File: /usr/src/linux/fs/udf/ialloc.c
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) 1998-2000 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/locks.h>
29 #include <linux/quotaops.h>
30 #include <linux/udf_fs.h>
31
32 #include "udf_i.h"
33 #include "udf_sb.h"
34
35 void udf_free_inode(struct inode * inode)
36 {
37 struct super_block * sb = inode->i_sb;
38 int is_directory;
39 unsigned long ino;
40
41 ino = inode->i_ino;
42
43 /*
44 * Note: we must free any quota before locking the superblock,
45 * as writing the quota to disk may need the lock as well.
46 */
47 DQUOT_FREE_INODE(sb, inode);
48 DQUOT_DROP(inode);
49
50 lock_super(sb);
51
52 is_directory = S_ISDIR(inode->i_mode);
53
54 clear_inode(inode);
55
56 if (UDF_SB_LVIDBH(sb))
57 {
58 if (is_directory)
59 UDF_SB_LVIDIU(sb)->numDirs =
60 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) - 1);
61 else
62 UDF_SB_LVIDIU(sb)->numFiles =
63 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1);
64
65 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
66 }
67
68 unlock_super(sb);
69
70 udf_free_blocks(inode, UDF_I_LOCATION(inode), 0, 1);
71 }
72
73 struct inode * udf_new_inode (const struct inode *dir, int mode, int * err)
74 {
75 struct super_block *sb;
76 struct inode * inode;
77 int block;
78 Uint32 start = UDF_I_LOCATION(dir).logicalBlockNum;
79
80 sb = dir->i_sb;
81 inode = new_inode(sb);
82
83 if (!inode)
84 {
85 *err = -ENOMEM;
86 return NULL;
87 }
88 *err = -ENOSPC;
89
90 block = udf_new_block(dir, UDF_I_LOCATION(dir).partitionReferenceNum,
91 start, err);
92 if (*err)
93 {
94 iput(inode);
95 return NULL;
96 }
97 lock_super(sb);
98
99 if (UDF_SB_LVIDBH(sb))
100 {
101 struct LogicalVolHeaderDesc *lvhd;
102 Uint64 uniqueID;
103 lvhd = (struct LogicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse);
104 if (S_ISDIR(mode))
105 UDF_SB_LVIDIU(sb)->numDirs =
106 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1);
107 else
108 UDF_SB_LVIDIU(sb)->numFiles =
109 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1);
110 UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID);
111 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
112 uniqueID += 16;
113 lvhd->uniqueID = cpu_to_le64(uniqueID);
114 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
115 }
116 inode->i_mode = mode;
117 inode->i_uid = current->fsuid;
118 if (dir->i_mode & S_ISGID)
119 {
120 inode->i_gid = dir->i_gid;
121 if (S_ISDIR(mode))
122 mode |= S_ISGID;
123 }
124 else
125 inode->i_gid = current->fsgid;
126
127 UDF_I_LOCATION(inode).logicalBlockNum = block;
128 UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
129 inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0);
130 inode->i_blksize = PAGE_SIZE;
131 inode->i_blocks = 0;
132 UDF_I_LENEATTR(inode) = 0;
133 UDF_I_LENALLOC(inode) = 0;
134 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE))
135 {
136 UDF_I_EXTENDED_FE(inode) = 1;
137 UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE);
138 }
139 else
140 UDF_I_EXTENDED_FE(inode) = 0;
141 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
142 UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_IN_ICB;
143 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
144 UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_SHORT;
145 else
146 UDF_I_ALLOCTYPE(inode) = ICB_FLAG_AD_LONG;
147 inode->i_mtime = inode->i_atime = inode->i_ctime =
148 UDF_I_CRTIME(inode) = CURRENT_TIME;
149 UDF_I_UMTIME(inode) = UDF_I_UCTIME(inode) =
150 UDF_I_UCRTIME(inode) = CURRENT_UTIME;
151 UDF_I_NEW_INODE(inode) = 1;
152 insert_inode_hash(inode);
153 mark_inode_dirty(inode);
154
155 unlock_super(sb);
156 if (DQUOT_ALLOC_INODE(sb, inode))
157 {
158 sb->dq_op->drop(inode);
159 inode->i_nlink = 0;
160 iput(inode);
161 *err = -EDQUOT;
162 return NULL;
163 }
164
165 *err = 0;
166 return inode;
167 }
168