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
udf_free_inode(struct inode * inode)29 void 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 struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);
34
35 if (lvidiu) {
36 mutex_lock(&sbi->s_alloc_mutex);
37 if (S_ISDIR(inode->i_mode))
38 le32_add_cpu(&lvidiu->numDirs, -1);
39 else
40 le32_add_cpu(&lvidiu->numFiles, -1);
41 udf_updated_lvid(sb);
42 mutex_unlock(&sbi->s_alloc_mutex);
43 }
44
45 udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
46 }
47
udf_new_inode(struct inode * dir,umode_t mode)48 struct inode *udf_new_inode(struct inode *dir, umode_t mode)
49 {
50 struct super_block *sb = dir->i_sb;
51 struct udf_sb_info *sbi = UDF_SB(sb);
52 struct inode *inode;
53 udf_pblk_t block;
54 uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
55 struct udf_inode_info *iinfo;
56 struct udf_inode_info *dinfo = UDF_I(dir);
57 struct logicalVolIntegrityDescImpUse *lvidiu;
58 int err;
59
60 inode = new_inode(sb);
61
62 if (!inode)
63 return ERR_PTR(-ENOMEM);
64
65 iinfo = UDF_I(inode);
66 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
67 iinfo->i_efe = 1;
68 if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
69 sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
70 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
71 sizeof(struct extendedFileEntry),
72 GFP_KERNEL);
73 } else {
74 iinfo->i_efe = 0;
75 iinfo->i_data = kzalloc(inode->i_sb->s_blocksize -
76 sizeof(struct fileEntry),
77 GFP_KERNEL);
78 }
79 if (!iinfo->i_data) {
80 make_bad_inode(inode);
81 iput(inode);
82 return ERR_PTR(-ENOMEM);
83 }
84
85 err = -ENOSPC;
86 block = udf_new_block(dir->i_sb, NULL,
87 dinfo->i_location.partitionReferenceNum,
88 start, &err);
89 if (err) {
90 make_bad_inode(inode);
91 iput(inode);
92 return ERR_PTR(err);
93 }
94
95 lvidiu = udf_sb_lvidiu(sb);
96 if (lvidiu) {
97 iinfo->i_unique = lvid_get_unique_id(sb);
98 inode->i_generation = iinfo->i_unique;
99 mutex_lock(&sbi->s_alloc_mutex);
100 if (S_ISDIR(mode))
101 le32_add_cpu(&lvidiu->numDirs, 1);
102 else
103 le32_add_cpu(&lvidiu->numFiles, 1);
104 udf_updated_lvid(sb);
105 mutex_unlock(&sbi->s_alloc_mutex);
106 }
107
108 inode_init_owner(&init_user_ns, inode, dir, mode);
109 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
110 inode->i_uid = sbi->s_uid;
111 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
112 inode->i_gid = sbi->s_gid;
113
114 iinfo->i_location.logicalBlockNum = block;
115 iinfo->i_location.partitionReferenceNum =
116 dinfo->i_location.partitionReferenceNum;
117 inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
118 inode->i_blocks = 0;
119 iinfo->i_lenEAttr = 0;
120 iinfo->i_lenAlloc = 0;
121 iinfo->i_use = 0;
122 iinfo->i_checkpoint = 1;
123 iinfo->i_extraPerms = FE_PERM_U_CHATTR;
124 udf_update_extra_perms(inode, mode);
125
126 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
127 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
128 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
129 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
130 else
131 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
132 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
133 iinfo->i_crtime = inode->i_mtime;
134 if (unlikely(insert_inode_locked(inode) < 0)) {
135 make_bad_inode(inode);
136 iput(inode);
137 return ERR_PTR(-EIO);
138 }
139 mark_inode_dirty(inode);
140
141 return inode;
142 }
143