Root/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/sched.h>
24#include <linux/slab.h>
25
26#include "udf_i.h"
27#include "udf_sb.h"
28
29void udf_free_inode(struct inode *inode)
30{
31    struct super_block *sb = inode->i_sb;
32    struct udf_sb_info *sbi = UDF_SB(sb);
33
34    mutex_lock(&sbi->s_alloc_mutex);
35    if (sbi->s_lvid_bh) {
36        struct logicalVolIntegrityDescImpUse *lvidiu =
37                            udf_sb_lvidiu(sbi);
38        if (S_ISDIR(inode->i_mode))
39            le32_add_cpu(&lvidiu->numDirs, -1);
40        else
41            le32_add_cpu(&lvidiu->numFiles, -1);
42        udf_updated_lvid(sb);
43    }
44    mutex_unlock(&sbi->s_alloc_mutex);
45
46    udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
47}
48
49struct inode *udf_new_inode(struct inode *dir, int mode, int *err)
50{
51    struct super_block *sb = dir->i_sb;
52    struct udf_sb_info *sbi = UDF_SB(sb);
53    struct inode *inode;
54    int block;
55    uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
56    struct udf_inode_info *iinfo;
57    struct udf_inode_info *dinfo = UDF_I(dir);
58
59    inode = new_inode(sb);
60
61    if (!inode) {
62        *err = -ENOMEM;
63        return NULL;
64    }
65    *err = -ENOSPC;
66
67    iinfo = UDF_I(inode);
68    if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
69        iinfo->i_efe = 1;
70        if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
71            sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
72        iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
73                        sizeof(struct extendedFileEntry),
74                        GFP_KERNEL);
75    } else {
76        iinfo->i_efe = 0;
77        iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
78                        sizeof(struct fileEntry),
79                        GFP_KERNEL);
80    }
81    if (!iinfo->i_ext.i_data) {
82        iput(inode);
83        *err = -ENOMEM;
84        return NULL;
85    }
86
87    block = udf_new_block(dir->i_sb, NULL,
88                  dinfo->i_location.partitionReferenceNum,
89                  start, err);
90    if (*err) {
91        iput(inode);
92        return NULL;
93    }
94
95    if (sbi->s_lvid_bh) {
96        struct logicalVolIntegrityDescImpUse *lvidiu;
97
98        iinfo->i_unique = lvid_get_unique_id(sb);
99        mutex_lock(&sbi->s_alloc_mutex);
100        lvidiu = udf_sb_lvidiu(sbi);
101        if (S_ISDIR(mode))
102            le32_add_cpu(&lvidiu->numDirs, 1);
103        else
104            le32_add_cpu(&lvidiu->numFiles, 1);
105        udf_updated_lvid(sb);
106        mutex_unlock(&sbi->s_alloc_mutex);
107    }
108
109    inode_init_owner(inode, dir, mode);
110
111    iinfo->i_location.logicalBlockNum = block;
112    iinfo->i_location.partitionReferenceNum =
113                dinfo->i_location.partitionReferenceNum;
114    inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
115    inode->i_blocks = 0;
116    iinfo->i_lenEAttr = 0;
117    iinfo->i_lenAlloc = 0;
118    iinfo->i_use = 0;
119    if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
120        iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
121    else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
122        iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
123    else
124        iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
125    inode->i_mtime = inode->i_atime = inode->i_ctime =
126        iinfo->i_crtime = current_fs_time(inode->i_sb);
127    insert_inode_hash(inode);
128    mark_inode_dirty(inode);
129
130    *err = 0;
131    return inode;
132}
133

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