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 void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
32 struct virtio_9p_config
*cfg
;
33 V9fsState
*s
= VIRTIO_9P(vdev
);
36 cfg
= g_malloc0(sizeof(struct virtio_9p_config
) + len
);
37 stw_raw(&cfg
->tag_len
, len
);
38 /* We don't copy the terminating null to config space */
39 memcpy(cfg
->tag
, s
->tag
, len
);
40 memcpy(config
, cfg
, s
->config_size
);
44 static void virtio_9p_device_realize(DeviceState
*dev
, Error
**errp
)
46 VirtIODevice
*vdev
= VIRTIO_DEVICE(dev
);
47 V9fsState
*s
= VIRTIO_9P(dev
);
53 virtio_init(vdev
, "virtio-9p", VIRTIO_ID_9P
,
54 sizeof(struct virtio_9p_config
) + MAX_TAG_LEN
);
56 /* initialize pdu allocator */
57 QLIST_INIT(&s
->free_list
);
58 QLIST_INIT(&s
->active_list
);
59 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
60 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
63 s
->vq
= virtio_add_queue(vdev
, MAX_REQ
, handle_9p_output
);
65 v9fs_path_init(&path
);
67 fse
= get_fsdev_fsentry(s
->fsconf
.fsdev_id
);
70 /* We don't have a fsdev identified by fsdev_id */
71 error_setg(errp
, "Virtio-9p device couldn't find fsdev with the "
73 s
->fsconf
.fsdev_id
? s
->fsconf
.fsdev_id
: "NULL");
78 /* we haven't specified a mount_tag */
79 error_setg(errp
, "fsdev with id %s needs mount_tag arguments",
84 s
->ctx
.export_flags
= fse
->export_flags
;
85 s
->ctx
.fs_root
= g_strdup(fse
->path
);
86 s
->ctx
.exops
.get_st_gen
= NULL
;
87 len
= strlen(s
->fsconf
.tag
);
88 if (len
> MAX_TAG_LEN
- 1) {
89 error_setg(errp
, "mount tag '%s' (%d bytes) is longer than "
90 "maximum (%d bytes)", s
->fsconf
.tag
, len
, MAX_TAG_LEN
- 1);
94 s
->tag
= g_strdup(s
->fsconf
.tag
);
98 s
->config_size
= sizeof(struct virtio_9p_config
) + len
;
100 qemu_co_rwlock_init(&s
->rename_lock
);
102 if (s
->ops
->init(&s
->ctx
) < 0) {
103 error_setg(errp
, "Virtio-9p Failed to initialize fs-driver with id:%s"
104 " and export path:%s", s
->fsconf
.fsdev_id
, s
->ctx
.fs_root
);
107 if (v9fs_init_worker_threads() < 0) {
108 error_setg(errp
, "worker thread initialization failed");
113 * Check details of export path, We need to use fs driver
114 * call back to do that. Since we are in the init path, we don't
115 * use co-routines here.
117 if (s
->ops
->name_to_path(&s
->ctx
, NULL
, "/", &path
) < 0) {
119 "error in converting name to path %s", strerror(errno
));
122 if (s
->ops
->lstat(&s
->ctx
, &path
, &stat
)) {
123 error_setg(errp
, "share path %s does not exist", fse
->path
);
125 } else if (!S_ISDIR(stat
.st_mode
)) {
126 error_setg(errp
, "share path %s is not a directory", fse
->path
);
129 v9fs_path_free(&path
);
133 g_free(s
->ctx
.fs_root
);
135 virtio_cleanup(vdev
);
136 v9fs_path_free(&path
);
139 /* virtio-9p device */
141 static Property virtio_9p_properties
[] = {
142 DEFINE_VIRTIO_9P_PROPERTIES(V9fsState
, fsconf
),
143 DEFINE_PROP_END_OF_LIST(),
146 static void virtio_9p_class_init(ObjectClass
*klass
, void *data
)
148 DeviceClass
*dc
= DEVICE_CLASS(klass
);
149 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_CLASS(klass
);
151 dc
->props
= virtio_9p_properties
;
152 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
153 vdc
->realize
= virtio_9p_device_realize
;
154 vdc
->get_features
= virtio_9p_get_features
;
155 vdc
->get_config
= virtio_9p_get_config
;
158 static const TypeInfo virtio_device_info
= {
159 .name
= TYPE_VIRTIO_9P
,
160 .parent
= TYPE_VIRTIO_DEVICE
,
161 .instance_size
= sizeof(V9fsState
),
162 .class_init
= virtio_9p_class_init
,
165 static void virtio_9p_register_types(void)
167 type_register_static(&virtio_device_info
);
170 type_init(virtio_9p_register_types
)