Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[linux-2.6] / fs / udf / ialloc.c
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/sched.h>
25 #include <linux/slab.h>
26
27 #include "udf_i.h"
28 #include "udf_sb.h"
29
30 void udf_free_inode(struct inode *inode)
31 {
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
44         mutex_lock(&sbi->s_alloc_mutex);
45         if (sbi->s_lvid_bh) {
46                 struct logicalVolIntegrityDescImpUse *lvidiu =
47                                                         udf_sb_lvidiu(sbi);
48                 if (S_ISDIR(inode->i_mode))
49                         le32_add_cpu(&lvidiu->numDirs, -1);
50                 else
51                         le32_add_cpu(&lvidiu->numFiles, -1);
52
53                 mark_buffer_dirty(sbi->s_lvid_bh);
54         }
55         mutex_unlock(&sbi->s_alloc_mutex);
56
57         udf_free_blocks(sb, NULL, UDF_I(inode)->i_location, 0, 1);
58 }
59
60 struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
61 {
62         struct super_block *sb = dir->i_sb;
63         struct udf_sb_info *sbi = UDF_SB(sb);
64         struct inode *inode;
65         int block;
66         uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
67         struct udf_inode_info *iinfo;
68         struct udf_inode_info *dinfo = UDF_I(dir);
69
70         inode = new_inode(sb);
71
72         if (!inode) {
73                 *err = -ENOMEM;
74                 return NULL;
75         }
76         *err = -ENOSPC;
77
78         iinfo = UDF_I(inode);
79         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         }
97
98         block = udf_new_block(dir->i_sb, NULL,
99                               dinfo->i_location.partitionReferenceNum,
100                               start, err);
101         if (*err) {
102                 iput(inode);
103                 return NULL;
104         }
105
106         mutex_lock(&sbi->s_alloc_mutex);
107         if (sbi->s_lvid_bh) {
108                 struct logicalVolIntegrityDesc *lvid =
109                         (struct logicalVolIntegrityDesc *)
110                         sbi->s_lvid_bh->b_data;
111                 struct logicalVolIntegrityDescImpUse *lvidiu =
112                                                         udf_sb_lvidiu(sbi);
113                 struct logicalVolHeaderDesc *lvhd;
114                 uint64_t uniqueID;
115                 lvhd = (struct logicalVolHeaderDesc *)
116                                 (lvid->logicalVolContentsUse);
117                 if (S_ISDIR(mode))
118                         le32_add_cpu(&lvidiu->numDirs, 1);
119                 else
120                         le32_add_cpu(&lvidiu->numFiles, 1);
121                 iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID);
122                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
123                         uniqueID += 16;
124                 lvhd->uniqueID = cpu_to_le64(uniqueID);
125                 mark_buffer_dirty(sbi->s_lvid_bh);
126         }
127         mutex_unlock(&sbi->s_alloc_mutex);
128         inode->i_mode = mode;
129         inode->i_uid = current->fsuid;
130         if (dir->i_mode & S_ISGID) {
131                 inode->i_gid = dir->i_gid;
132                 if (S_ISDIR(mode))
133                         mode |= S_ISGID;
134         } else {
135                 inode->i_gid = current->fsgid;
136         }
137
138         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);
142         inode->i_blocks = 0;
143         iinfo->i_lenEAttr = 0;
144         iinfo->i_lenAlloc = 0;
145         iinfo->i_use = 0;
146         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
147                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
148         else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
149                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
150         else
151                 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
152         inode->i_mtime = inode->i_atime = inode->i_ctime =
153                 iinfo->i_crtime = current_fs_time(inode->i_sb);
154         insert_inode_hash(inode);
155         mark_inode_dirty(inode);
156
157         if (DQUOT_ALLOC_INODE(inode)) {
158                 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 }