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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the LGPL.
*/
#include "lib.h"
#include "metadata.h"
#include "import-export.h"
#include "lvm-string.h"
/*
* Bitsets held in the 'status' flags get
* converted into arrays of strings.
*/
struct flag {
int mask;
char *description;
};
static struct flag _vg_flags[] = {
{EXPORTED_VG, "EXPORTED"},
{RESIZEABLE_VG, "RESIZEABLE"},
{PARTIAL_VG, "PARTIAL"},
{LVM_READ, "READ"},
{LVM_WRITE, "WRITE"},
{CLUSTERED, "CLUSTERED"},
{SHARED, "SHARED"},
{0, NULL}
};
static struct flag _pv_flags[] = {
{ALLOCATABLE_PV, "ALLOCATABLE"},
{EXPORTED_VG, "EXPORTED"},
{0, NULL}
};
static struct flag _lv_flags[] = {
{LVM_READ, "READ"},
{LVM_WRITE, "WRITE"},
{FIXED_MINOR, "FIXED_MINOR"},
{VISIBLE_LV, "VISIBLE"},
{0, NULL}
};
static struct flag *_get_flags(int type)
{
switch (type) {
case VG_FLAGS:
return _vg_flags;
case PV_FLAGS:
return _pv_flags;
case LV_FLAGS:
return _lv_flags;
}
log_err("Unknown flag set requested.");
return NULL;
}
static int _emit(char **buffer, size_t *size, const char *fmt, ...)
{
size_t n;
va_list ap;
va_start(ap, fmt);
n = vsnprintf(*buffer, *size, fmt, ap);
va_end(ap);
if (n < 0 || (n == *size))
return 0;
*buffer += n;
*size -= n;
return 1;
}
/*
* Converts a bitset to an array of string values,
* using one of the tables defined at the top of
* the file.
*/
int print_flags(uint32_t status, int type, char *buffer, size_t size)
{
int f, first = 1;
struct flag *flags;
if (!(flags = _get_flags(type))) {
stack;
return 0;
}
if (!_emit(&buffer, &size, "["))
return 0;
for (f = 0; flags[f].mask; f++) {
if (status & flags[f].mask) {
if (!first) {
if (!_emit(&buffer, &size, ", "))
return 0;
} else
first = 0;
if (!_emit(&buffer, &size, "\"%s\"",
flags[f].description))
return 0;
status &= ~flags[f].mask;
}
}
if (!_emit(&buffer, &size, "]"))
return 0;
if (status)
log_error("Metadata inconsistency: Not all flags successfully "
"exported.");
return 1;
}
int read_flags(uint32_t *status, int type, struct config_value *cv)
{
int f;
uint32_t s = 0;
struct flag *flags;
if (!(flags = _get_flags(type))) {
stack;
return 0;
}
if (cv->type == CFG_EMPTY_ARRAY)
goto out;
while (cv) {
if (cv->type != CFG_STRING) {
log_err("Status value is not a string.");
return 0;
}
for (f = 0; flags[f].description; f++)
if (!strcmp(flags[f].description, cv->v.str)) {
s |= flags[f].mask;
break;
}
if (!flags[f].description) {
log_err("Unknown status flag '%s'.", cv->v.str);
return 0;
}
cv = cv->next;
}
out:
*status = s;
return 1;
}
|
