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_lvid_bh) {
47 struct logicalVolIntegrityDescImpUse *lvidiu =
48 udf_sb_lvidiu(sbi);
49 if (S_ISDIR(inode->i_mode))
50 lvidiu->numDirs =
51 cpu_to_le32(le32_to_cpu(lvidiu->numDirs) - 1);
52 else
53 lvidiu->numFiles =
54 cpu_to_le32(le32_to_cpu(lvidiu->numFiles) - 1);
55
56 mark_buffer_dirty(sbi->s_lvid_bh);
57 }
58 mutex_unlock(&sbi->s_alloc_mutex);
59
60 udf_free_blocks(sb, NULL, UDF_I(inode)->i_location, 0, 1);
61 }
62
63 struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
64 {
65 struct super_block *sb = dir->i_sb;
66 struct udf_sb_info *sbi = UDF_SB(sb);
67 struct inode *inode;
68 int block;
69 uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
70 struct udf_inode_info *iinfo;
71 struct udf_inode_info *dinfo = UDF_I(dir);
72
73 inode = new_inode(sb);
74
75 if (!inode) {
76 *err = -ENOMEM;
77 return NULL;
78 }
79 *err = -ENOSPC;
80
81 iinfo = UDF_I(inode);
82 iinfo->i_unique = 0;
83 iinfo->i_lenExtents = 0;
84 iinfo->i_next_alloc_block = 0;
85 iinfo->i_next_alloc_goal = 0;
86 iinfo->i_strat4096 = 0;
87
88 block = udf_new_block(dir->i_sb, NULL,
89 dinfo->i_location.partitionReferenceNum,
90 start, err);
91 if (*err) {
92 iput(inode);
93 return NULL;
94 }
95
96 mutex_lock(&sbi->s_alloc_mutex);
97 if (sbi->s_lvid_bh) {
98 struct logicalVolIntegrityDesc *lvid =
99 (struct logicalVolIntegrityDesc *)
100 sbi->s_lvid_bh->b_data;
101 struct logicalVolIntegrityDescImpUse *lvidiu =
102 udf_sb_lvidiu(sbi);
103 struct logicalVolHeaderDesc *lvhd;
104 uint64_t uniqueID;
105 lvhd = (struct logicalVolHeaderDesc *)
106 (lvid->logicalVolContentsUse);
107 if (S_ISDIR(mode))
108 lvidiu->numDirs =
109 cpu_to_le32(le32_to_cpu(lvidiu->numDirs) + 1);
110 else
111 lvidiu->numFiles =
112 cpu_to_le32(le32_to_cpu(lvidiu->numFiles) + 1);
113 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID);
114 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
115 uniqueID += 16;
116 lvhd->uniqueID = cpu_to_le64(uniqueID);
117 mark_buffer_dirty(sbi->s_lvid_bh);
118 }
119 inode->i_mode = mode;
120 inode->i_uid = current->fsuid;
121 if (dir->i_mode & S_ISGID) {
122 inode->i_gid = dir->i_gid;
123 if (S_ISDIR(mode))
124 mode |= S_ISGID;
125 } else {
126 inode->i_gid = current->fsgid;
127 }
128
129 iinfo->i_location.logicalBlockNum = block;
130 iinfo->i_location.partitionReferenceNum =
131 dinfo->i_location.partitionReferenceNum;
132 inode->i_ino = udf_get_lb_pblock(sb, iinfo->i_location, 0);
133 inode->i_blocks = 0;
134 iinfo->i_lenEAttr = 0;
135 iinfo->i_lenAlloc = 0;
136 iinfo->i_use = 0;
137 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
138 iinfo->i_efe = 1;
139 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
140 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
141 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
142 sizeof(struct extendedFileEntry),
143 GFP_KERNEL);
144 } else {
145 iinfo->i_efe = 0;
146 iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
147 sizeof(struct fileEntry),
148 GFP_KERNEL);
149 }
150 if (!iinfo->i_ext.i_data) {
151 iput(inode);
152 *err = -ENOMEM;
153 mutex_unlock(&sbi->s_alloc_mutex);
154 return NULL;
155 }
156 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
157 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
158 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
159 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
160 else
161 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
162 inode->i_mtime = inode->i_atime = inode->i_ctime =
163 iinfo->i_crtime = current_fs_time(inode->i_sb);
164 insert_inode_hash(inode);
165 mark_inode_dirty(inode);
166 mutex_unlock(&sbi->s_alloc_mutex);
167
168 if (DQUOT_ALLOC_INODE(inode)) {
169 DQUOT_DROP(inode);
170 inode->i_flags |= S_NOQUOTA;
171 inode->i_nlink = 0;
172 iput(inode);
173 *err = -EDQUOT;
174 return NULL;
175 }
176
177 *err = 0;
178 return inode;
179 }
180
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