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 iinfo->i_unique = 0; 80 iinfo->i_lenExtents = 0; 81 iinfo->i_next_alloc_block = 0; 82 iinfo->i_next_alloc_goal = 0; 83 iinfo->i_strat4096 = 0; 84 85 block = udf_new_block(dir->i_sb, NULL, 86 dinfo->i_location.partitionReferenceNum, 87 start, err); 88 if (*err) { 89 iput(inode); 90 return NULL; 91 } 92 93 mutex_lock(&sbi->s_alloc_mutex); 94 if (sbi->s_lvid_bh) { 95 struct logicalVolIntegrityDesc *lvid = 96 (struct logicalVolIntegrityDesc *) 97 sbi->s_lvid_bh->b_data; 98 struct logicalVolIntegrityDescImpUse *lvidiu = 99 udf_sb_lvidiu(sbi); 100 struct logicalVolHeaderDesc *lvhd; 101 uint64_t uniqueID; 102 lvhd = (struct logicalVolHeaderDesc *) 103 (lvid->logicalVolContentsUse); 104 if (S_ISDIR(mode)) 105 le32_add_cpu(&lvidiu->numDirs, 1); 106 else 107 le32_add_cpu(&lvidiu->numFiles, 1); 108 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID); 109 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 110 uniqueID += 16; 111 lvhd->uniqueID = cpu_to_le64(uniqueID); 112 mark_buffer_dirty(sbi->s_lvid_bh); 113 } 114 inode->i_mode = mode; 115 inode->i_uid = current->fsuid; 116 if (dir->i_mode & S_ISGID) { 117 inode->i_gid = dir->i_gid; 118 if (S_ISDIR(mode)) 119 mode |= S_ISGID; 120 } else { 121 inode->i_gid = current->fsgid; 122 } 123 124 iinfo->i_location.logicalBlockNum = block; 125 iinfo->i_location.partitionReferenceNum = 126 dinfo->i_location.partitionReferenceNum; 127 inode->i_ino = udf_get_lb_pblock(sb, iinfo->i_location, 0); 128 inode->i_blocks = 0; 129 iinfo->i_lenEAttr = 0; 130 iinfo->i_lenAlloc = 0; 131 iinfo->i_use = 0; 132 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { 133 iinfo->i_efe = 1; 134 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev) 135 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE; 136 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 137 sizeof(struct extendedFileEntry), 138 GFP_KERNEL); 139 } else { 140 iinfo->i_efe = 0; 141 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - 142 sizeof(struct fileEntry), 143 GFP_KERNEL); 144 } 145 if (!iinfo->i_ext.i_data) { 146 iput(inode); 147 *err = -ENOMEM; 148 mutex_unlock(&sbi->s_alloc_mutex); 149 return NULL; 150 } 151 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 152 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; 153 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 154 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; 155 else 156 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; 157 inode->i_mtime = inode->i_atime = inode->i_ctime = 158 iinfo->i_crtime = current_fs_time(inode->i_sb); 159 insert_inode_hash(inode); 160 mark_inode_dirty(inode); 161 mutex_unlock(&sbi->s_alloc_mutex); 162 163 if (DQUOT_ALLOC_INODE(inode)) { 164 DQUOT_DROP(inode); 165 inode->i_flags |= S_NOQUOTA; 166 inode->i_nlink = 0; 167 iput(inode); 168 *err = -EDQUOT; 169 return NULL; 170 } 171 172 *err = 0; 173 return inode; 174 } 175