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
|
/*
* Evms topology
* -- this is fallback for old systems where the topology information is not
* exported by sysfs
*
* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
*
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
*
*/
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "topology.h"
#define EVMS_MAJOR 117
#ifndef _IOT__IOTBASE_u_int32_t
#define _IOT__IOTBASE_u_int32_t IOT_SIMPLE(uint32_t)
#endif
#define _IOT_evms_stripe_info _IOT (_IOTS(uint32_t), 2, 0, 0, 0, 0)
#define EVMS_GET_STRIPE_INFO _IOR(EVMS_MAJOR, 0xF0, struct evms_stripe_info)
struct evms_stripe_info {
uint32_t size; /* stripe unit 512-byte blocks */
uint32_t width; /* the number of stripe members or RAID data disks */
};
static int is_evms_device(dev_t devno)
{
if (major(devno) == EVMS_MAJOR)
return 1;
return blkid_driver_has_major("evms", major(devno));
}
static int probe_evms_tp(blkid_probe pr,
const struct blkid_idmag *mag __attribute__((__unused__)))
{
struct evms_stripe_info evms;
dev_t devno = blkid_probe_get_devno(pr);
if (!devno)
goto nothing; /* probably not a block device */
if (!is_evms_device(devno))
goto nothing;
memset(&evms, 0, sizeof(evms));
if (ioctl(pr->fd, EVMS_GET_STRIPE_INFO, &evms))
goto nothing;
blkid_topology_set_minimum_io_size(pr, evms.size << 9);
blkid_topology_set_optimal_io_size(pr, (evms.size * evms.width) << 9);
return 0;
nothing:
return 1;
}
const struct blkid_idinfo evms_tp_idinfo =
{
.name = "evms",
.probefunc = probe_evms_tp,
.magics = BLKID_NONE_MAGIC
};
|
