode *dir, int mode, int *err) 64 { 65 struct super_block *sb = dir->i_sb; 66 struct udf_sb_info *sbi = UDF_SB(sb); 67 struct inode *inode; 68 int block; 69 uint32_t start = UDF_I(dir)->i_location.logicalBlockNum; 70 struct udf_inode_info *iinfo; 71 struct udf_inode_info *dinfo = UDF_I(dir); 72 73 inode = new_inode(sb); 74 75 if (!inode) { 76 *err = -ENOMEM; 77 return NULL; 78 } 79 *err = -ENOSPC; 80 81 iinfo = UDF_I(inode); 82 iinfo->i_unique = 0; 83 iinfo->i_lenExtents = 0; 84 iinfo->i_next_alloc_block = 0; 85 iinfo->i_next_alloc_goal = 0; 86 iinfo->i_strat4096 = 0; 87 88 block = udf_new_block(dir->i_sb, NULL, 89 dinfo->i_location.partitionReferenceNum, 90 start, err); 91 if (*err) { 92 iput(inode); 93 return NULL; 94 } 95 96 mutex_lock(&sbi->s_alloc_mutex); 97 if (sbi->s_lvid_bh) { 98 struct logicalVolIntegrityDesc *lvid = 99 (struct logicalVolIntegrityDesc *) 100 sbi->s_lvid_bh->b_data; 101 struct logicalVolIntegrityDescImpUse *lvidiu = 102 udf_sb_lvidiu(sbi); 103 struct logicalVolHeaderDesc *lvhd; 104 uint64_t uniqueID; 105 lvhd = (struct logicalVolHeaderDesc *) 106 (lvid->logicalVolContentsUse); 107 if (S_ISDIR(mode)) 108 lvidiu->numDirs = 109 cpu_to_le32(le32_to_cpu(lvidiu->numDirs) + 1); 110 else 111 lvidiu->numFiles = 112 cpu_to_le32(le32_to_cpu(lvidiu->numFiles) + 1); 113 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID); 114 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 115 uniqueID += 16; 116 lvhd->uniqueID = cpu_to_le64(uniqueID); 117 mark_buffer_dirty(sbi->s_lvid_bh); 118 } 119 inode->i_mode = mode; 120 inode->i_uid = current->fsuid; 121 if (dir->i_mode & S_ISGID) { 122 inode->i_gid = dir->i_gid; 123 if (S_ISDIR(mode)) 124 mode |= S_ISGID; 125 } else { 126 inode->i_gid = current->fsgid; 127 } 128 129 iinfo->i_location.logicalBlockNum = block; 130 iinfo->i_location.partitionReferenceNum = 131 dinfo->i_location.partitionReferenceNum; 132 inode->i_ino = udf_get_lb_pblock(sb, iinfo->i_location, 0); 133 inode->i_blocks = 0; 134 iinfo->i_lenEAttr = 0; 135 iinfo->i_lenAlloc = 0; 136 iinfo->i_use = 0; 137 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { 138 iinfo->i_efe = 1; 139 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev) 140 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE; 141 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 142 sizeof(struct extendedFileEntry), 143 GFP_KERNEL); 144 } else { 145 iinfo->i_efe = 0; 146 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 147 sizeof(struct fileEntry), 148 GFP_KERNEL); 149 } 150 if (!iinfo->i_ext.i_data) { 151 iput(inode); 152 *err = -ENOMEM; 153 mutex_unlock(&sbi->s_alloc_mutex); 154 return NULL; 155 } 156 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 157 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 158 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 159 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 160 else 161 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 162 inode->i_mtime = inode->i_atime = inode->i_ctime = 163 iinfo->i_crtime = current_fs_time(inode->i_sb); 164 insert_inode_hash(inode); 165 mark_inode_dirty(inode); 166 mutex_unlock(&sbi->s_alloc_mutex); 167 168 if (DQUOT_ALLOC_INODE(inode)) { 169 DQUOT_DROP(inode); 170 inode->i_flags |= S_NOQUOTA; 171 inode->i_nlink = 0; 172 iput(inode); 173 *err = -EDQUOT; 174 return NULL; 175 } 176 177 *err = 0; 178 return inode; 179 } 180