4 * Copyright IBM, Corp. 2010
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #include "hw/virtio/virtio.h"
15 #include "hw/virtio/virtio-9p.h"
16 #include "hw/i386/pc.h"
17 #include "qemu/sockets.h"
18 #include "virtio-9p.h"
19 #include "fsdev/qemu-fsdev.h"
20 #include "virtio-9p-xattr.h"
21 #include "virtio-9p-coth.h"
23 static uint32_t virtio_9p_get_features(VirtIODevice
*vdev
, uint32_t features
)
25 features
|= 1 << VIRTIO_9P_MOUNT_TAG
;
29 static V9fsState
*to_virtio_9p(VirtIODevice
*vdev
)
31 return (V9fsState
*)vdev
;
34 static void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
37 struct virtio_9p_config
*cfg
;
38 V9fsState
*s
= to_virtio_9p(vdev
);
41 cfg
= g_malloc0(sizeof(struct virtio_9p_config
) + len
);
42 stw_raw(&cfg
->tag_len
, len
);
43 /* We don't copy the terminating null to config space */
44 memcpy(cfg
->tag
, s
->tag
, len
);
45 memcpy(config
, cfg
, s
->config_size
);
49 static VirtIODevice
*virtio_9p_common_init(DeviceState
*dev
, V9fsConf
*conf
,
59 * We have two cases here: the old virtio-9p-pci device, and the
60 * refactored virtio-9p.
64 s
= (V9fsState
*)virtio_common_init("virtio-9p",
66 sizeof(struct virtio_9p_config
)+
70 virtio_init(VIRTIO_DEVICE(s
), "virtio-9p", VIRTIO_ID_9P
,
71 sizeof(struct virtio_9p_config
) + MAX_TAG_LEN
);
73 /* initialize pdu allocator */
74 QLIST_INIT(&s
->free_list
);
75 QLIST_INIT(&s
->active_list
);
76 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
77 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
80 s
->vq
= virtio_add_queue(&s
->vdev
, MAX_REQ
, handle_9p_output
);
82 fse
= get_fsdev_fsentry(conf
->fsdev_id
);
85 /* We don't have a fsdev identified by fsdev_id */
86 fprintf(stderr
, "Virtio-9p device couldn't find fsdev with the "
87 "id = %s\n", conf
->fsdev_id
? conf
->fsdev_id
: "NULL");
92 /* we haven't specified a mount_tag */
93 fprintf(stderr
, "fsdev with id %s needs mount_tag arguments\n",
98 s
->ctx
.export_flags
= fse
->export_flags
;
99 s
->ctx
.fs_root
= g_strdup(fse
->path
);
100 s
->ctx
.exops
.get_st_gen
= NULL
;
101 len
= strlen(conf
->tag
);
102 if (len
> MAX_TAG_LEN
- 1) {
103 fprintf(stderr
, "mount tag '%s' (%d bytes) is longer than "
104 "maximum (%d bytes)", conf
->tag
, len
, MAX_TAG_LEN
- 1);
108 s
->tag
= g_strdup(conf
->tag
);
112 s
->vdev
.get_features
= virtio_9p_get_features
;
113 s
->config_size
= sizeof(struct virtio_9p_config
) + len
;
114 s
->vdev
.get_config
= virtio_9p_get_config
;
116 qemu_co_rwlock_init(&s
->rename_lock
);
118 if (s
->ops
->init(&s
->ctx
) < 0) {
119 fprintf(stderr
, "Virtio-9p Failed to initialize fs-driver with id:%s"
120 " and export path:%s\n", conf
->fsdev_id
, s
->ctx
.fs_root
);
123 if (v9fs_init_worker_threads() < 0) {
124 fprintf(stderr
, "worker thread initialization failed\n");
129 * Check details of export path, We need to use fs driver
130 * call back to do that. Since we are in the init path, we don't
131 * use co-routines here.
133 v9fs_path_init(&path
);
134 if (s
->ops
->name_to_path(&s
->ctx
, NULL
, "/", &path
) < 0) {
136 "error in converting name to path %s", strerror(errno
));
139 if (s
->ops
->lstat(&s
->ctx
, &path
, &stat
)) {
140 fprintf(stderr
, "share path %s does not exist\n", fse
->path
);
142 } else if (!S_ISDIR(stat
.st_mode
)) {
143 fprintf(stderr
, "share path %s is not a directory\n", fse
->path
);
146 v9fs_path_free(&path
);
151 VirtIODevice
*virtio_9p_init(DeviceState
*dev
, V9fsConf
*conf
)
154 return virtio_9p_common_init(dev
, conf
, &s
);
157 /* virtio-9p device */
159 static int virtio_9p_device_init(VirtIODevice
*vdev
)
161 DeviceState
*qdev
= DEVICE(vdev
);
162 V9fsState
*s
= VIRTIO_9P(vdev
);
163 V9fsConf
*fsconf
= &(s
->fsconf
);
164 if (virtio_9p_common_init(qdev
, fsconf
, &s
) == NULL
) {
170 static Property virtio_9p_properties
[] = {
171 DEFINE_VIRTIO_9P_PROPERTIES(V9fsState
, fsconf
),
172 DEFINE_PROP_END_OF_LIST(),
175 static void virtio_9p_class_init(ObjectClass
*klass
, void *data
)
177 DeviceClass
*dc
= DEVICE_CLASS(klass
);
178 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_CLASS(klass
);
179 dc
->props
= virtio_9p_properties
;
180 vdc
->init
= virtio_9p_device_init
;
181 vdc
->get_features
= virtio_9p_get_features
;
182 vdc
->get_config
= virtio_9p_get_config
;
185 static const TypeInfo virtio_device_info
= {
186 .name
= TYPE_VIRTIO_9P
,
187 .parent
= TYPE_VIRTIO_DEVICE
,
188 .instance_size
= sizeof(V9fsState
),
189 .class_init
= virtio_9p_class_init
,
192 static void virtio_9p_register_types(void)
194 type_register_static(&virtio_device_info
);
197 type_init(virtio_9p_register_types
)