aboutsummaryrefslogtreecommitdiffstats
path: root/fs/udf/udf_sb.h
blob: 663669810be60afbae65f2a262a657f98bfa7f64 (plain) (blame)
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
138
#ifndef __LINUX_UDF_SB_H
#define __LINUX_UDF_SB_H

/* Since UDF 2.01 is ISO 13346 based... */
#define UDF_SUPER_MAGIC			0x15013346

#define UDF_MAX_READ_VERSION		0x0201
#define UDF_MAX_WRITE_VERSION		0x0201

#define UDF_FLAG_USE_EXTENDED_FE	0
#define UDF_VERS_USE_EXTENDED_FE	0x0200
#define UDF_FLAG_USE_STREAMS		1
#define UDF_VERS_USE_STREAMS		0x0200
#define UDF_FLAG_USE_SHORT_AD		2
#define UDF_FLAG_USE_AD_IN_ICB		3
#define UDF_FLAG_USE_FILE_CTIME_EA	4
#define UDF_FLAG_STRICT			5
#define UDF_FLAG_UNDELETE		6
#define UDF_FLAG_UNHIDE			7
#define UDF_FLAG_VARCONV		8
#define UDF_FLAG_NLS_MAP		9
#define UDF_FLAG_UTF8			10

#define UDF_PART_FLAG_UNALLOC_BITMAP	0x0001
#define UDF_PART_FLAG_UNALLOC_TABLE	0x0002
#define UDF_PART_FLAG_FREED_BITMAP	0x0004
#define UDF_PART_FLAG_FREED_TABLE	0x0008
#define UDF_PART_FLAG_READ_ONLY		0x0010
#define UDF_PART_FLAG_WRITE_ONCE	0x0020
#define UDF_PART_FLAG_REWRITABLE	0x0040
#define UDF_PART_FLAG_OVERWRITABLE	0x0080

static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

#define UDF_SB_FREE(X)\
{\
	if (UDF_SB(X))\
	{\
		kfree(UDF_SB_PARTMAPS(X));\
		UDF_SB_PARTMAPS(X) = NULL;\
	}\
}

#define UDF_SB_ALLOC_PARTMAPS(X,Y)\
{\
	UDF_SB_PARTMAPS(X) = kmalloc(sizeof(struct udf_part_map) * Y, GFP_KERNEL);\
	if (UDF_SB_PARTMAPS(X) != NULL)\
	{\
		UDF_SB_NUMPARTS(X) = Y;\
		memset(UDF_SB_PARTMAPS(X), 0x00, sizeof(struct udf_part_map) * Y);\
	}\
	else\
	{\
		UDF_SB_NUMPARTS(X) = 0;\
		udf_error(X, __FUNCTION__, "Unable to allocate space for %d partition maps", Y);\
	}\
}

#define UDF_SB_ALLOC_BITMAP(X,Y,Z)\
{\
	int nr_groups = ((UDF_SB_PARTLEN((X),(Y)) + (sizeof(struct spaceBitmapDesc) << 3) +\
		((X)->s_blocksize * 8) - 1) / ((X)->s_blocksize * 8));\
	int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
	if (size <= PAGE_SIZE)\
		UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap = kmalloc(size, GFP_KERNEL);\
	else\
		UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap = vmalloc(size);\
	if (UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap != NULL)\
	{\
		memset(UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap, 0x00, size);\
		UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_block_bitmap =\
			(struct buffer_head **)(UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap + 1);\
		UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_nr_groups = nr_groups;\
	}\
	else\
	{\
		udf_error(X, __FUNCTION__, "Unable to allocate space for bitmap and %d buffer_head pointers", nr_groups);\
	}\
}

#define UDF_SB_FREE_BITMAP(X,Y,Z)\
{\
	int i;\
	int nr_groups = UDF_SB_BITMAP_NR_GROUPS(X,Y,Z);\
	int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) * nr_groups);\
	for (i=0; i<nr_groups; i++)\
	{\
		if (UDF_SB_BITMAP(X,Y,Z,i))\
			udf_release_data(UDF_SB_BITMAP(X,Y,Z,i));\
	}\
	if (size <= PAGE_SIZE)\
		kfree(UDF_SB_PARTMAPS(X)[Y].Z.s_bitmap);\
	else\
		vfree(UDF_SB_PARTMAPS(X)[Y].Z.s_bitmap);\
}

#define UDF_QUERY_FLAG(X,Y)			( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
#define UDF_SET_FLAG(X,Y)			( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
#define UDF_CLEAR_FLAG(X,Y)			( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )

#define UDF_UPDATE_UDFREV(X,Y)			( ((Y) > UDF_SB_UDFREV(X)) ? UDF_SB_UDFREV(X) = (Y) : UDF_SB_UDFREV(X) )

#define UDF_SB_PARTMAPS(X)			( UDF_SB(X)->s_partmaps )
#define UDF_SB_PARTTYPE(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_partition_type )
#define UDF_SB_PARTROOT(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_partition_root )
#define UDF_SB_PARTLEN(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_partition_len )
#define UDF_SB_PARTVSN(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_volumeseqnum )
#define UDF_SB_PARTNUM(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_partition_num )
#define UDF_SB_TYPESPAR(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_type_specific.s_sparing )
#define UDF_SB_TYPEVIRT(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_type_specific.s_virtual )
#define UDF_SB_PARTFUNC(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_partition_func )
#define UDF_SB_PARTFLAGS(X,Y)			( UDF_SB_PARTMAPS(X)[(Y)].s_partition_flags )
#define UDF_SB_BITMAP(X,Y,Z,I)			( UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_block_bitmap[I] )
#define UDF_SB_BITMAP_NR_GROUPS(X,Y,Z)		( UDF_SB_PARTMAPS(X)[(Y)].Z.s_bitmap->s_nr_groups )

#define UDF_SB_VOLIDENT(X)			( UDF_SB(X)->s_volident )
#define UDF_SB_NUMPARTS(X)			( UDF_SB(X)->s_partitions )
#define UDF_SB_PARTITION(X)			( UDF_SB(X)->s_partition )
#define UDF_SB_SESSION(X)			( UDF_SB(X)->s_session )
#define UDF_SB_ANCHOR(X)			( UDF_SB(X)->s_anchor )
#define UDF_SB_LASTBLOCK(X)			( UDF_SB(X)->s_lastblock )
#define UDF_SB_LVIDBH(X)			( UDF_SB(X)->s_lvidbh )
#define UDF_SB_LVID(X)				( (struct logicalVolIntegrityDesc *)UDF_SB_LVIDBH(X)->b_data )
#define UDF_SB_LVIDIU(X)			( (struct logicalVolIntegrityDescImpUse *)&(UDF_SB_LVID(X)->impUse[le32_to_cpu(UDF_SB_LVID(X)->numOfPartitions) * 2 * sizeof(uint32_t)/sizeof(uint8_t)]) )

#define UDF_SB_UMASK(X)				( UDF_SB(X)->s_umask )
#define UDF_SB_GID(X)				( UDF_SB(X)->s_gid )
#define UDF_SB_UID(X)				( UDF_SB(X)->s_uid )
#define UDF_SB_RECORDTIME(X)			( UDF_SB(X)->s_recordtime )
#define UDF_SB_SERIALNUM(X)			( UDF_SB(X)->s_serialnum )
#define UDF_SB_UDFREV(X)			( UDF_SB(X)->s_udfrev )
#define UDF_SB_FLAGS(X)				( UDF_SB(X)->s_flags )
#define UDF_SB_VAT(X)				( UDF_SB(X)->s_vat )

#endif /* __LINUX_UDF_SB_H */