Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ialloc.c |
| 3 | * |
| 4 | * PURPOSE |
| 5 | * Inode allocation handling routines for the OSTA-UDF(tm) filesystem. |
| 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ingo Molnar | 1e7933d | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 45 | mutex_lock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Ingo Molnar | 1e7933d | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 56 | mutex_unlock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Eric Sandeen | 225add6 | 2006-08-05 12:15:17 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Ingo Molnar | 1e7933d | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 92 | mutex_lock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Ingo Molnar | 1e7933d | 2006-03-23 03:00:44 -0800 | [diff] [blame] | 152 | mutex_unlock(&sbi->s_alloc_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |