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192.168.1.100 / T800 / 761f995d19a8fe9b32548c59a89cbbb0025fe90d / . / src / kernel / linux / v4.19 / fs / udf / ialloc.c
blob: f8e5872f7cc271d93ad6c27e34add63ebbc2c2f2 [file] [log] [blame]
xjb04a4022021-11-25 15:01:52 +0800[diff] [blame]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 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
48struct 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_ext.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_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
76 sizeof(struct fileEntry),
77 GFP_KERNEL);
78 }
79 if (!iinfo->i_ext.i_data) {
80 iput(inode);
81 return ERR_PTR(-ENOMEM);
82 }
83
84 err = -ENOSPC;
85 block = udf_new_block(dir->i_sb, NULL,
86 dinfo->i_location.partitionReferenceNum,
87 start, &err);
88 if (err) {
89 iput(inode);
90 return ERR_PTR(err);
91 }
92
93 lvidiu = udf_sb_lvidiu(sb);
94 if (lvidiu) {
95 iinfo->i_unique = lvid_get_unique_id(sb);
96 inode->i_generation = iinfo->i_unique;
97 mutex_lock(&sbi->s_alloc_mutex);
98 if (S_ISDIR(mode))
99 le32_add_cpu(&lvidiu->numDirs, 1);
100 else
101 le32_add_cpu(&lvidiu->numFiles, 1);
102 udf_updated_lvid(sb);
103 mutex_unlock(&sbi->s_alloc_mutex);
104 }
105
106 inode_init_owner(inode, dir, mode);
107 if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
108 inode->i_uid = sbi->s_uid;
109 if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
110 inode->i_gid = sbi->s_gid;
111
112 iinfo->i_location.logicalBlockNum = block;
113 iinfo->i_location.partitionReferenceNum =
114 dinfo->i_location.partitionReferenceNum;
115 inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
116 inode->i_blocks = 0;
117 iinfo->i_lenEAttr = 0;
118 iinfo->i_lenAlloc = 0;
119 iinfo->i_use = 0;
120 iinfo->i_checkpoint = 1;
121 if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
122 iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
123 else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
124 iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
125 else
126 iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
127 inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
128 iinfo->i_crtime = inode->i_mtime;
129 if (unlikely(insert_inode_locked(inode) < 0)) {
130 make_bad_inode(inode);
131 iput(inode);
132 return ERR_PTR(-EIO);
133 }
134 mark_inode_dirty(inode);
135
136 return inode;
137}