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 { 73 *err = -ENOMEM; 74 return NULL; 75 } 76 *err = -ENOSPC; 77 78 UDF_I_UNIQUE(inode) = 0; 79 UDF_I_LENEXTENTS(inode) = 0; 80 UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; 81 UDF_I_NEXT_ALLOC_GOAL(inode) = 0; 82 UDF_I_STRAT4096(inode) = 0; 83 84 block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum, 85 start, err); 86 if (*err) 87 { 88 iput(inode); 89 return NULL; 90 } 91 92 mutex_lock(&sbi->s_alloc_mutex); 93 if (UDF_SB_LVIDBH(sb)) 94 { 95 struct logicalVolHeaderDesc *lvhd; 96 uint64_t uniqueID; 97 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse); 98 if (S_ISDIR(mode)) 99 UDF_SB_LVIDIU(sb)->numDirs = 100 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1); 101 else 102 UDF_SB_LVIDIU(sb)->numFiles = 103 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1); 104 UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID); 105 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 106 uniqueID += 16; 107 lvhd->uniqueID = cpu_to_le64(uniqueID); 108 mark_buffer_dirty(UDF_SB_LVIDBH(sb)); 109 } 110 inode->i_mode = mode; 111 inode->i_uid = current->fsuid; 112 if (dir->i_mode & S_ISGID) 113 { 114 inode->i_gid = dir->i_gid; 115 if (S_ISDIR(mode)) 116 mode |= S_ISGID; 117 } 118 else 119 inode->i_gid = current->fsgid; 120 121 UDF_I_LOCATION(inode).logicalBlockNum = block; 122 UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; 123 inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0); 124 inode->i_blksize = PAGE_SIZE; 125 inode->i_blocks = 0; 126 UDF_I_LENEATTR(inode) = 0; 127 UDF_I_LENALLOC(inode) = 0; 128 UDF_I_USE(inode) = 0; 129 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) 130 { 131 UDF_I_EFE(inode) = 1; 132 UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE); 133 UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); 134 memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); 135 } 136 else 137 { 138 UDF_I_EFE(inode) = 0; 139 UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); 140 memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 141 } 142 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 143 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; 144 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 145 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; 146 else 147 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; 148 inode->i_mtime = inode->i_atime = inode->i_ctime = 149 UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb); 150 insert_inode_hash(inode); 151 mark_inode_dirty(inode); 152 mutex_unlock(&sbi->s_alloc_mutex); 153 154 if (DQUOT_ALLOC_INODE(inode)) 155 { 156 DQUOT_DROP(inode); 157 inode->i_flags |= S_NOQUOTA; 158 inode->i_nlink = 0; 159 iput(inode); 160 *err = -EDQUOT; 161 return NULL; 162 } 163 164 *err = 0; 165 return inode; 166 } 167