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_lvidbh) { 47 if (S_ISDIR(inode->i_mode)) 48 UDF_SB_LVIDIU(sb)->numDirs = 49 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) - 1); 50 else 51 UDF_SB_LVIDIU(sb)->numFiles = 52 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1); 53 54 mark_buffer_dirty(sbi->s_lvidbh); 55 } 56 mutex_unlock(&sbi->s_alloc_mutex); 57 58 udf_free_blocks(sb, NULL, UDF_I_LOCATION(inode), 0, 1); 59 } 60 61 struct inode *udf_new_inode(struct inode *dir, int mode, int *err) 62 { 63 struct super_block *sb = dir->i_sb; 64 struct udf_sb_info *sbi = UDF_SB(sb); 65 struct inode *inode; 66 int block; 67 uint32_t start = UDF_I_LOCATION(dir).logicalBlockNum; 68 69 inode = new_inode(sb); 70 71 if (!inode) { 72 *err = -ENOMEM; 73 return NULL; 74 } 75 *err = -ENOSPC; 76 77 UDF_I_UNIQUE(inode) = 0; 78 UDF_I_LENEXTENTS(inode) = 0; 79 UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; 80 UDF_I_NEXT_ALLOC_GOAL(inode) = 0; 81 UDF_I_STRAT4096(inode) = 0; 82 83 block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum, 84 start, err); 85 if (*err) { 86 iput(inode); 87 return NULL; 88 } 89 90 mutex_lock(&sbi->s_alloc_mutex); 91 if (UDF_SB_LVIDBH(sb)) { 92 struct logicalVolHeaderDesc *lvhd; 93 uint64_t uniqueID; 94 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse); 95 if (S_ISDIR(mode)) 96 UDF_SB_LVIDIU(sb)->numDirs = 97 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1); 98 else 99 UDF_SB_LVIDIU(sb)->numFiles = 100 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1); 101 UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID); 102 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 103 uniqueID += 16; 104 lvhd->uniqueID = cpu_to_le64(uniqueID); 105 mark_buffer_dirty(UDF_SB_LVIDBH(sb)); 106 } 107 inode->i_mode = mode; 108 inode->i_uid = current->fsuid; 109 if (dir->i_mode & S_ISGID) { 110 inode->i_gid = dir->i_gid; 111 if (S_ISDIR(mode)) 112 mode |= S_ISGID; 113 } else { 114 inode->i_gid = current->fsgid; 115 } 116 117 UDF_I_LOCATION(inode).logicalBlockNum = block; 118 UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; 119 inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0); 120 inode->i_blocks = 0; 121 UDF_I_LENEATTR(inode) = 0; 122 UDF_I_LENALLOC(inode) = 0; 123 UDF_I_USE(inode) = 0; 124 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { 125 UDF_I_EFE(inode) = 1; 126 UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE); 127 UDF_I_DATA(inode) = kzalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); 128 } else { 129 UDF_I_EFE(inode) = 0; 130 UDF_I_DATA(inode) = kzalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); 131 } 132 if (!UDF_I_DATA(inode)) { 133 iput(inode); 134 *err = -ENOMEM; 135 mutex_unlock(&sbi->s_alloc_mutex); 136 return NULL; 137 } 138 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 139 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; 140 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 141 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; 142 else 143 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; 144 inode->i_mtime = inode->i_atime = inode->i_ctime = 145 UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb); 146 insert_inode_hash(inode); 147 mark_inode_dirty(inode); 148 mutex_unlock(&sbi->s_alloc_mutex); 149 150 if (DQUOT_ALLOC_INODE(inode)) { 151 DQUOT_DROP(inode); 152 inode->i_flags |= S_NOQUOTA; 153 inode->i_nlink = 0; 154 iput(inode); 155 *err = -EDQUOT; 156 return NULL; 157 } 158 159 *err = 0; 160 return inode; 161 } 162