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
|
/*
* USB Mass Storage Device emulation
*
* Copyright (c) 2006 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the LGPL.
*/
#include "qemu/osdep.h"
#include "qemu/typedefs.h"
#include "qapi/error.h"
#include "qapi/visitor.h"
#include "hw/usb.h"
#include "hw/usb/desc.h"
#include "hw/usb/msd.h"
#include "sysemu/sysemu.h"
#include "sysemu/block-backend.h"
static const struct SCSIBusInfo usb_msd_scsi_info_storage = {
.tcq = false,
.max_target = 0,
.max_lun = 0,
.transfer_data = usb_msd_transfer_data,
.complete = usb_msd_command_complete,
.cancel = usb_msd_request_cancelled,
.load_request = usb_msd_load_request,
};
static void usb_msd_storage_realize(USBDevice *dev, Error **errp)
{
MSDState *s = USB_STORAGE_DEV(dev);
BlockBackend *blk = s->conf.blk;
SCSIDevice *scsi_dev;
if (!blk) {
error_setg(errp, "drive property not set");
return;
}
if (!blkconf_blocksizes(&s->conf, errp)) {
return;
}
if (!blkconf_apply_backend_options(&s->conf, !blk_supports_write_perm(blk),
true, errp)) {
return;
}
/*
* Hack alert: this pretends to be a block device, but it's really
* a SCSI bus that can serve only a single device, which it
* creates automatically. But first it needs to detach from its
* blockdev, or else scsi_bus_legacy_add_drive() dies when it
* attaches again. We also need to take another reference so that
* blk_detach_dev() doesn't free blk while we still need it.
*
* The hack is probably a bad idea.
*/
blk_ref(blk);
blk_detach_dev(blk, DEVICE(s));
s->conf.blk = NULL;
usb_desc_create_serial(dev);
usb_desc_init(dev);
dev->flags |= (1 << USB_DEV_FLAG_IS_SCSI_STORAGE);
scsi_bus_new(&s->bus, sizeof(s->bus), DEVICE(dev),
&usb_msd_scsi_info_storage, NULL);
scsi_dev = scsi_bus_legacy_add_drive(&s->bus, blk, 0, !!s->removable,
s->conf.bootindex, s->conf.share_rw,
s->conf.rerror, s->conf.werror,
dev->serial,
errp);
blk_unref(blk);
if (!scsi_dev) {
return;
}
usb_msd_handle_reset(dev);
s->scsi_dev = scsi_dev;
}
static Property msd_properties[] = {
DEFINE_BLOCK_PROPERTIES(MSDState, conf),
DEFINE_BLOCK_ERROR_PROPERTIES(MSDState, conf),
DEFINE_PROP_BOOL("removable", MSDState, removable, false),
DEFINE_PROP_BOOL("commandlog", MSDState, commandlog, false),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_msd_class_storage_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->realize = usb_msd_storage_realize;
device_class_set_props(dc, msd_properties);
}
static void usb_msd_get_bootindex(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
USBDevice *dev = USB_DEVICE(obj);
MSDState *s = USB_STORAGE_DEV(dev);
visit_type_int32(v, name, &s->conf.bootindex, errp);
}
static void usb_msd_set_bootindex(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
USBDevice *dev = USB_DEVICE(obj);
MSDState *s = USB_STORAGE_DEV(dev);
int32_t boot_index;
Error *local_err = NULL;
if (!visit_type_int32(v, name, &boot_index, errp)) {
return;
}
/* check whether bootindex is present in fw_boot_order list */
check_boot_index(boot_index, &local_err);
if (local_err) {
goto out;
}
/* change bootindex to a new one */
s->conf.bootindex = boot_index;
if (s->scsi_dev) {
object_property_set_int(OBJECT(s->scsi_dev), "bootindex", boot_index,
&error_abort);
}
out:
error_propagate(errp, local_err);
}
static void usb_msd_instance_init(Object *obj)
{
object_property_add(obj, "bootindex", "int32",
usb_msd_get_bootindex,
usb_msd_set_bootindex, NULL, NULL);
object_property_set_int(obj, "bootindex", -1, NULL);
}
static const TypeInfo msd_info = {
.name = "usb-storage",
.parent = TYPE_USB_STORAGE,
.class_init = usb_msd_class_storage_initfn,
.instance_init = usb_msd_instance_init,
};
static void register_types(void)
{
type_register_static(&msd_info);
}
type_init(register_types)
|
