blob: a4f2b3ce45b053ca76168a01d93b38974d34a949 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * ialloc.c
3 *
4 * PURPOSE
5 * Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/sched.h>
25#include <linux/slab.h>
26
27#include "udf_i.h"
28#include "udf_sb.h"
29
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070030void udf_free_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031{
32 struct super_block *sb = inode->i_sb;
33 struct udf_sb_info *sbi = UDF_SB(sb);
34
35 /*
36 * Note: we must free any quota before locking the superblock,
37 * as writing the quota to disk may need the lock as well.
38 */
39 DQUOT_FREE_INODE(inode);
40 DQUOT_DROP(inode);
41
42 clear_inode(inode);
43
Ingo Molnar1e7933d2006-03-23 03:00:44 -080044 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz6c79e982008-02-08 04:20:30 -080045 if (sbi->s_lvid_bh) {
46 struct logicalVolIntegrityDescImpUse *lvidiu =
47 udf_sb_lvidiu(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 if (S_ISDIR(inode->i_mode))
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +010049 le32_add_cpu(&lvidiu->numDirs, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 else
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +010051 le32_add_cpu(&lvidiu->numFiles, -1);
Cyrill Gorcunovc9c64152007-07-15 23:39:43 -070052
Marcin Slusarz6c79e982008-02-08 04:20:30 -080053 mark_buffer_dirty(sbi->s_lvid_bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 }
Ingo Molnar1e7933d2006-03-23 03:00:44 -080055 mutex_unlock(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
Marcin Slusarzc0b34432008-02-08 04:20:42 -080057 udf_free_blocks(sb, NULL, UDF_I(inode)->i_location, 0, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070060struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
62 struct super_block *sb = dir->i_sb;
63 struct udf_sb_info *sbi = UDF_SB(sb);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070064 struct inode *inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 int block;
Marcin Slusarzc0b34432008-02-08 04:20:42 -080066 uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -080067 struct udf_inode_info *iinfo;
68 struct udf_inode_info *dinfo = UDF_I(dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70 inode = new_inode(sb);
71
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -070072 if (!inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 *err = -ENOMEM;
74 return NULL;
75 }
76 *err = -ENOSPC;
77
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -080078 iinfo = UDF_I(inode);
Jan Kara97e1cfb2008-08-18 13:44:48 +020079 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
80 iinfo->i_efe = 1;
81 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
82 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
83 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
84 sizeof(struct extendedFileEntry),
85 GFP_KERNEL);
86 } else {
87 iinfo->i_efe = 0;
88 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
89 sizeof(struct fileEntry),
90 GFP_KERNEL);
91 }
92 if (!iinfo->i_ext.i_data) {
93 iput(inode);
94 *err = -ENOMEM;
95 return NULL;
96 }
Eric Sandeen225add62006-08-05 12:15:17 -070097
Marcin Slusarz4b111112008-02-08 04:20:36 -080098 block = udf_new_block(dir->i_sb, NULL,
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -080099 dinfo->i_location.partitionReferenceNum,
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700100 start, err);
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700101 if (*err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 iput(inode);
103 return NULL;
104 }
105
Ingo Molnar1e7933d2006-03-23 03:00:44 -0800106 mutex_lock(&sbi->s_alloc_mutex);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800107 if (sbi->s_lvid_bh) {
Marcin Slusarz4b111112008-02-08 04:20:36 -0800108 struct logicalVolIntegrityDesc *lvid =
109 (struct logicalVolIntegrityDesc *)
110 sbi->s_lvid_bh->b_data;
111 struct logicalVolIntegrityDescImpUse *lvidiu =
112 udf_sb_lvidiu(sbi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 struct logicalVolHeaderDesc *lvhd;
114 uint64_t uniqueID;
Marcin Slusarz4b111112008-02-08 04:20:36 -0800115 lvhd = (struct logicalVolHeaderDesc *)
116 (lvid->logicalVolContentsUse);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 if (S_ISDIR(mode))
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +0100118 le32_add_cpu(&lvidiu->numDirs, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 else
marcin.slusarz@gmail.comc2104fd2008-01-30 22:03:57 +0100120 le32_add_cpu(&lvidiu->numFiles, 1);
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800121 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
123 uniqueID += 16;
124 lvhd->uniqueID = cpu_to_le64(uniqueID);
Marcin Slusarz6c79e982008-02-08 04:20:30 -0800125 mark_buffer_dirty(sbi->s_lvid_bh);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 }
Jan Karadb0badc2008-08-18 13:40:18 +0200127 mutex_unlock(&sbi->s_alloc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 inode->i_mode = mode;
129 inode->i_uid = current->fsuid;
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700130 if (dir->i_mode & S_ISGID) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 inode->i_gid = dir->i_gid;
132 if (S_ISDIR(mode))
133 mode |= S_ISGID;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700134 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 inode->i_gid = current->fsgid;
Cyrill Gorcunov28de7942007-07-21 04:37:18 -0700136 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800138 iinfo->i_location.logicalBlockNum = block;
139 iinfo->i_location.partitionReferenceNum =
140 dinfo->i_location.partitionReferenceNum;
141 inode->i_ino = udf_get_lb_pblock(sb, iinfo->i_location, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 inode->i_blocks = 0;
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800143 iinfo->i_lenEAttr = 0;
144 iinfo->i_lenAlloc = 0;
145 iinfo->i_use = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800147 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800149 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 else
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800151 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 inode->i_mtime = inode->i_atime = inode->i_ctime =
Marcin Slusarz48d6d8f2008-02-08 04:20:44 -0800153 iinfo->i_crtime = current_fs_time(inode->i_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 insert_inode_hash(inode);
155 mark_inode_dirty(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156
Cyrill Gorcunovcb00ea32007-07-19 01:47:43 -0700157 if (DQUOT_ALLOC_INODE(inode)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 DQUOT_DROP(inode);
159 inode->i_flags |= S_NOQUOTA;
160 inode->i_nlink = 0;
161 iput(inode);
162 *err = -EDQUOT;
163 return NULL;
164 }
165
166 *err = 0;
167 return inode;
168}