File: ialloc.c

package info (click to toggle)
linux 4.19.37-3
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 962,264 kB
  • sloc: ansic: 16,757,120; asm: 271,404; makefile: 38,285; sh: 33,529; perl: 27,681; python: 21,031; cpp: 5,063; yacc: 4,648; lex: 2,585; awk: 1,385; ruby: 25; sed: 5
file content (137 lines) | stat: -rw-r--r-- 3,573 bytes parent folder | download | duplicates (12)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/*
 * ialloc.c
 *
 * PURPOSE
 *	Inode allocation handling routines for the OSTA-UDF(tm) filesystem.
 *
 * COPYRIGHT
 *	This file is distributed under the terms of the GNU General Public
 *	License (GPL). Copies of the GPL can be obtained from:
 *		ftp://prep.ai.mit.edu/pub/gnu/GPL
 *	Each contributing author retains all rights to their own work.
 *
 *  (C) 1998-2001 Ben Fennema
 *
 * HISTORY
 *
 *  02/24/99 blf  Created.
 *
 */

#include "udfdecl.h"
#include <linux/fs.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include "udf_i.h"
#include "udf_sb.h"

void udf_free_inode(struct inode *inode)
{
	struct super_block *sb = inode->i_sb;
	struct udf_sb_info *sbi = UDF_SB(sb);
	struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sb);

	if (lvidiu) {
		mutex_lock(&sbi->s_alloc_mutex);
		if (S_ISDIR(inode->i_mode))
			le32_add_cpu(&lvidiu->numDirs, -1);
		else
			le32_add_cpu(&lvidiu->numFiles, -1);
		udf_updated_lvid(sb);
		mutex_unlock(&sbi->s_alloc_mutex);
	}

	udf_free_blocks(sb, NULL, &UDF_I(inode)->i_location, 0, 1);
}

struct inode *udf_new_inode(struct inode *dir, umode_t mode)
{
	struct super_block *sb = dir->i_sb;
	struct udf_sb_info *sbi = UDF_SB(sb);
	struct inode *inode;
	udf_pblk_t block;
	uint32_t start = UDF_I(dir)->i_location.logicalBlockNum;
	struct udf_inode_info *iinfo;
	struct udf_inode_info *dinfo = UDF_I(dir);
	struct logicalVolIntegrityDescImpUse *lvidiu;
	int err;

	inode = new_inode(sb);

	if (!inode)
		return ERR_PTR(-ENOMEM);

	iinfo = UDF_I(inode);
	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) {
		iinfo->i_efe = 1;
		if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev)
			sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE;
		iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
					    sizeof(struct extendedFileEntry),
					    GFP_KERNEL);
	} else {
		iinfo->i_efe = 0;
		iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize -
					    sizeof(struct fileEntry),
					    GFP_KERNEL);
	}
	if (!iinfo->i_ext.i_data) {
		iput(inode);
		return ERR_PTR(-ENOMEM);
	}

	err = -ENOSPC;
	block = udf_new_block(dir->i_sb, NULL,
			      dinfo->i_location.partitionReferenceNum,
			      start, &err);
	if (err) {
		iput(inode);
		return ERR_PTR(err);
	}

	lvidiu = udf_sb_lvidiu(sb);
	if (lvidiu) {
		iinfo->i_unique = lvid_get_unique_id(sb);
		inode->i_generation = iinfo->i_unique;
		mutex_lock(&sbi->s_alloc_mutex);
		if (S_ISDIR(mode))
			le32_add_cpu(&lvidiu->numDirs, 1);
		else
			le32_add_cpu(&lvidiu->numFiles, 1);
		udf_updated_lvid(sb);
		mutex_unlock(&sbi->s_alloc_mutex);
	}

	inode_init_owner(inode, dir, mode);
	if (UDF_QUERY_FLAG(sb, UDF_FLAG_UID_SET))
		inode->i_uid = sbi->s_uid;
	if (UDF_QUERY_FLAG(sb, UDF_FLAG_GID_SET))
		inode->i_gid = sbi->s_gid;

	iinfo->i_location.logicalBlockNum = block;
	iinfo->i_location.partitionReferenceNum =
				dinfo->i_location.partitionReferenceNum;
	inode->i_ino = udf_get_lb_pblock(sb, &iinfo->i_location, 0);
	inode->i_blocks = 0;
	iinfo->i_lenEAttr = 0;
	iinfo->i_lenAlloc = 0;
	iinfo->i_use = 0;
	iinfo->i_checkpoint = 1;
	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
		iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
	else
		iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
	iinfo->i_crtime = inode->i_mtime;
	if (unlikely(insert_inode_locked(inode) < 0)) {
		make_bad_inode(inode);
		iput(inode);
		return ERR_PTR(-EIO);
	}
	mark_inode_dirty(inode);

	return inode;
}