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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* Virtio 9p backend
*
* Copyright IBM, Corp. 2010
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#include "hw/virtio.h"
#include "hw/pc.h"
#include "qemu_socket.h"
#include "hw/virtio-pci.h"
#include "virtio-9p.h"
#include "fsdev/qemu-fsdev.h"
#include "virtio-9p-xattr.h"
#include "virtio-9p-coth.h"
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
{
features |= 1 << VIRTIO_9P_MOUNT_TAG;
return features;
}
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
{
return (V9fsState *)vdev;
}
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
{
struct virtio_9p_config *cfg;
V9fsState *s = to_virtio_9p(vdev);
cfg = g_malloc0(sizeof(struct virtio_9p_config) +
s->tag_len);
stw_raw(&cfg->tag_len, s->tag_len);
memcpy(cfg->tag, s->tag, s->tag_len);
memcpy(config, cfg, s->config_size);
g_free(cfg);
}
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
{
V9fsState *s;
int i, len;
struct stat stat;
FsTypeEntry *fse;
s = (V9fsState *)virtio_common_init("virtio-9p",
VIRTIO_ID_9P,
sizeof(struct virtio_9p_config)+
MAX_TAG_LEN,
sizeof(V9fsState));
/* initialize pdu allocator */
QLIST_INIT(&s->free_list);
QLIST_INIT(&s->active_list);
for (i = 0; i < (MAX_REQ - 1); i++) {
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
}
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
fse = get_fsdev_fsentry(conf->fsdev_id);
if (!fse) {
/* We don't have a fsdev identified by fsdev_id */
fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
"id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
exit(1);
}
if (!fse->path || !conf->tag) {
/* we haven't specified a mount_tag or the path */
fprintf(stderr, "fsdev with id %s needs path "
"and Virtio-9p device needs mount_tag arguments\n",
conf->fsdev_id);
exit(1);
}
if (!strcmp(fse->security_model, "passthrough")) {
/* Files on the Fileserver set to client user credentials */
s->ctx.fs_sm = SM_PASSTHROUGH;
s->ctx.xops = passthrough_xattr_ops;
} else if (!strcmp(fse->security_model, "mapped")) {
/* Files on the fileserver are set to QEMU credentials.
* Client user credentials are saved in extended attributes.
*/
s->ctx.fs_sm = SM_MAPPED;
s->ctx.xops = mapped_xattr_ops;
} else if (!strcmp(fse->security_model, "none")) {
/*
* Files on the fileserver are set to QEMU credentials.
*/
s->ctx.fs_sm = SM_NONE;
s->ctx.xops = none_xattr_ops;
} else {
fprintf(stderr, "Default to security_model=none. You may want"
" enable advanced security model using "
"security option:\n\t security_model=passthrough\n\t "
"security_model=mapped\n");
s->ctx.fs_sm = SM_NONE;
s->ctx.xops = none_xattr_ops;
}
if (lstat(fse->path, &stat)) {
fprintf(stderr, "share path %s does not exist\n", fse->path);
exit(1);
} else if (!S_ISDIR(stat.st_mode)) {
fprintf(stderr, "share path %s is not a directory\n", fse->path);
exit(1);
}
s->ctx.fs_root = g_strdup(fse->path);
len = strlen(conf->tag);
if (len > MAX_TAG_LEN) {
len = MAX_TAG_LEN;
}
/* s->tag is non-NULL terminated string */
s->tag = g_malloc(len);
memcpy(s->tag, conf->tag, len);
s->tag_len = len;
s->ctx.uid = -1;
s->ctx.flags = 0;
s->ops = fse->ops;
s->vdev.get_features = virtio_9p_get_features;
s->config_size = sizeof(struct virtio_9p_config) +
s->tag_len;
s->vdev.get_config = virtio_9p_get_config;
s->fid_list = NULL;
qemu_co_rwlock_init(&s->rename_lock);
if (s->ops->init(&s->ctx) < 0) {
fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s"
" and export path:%s\n", conf->fsdev_id, s->ctx.fs_root);
exit(1);
}
if (v9fs_init_worker_threads() < 0) {
fprintf(stderr, "worker thread initialization failed\n");
exit(1);
}
return &s->vdev;
}
static int virtio_9p_init_pci(PCIDevice *pci_dev)
{
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
VirtIODevice *vdev;
vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
vdev->nvectors = proxy->nvectors;
virtio_init_pci(proxy, vdev);
/* make the actual value visible */
proxy->nvectors = vdev->nvectors;
return 0;
}
static PCIDeviceInfo virtio_9p_info = {
.qdev.name = "virtio-9p-pci",
.qdev.size = sizeof(VirtIOPCIProxy),
.init = virtio_9p_init_pci,
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET,
.device_id = 0x1009,
.revision = VIRTIO_PCI_ABI_VERSION,
.class_id = 0x2,
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
DEFINE_PROP_END_OF_LIST(),
}
};
static void virtio_9p_register_devices(void)
{
pci_qdev_register(&virtio_9p_info);
virtio_9p_set_fd_limit();
}
device_init(virtio_9p_register_devices)
|
