remove pointers to the defunct UDF mailing list
[linux-2.6.git] / 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/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         down(&sbi->s_alloc_sem);
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         }
56         up(&sbi->s_alloc_sem);
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
78         block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum,
79                 start, err);
80         if (*err)
81         {
82                 iput(inode);
83                 return NULL;
84         }
85
86         down(&sbi->s_alloc_sem);
87         UDF_I_UNIQUE(inode) = 0;
88         UDF_I_LENEXTENTS(inode) = 0;
89         UDF_I_NEXT_ALLOC_BLOCK(inode) = 0;
90         UDF_I_NEXT_ALLOC_GOAL(inode) = 0;
91         UDF_I_STRAT4096(inode) = 0;
92         if (UDF_SB_LVIDBH(sb))
93         {
94                 struct logicalVolHeaderDesc *lvhd;
95                 uint64_t uniqueID;
96                 lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse);
97                 if (S_ISDIR(mode))
98                         UDF_SB_LVIDIU(sb)->numDirs =
99                                 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1);
100                 else
101                         UDF_SB_LVIDIU(sb)->numFiles =
102                                 cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1);
103                 UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID);
104                 if (!(++uniqueID & 0x00000000FFFFFFFFUL))
105                         uniqueID += 16;
106                 lvhd->uniqueID = cpu_to_le64(uniqueID);
107                 mark_buffer_dirty(UDF_SB_LVIDBH(sb));
108         }
109         inode->i_mode = mode;
110         inode->i_uid = current->fsuid;
111         if (dir->i_mode & S_ISGID)
112         {
113                 inode->i_gid = dir->i_gid;
114                 if (S_ISDIR(mode))
115                         mode |= S_ISGID;
116         }
117         else
118                 inode->i_gid = current->fsgid;
119
120         UDF_I_LOCATION(inode).logicalBlockNum = block;
121         UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum;
122         inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0);
123         inode->i_blksize = PAGE_SIZE;
124         inode->i_blocks = 0;
125         UDF_I_LENEATTR(inode) = 0;
126         UDF_I_LENALLOC(inode) = 0;
127         UDF_I_USE(inode) = 0;
128         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE))
129         {
130                 UDF_I_EFE(inode) = 1;
131                 UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE);
132                 UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL);
133                 memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry));
134         }
135         else
136         {
137                 UDF_I_EFE(inode) = 0;
138                 UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL);
139                 memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct fileEntry));
140         }
141         if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
142                 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB;
143         else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
144                 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT;
145         else
146                 UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG;
147         inode->i_mtime = inode->i_atime = inode->i_ctime =
148                 UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb);
149         insert_inode_hash(inode);
150         mark_inode_dirty(inode);
151         up(&sbi->s_alloc_sem);
152
153         if (DQUOT_ALLOC_INODE(inode))
154         {
155                 DQUOT_DROP(inode);
156                 inode->i_flags |= S_NOQUOTA;
157                 inode->i_nlink = 0;
158                 iput(inode);
159                 *err = -EDQUOT;
160                 return NULL;
161         }
162
163         *err = 0;
164         return inode;
165 }