| 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/sched.h> |
| 24 | #include <linux/slab.h> |
| 25 | |
| 26 | #include "udf_i.h" |
| 27 | #include "udf_sb.h" |
| 28 | |
| 29 | void udf_free_inode(struct inode *inode) |
| 30 | { |
| 31 | struct super_block *sb = inode->i_sb; |
| 32 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 33 | struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb); |
| 34 | |
| 35 | if (lvidiu) { |
| 36 | mutex_lock(&sbi->s_alloc_mutex); |
| 37 | if (S_ISDIR(inode->i_mode)) |
| 38 | le32_add_cpu(&lvidiu->numDirs, -1); |
| 39 | else |
| 40 | le32_add_cpu(&lvidiu->numFiles, -1); |
| 41 | udf_updated_lvid(sb); |
| 42 | mutex_unlock(&sbi->s_alloc_mutex); |
| 43 | } |
| 44 | |
| 45 | udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1); |
| 46 | } |
| 47 | |
| 48 | struct inode *udf_new_inode(struct inode *dir, umode_t mode) |
| 49 | { |
| 50 | struct super_block *sb = dir->i_sb; |
| 51 | struct udf_sb_info *sbi = UDF_SB(sb); |
| 52 | struct inode *inode; |
| 53 | int block; |
| 54 | uint32_t start = UDF_I(dir)->i_location.logicalBlockNum; |
| 55 | struct udf_inode_info *iinfo; |
| 56 | struct udf_inode_info *dinfo = UDF_I(dir); |
| 57 | struct logicalVolIntegrityDescImpUse *lvidiu; |
| 58 | int err; |
| 59 | |
| 60 | inode = new_inode(sb); |
| 61 | |
| 62 | if (!inode) |
| 63 | return ERR_PTR(-ENOMEM); |
| 64 | |
| 65 | iinfo = UDF_I(inode); |
| 66 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { |
| 67 | iinfo->i_efe = 1; |
| 68 | if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev) |
| 69 | sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE; |
| 70 | iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - |
| 71 | sizeof(struct extendedFileEntry), |
| 72 | GFP_KERNEL); |
| 73 | } else { |
| 74 | iinfo->i_efe = 0; |
| 75 | iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - |
| 76 | sizeof(struct fileEntry), |
| 77 | GFP_KERNEL); |
| 78 | } |
| 79 | if (!iinfo->i_ext.i_data) { |
| 80 | iput(inode); |
| 81 | return ERR_PTR(-ENOMEM); |
| 82 | } |
| 83 | |
| 84 | err = -ENOSPC; |
| 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 ERR_PTR(err); |
| 91 | } |
| 92 | |
| 93 | lvidiu = udf_sb_lvidiu(sb); |
| 94 | if (lvidiu) { |
| 95 | iinfo->i_unique = lvid_get_unique_id(sb); |
| 96 | inode->i_generation = iinfo->i_unique; |
| 97 | mutex_lock(&sbi->s_alloc_mutex); |
| 98 | if (S_ISDIR(mode)) |
| 99 | le32_add_cpu(&lvidiu->numDirs, 1); |
| 100 | else |
| 101 | le32_add_cpu(&lvidiu->numFiles, 1); |
| 102 | udf_updated_lvid(sb); |
| 103 | mutex_unlock(&sbi->s_alloc_mutex); |
| 104 | } |
| 105 | |
| 106 | inode_init_owner(inode, dir, mode); |
| 107 | |
| 108 | iinfo->i_location.logicalBlockNum = block; |
| 109 | iinfo->i_location.partitionReferenceNum = |
| 110 | dinfo->i_location.partitionReferenceNum; |
| 111 | inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0); |
| 112 | inode->i_blocks = 0; |
| 113 | iinfo->i_lenEAttr = 0; |
| 114 | iinfo->i_lenAlloc = 0; |
| 115 | iinfo->i_use = 0; |
| 116 | iinfo->i_checkpoint = 1; |
| 117 | if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) |
| 118 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
| 119 | else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
| 120 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
| 121 | else |
| 122 | iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
| 123 | inode->i_mtime = inode->i_atime = inode->i_ctime = |
| 124 | iinfo->i_crtime = current_fs_time(inode->i_sb); |
| 125 | if (unlikely(insert_inode_locked(inode) < 0)) { |
| 126 | make_bad_inode(inode); |
| 127 | iput(inode); |
| 128 | return ERR_PTR(-EIO); |
| 129 | } |
| 130 | mark_inode_dirty(inode); |
| 131 | |
| 132 | return inode; |
| 133 | } |