1 /* 2 * ialloc.c 3 * 4 * PURPOSE 5 * Inode allocation handling routines for the OSTA-UDF(tm) filesystem. 6 * 7 * CONTACTS 8 * E-mail regarding any portion of the Linux UDF file system should be 9 * directed to the development team mailing list (run by majordomo): 10 * linux_udf@hpesjro.fc.hp.com 11 * 12 * COPYRIGHT 13 * This file is distributed under the terms of the GNU General Public 14 * License (GPL). Copies of the GPL can be obtained from: 15 * ftp://prep.ai.mit.edu/pub/gnu/GPL 16 * Each contributing author retains all rights to their own work. 17 * 18 * (C) 1998-2001 Ben Fennema 19 * 20 * HISTORY 21 * 22 * 02/24/99 blf Created. 23 * 24 */ 25 26 #include "udfdecl.h" 27 #include <linux/fs.h> 28 #include <linux/quotaops.h> 29 #include <linux/udf_fs.h> 30 #include <linux/sched.h> 31 #include <linux/slab.h> 32 33 #include "udf_i.h" 34 #include "udf_sb.h" 35 36 void udf_free_inode(struct inode * inode) 37 { 38 struct super_block *sb = inode->i_sb; 39 struct udf_sb_info *sbi = UDF_SB(sb); 40 41 /* 42 * Note: we must free any quota before locking the superblock, 43 * as writing the quota to disk may need the lock as well. 44 */ 45 DQUOT_FREE_INODE(inode); 46 DQUOT_DROP(inode); 47 48 clear_inode(inode); 49 50 down(&sbi->s_alloc_sem); 51 if (sbi->s_lvidbh) { 52 if (S_ISDIR(inode->i_mode)) 53 UDF_SB_LVIDIU(sb)->numDirs = 54 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) - 1); 55 else 56 UDF_SB_LVIDIU(sb)->numFiles = 57 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1); 58 59 mark_buffer_dirty(sbi->s_lvidbh); 60 } 61 up(&sbi->s_alloc_sem); 62 63 udf_free_blocks(sb, NULL, UDF_I_LOCATION(inode), 0, 1); 64 } 65 66 struct inode * udf_new_inode (struct inode *dir, int mode, int * err) 67 { 68 struct super_block *sb = dir->i_sb; 69 struct udf_sb_info *sbi = UDF_SB(sb); 70 struct inode * inode; 71 int block; 72 uint32_t start = UDF_I_LOCATION(dir).logicalBlockNum; 73 74 inode = new_inode(sb); 75 76 if (!inode) 77 { 78 *err = -ENOMEM; 79 return NULL; 80 } 81 *err = -ENOSPC; 82 83 block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum, 84 start, err); 85 if (*err) 86 { 87 iput(inode); 88 return NULL; 89 } 90 91 down(&sbi->s_alloc_sem); 92 UDF_I_UNIQUE(inode) = 0; 93 UDF_I_LENEXTENTS(inode) = 0; 94 UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; 95 UDF_I_NEXT_ALLOC_GOAL(inode) = 0; 96 UDF_I_STRAT4096(inode) = 0; 97 if (UDF_SB_LVIDBH(sb)) 98 { 99 struct logicalVolHeaderDesc *lvhd; 100 uint64_t uniqueID; 101 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse); 102 if (S_ISDIR(mode)) 103 UDF_SB_LVIDIU(sb)->numDirs = 104 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1); 105 else 106 UDF_SB_LVIDIU(sb)->numFiles = 107 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1); 108 UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID); 109 if (!(++uniqueID & 0x00000000FFFFFFFFUL)) 110 uniqueID += 16; 111 lvhd->uniqueID = cpu_to_le64(uniqueID); 112 mark_buffer_dirty(UDF_SB_LVIDBH(sb)); 113 } 114 inode->i_mode = mode; 115 inode->i_uid = current->fsuid; 116 if (dir->i_mode & S_ISGID) 117 { 118 inode->i_gid = dir->i_gid; 119 if (S_ISDIR(mode)) 120 mode |= S_ISGID; 121 } 122 else 123 inode->i_gid = current->fsgid; 124 125 UDF_I_LOCATION(inode).logicalBlockNum = block; 126 UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; 127 inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0); 128 inode->i_blksize = PAGE_SIZE; 129 inode->i_blocks = 0; 130 UDF_I_LENEATTR(inode) = 0; 131 UDF_I_LENALLOC(inode) = 0; 132 UDF_I_USE(inode) = 0; 133 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) 134 { 135 UDF_I_EFE(inode) = 1; 136 UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE); 137 UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); 138 memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); 139 } 140 else 141 { 142 UDF_I_EFE(inode) = 0; 143 UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); 144 memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct fileEntry)); 145 } 146 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) 147 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; 148 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) 149 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; 150 else 151 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; 152 inode->i_mtime = inode->i_atime = inode->i_ctime = 153 UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb); 154 insert_inode_hash(inode); 155 mark_inode_dirty(inode); 156 up(&sbi->s_alloc_sem); 157 158 if (DQUOT_ALLOC_INODE(inode)) 159 { 160 DQUOT_DROP(inode); 161 inode->i_flags |= S_NOQUOTA; 162 inode->i_nlink = 0; 163 iput(inode); 164 *err = -EDQUOT; 165 return NULL; 166 } 167 168 *err = 0; 169 return inode; 170 } 171