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"
22 #include "hw/virtio/virtio-access.h"
24 static uint64_t virtio_9p_get_features(VirtIODevice
*vdev
, uint64_t features
,
27 virtio_add_feature(&features
, VIRTIO_9P_MOUNT_TAG
);
31 static void virtio_9p_get_config(VirtIODevice
*vdev
, uint8_t *config
)
34 struct virtio_9p_config
*cfg
;
35 V9fsState
*s
= VIRTIO_9P(vdev
);
38 cfg
= g_malloc0(sizeof(struct virtio_9p_config
) + len
);
39 virtio_stw_p(vdev
, &cfg
->tag_len
, len
);
40 /* We don't copy the terminating null to config space */
41 memcpy(cfg
->tag
, s
->tag
, len
);
42 memcpy(config
, cfg
, s
->config_size
);
46 static void virtio_9p_save(QEMUFile
*f
, void *opaque
)
48 virtio_save(VIRTIO_DEVICE(opaque
), f
);
51 static int virtio_9p_load(QEMUFile
*f
, void *opaque
, int version_id
)
53 return virtio_load(VIRTIO_DEVICE(opaque
), f
, version_id
);
56 static void virtio_9p_device_realize(DeviceState
*dev
, Error
**errp
)
58 VirtIODevice
*vdev
= VIRTIO_DEVICE(dev
);
59 V9fsState
*s
= VIRTIO_9P(dev
);
65 virtio_init(vdev
, "virtio-9p", VIRTIO_ID_9P
,
66 sizeof(struct virtio_9p_config
) + MAX_TAG_LEN
);
68 /* initialize pdu allocator */
69 QLIST_INIT(&s
->free_list
);
70 QLIST_INIT(&s
->active_list
);
71 for (i
= 0; i
< (MAX_REQ
- 1); i
++) {
72 QLIST_INSERT_HEAD(&s
->free_list
, &s
->pdus
[i
], next
);
75 s
->vq
= virtio_add_queue(vdev
, MAX_REQ
, handle_9p_output
);
77 v9fs_path_init(&path
);
79 fse
= get_fsdev_fsentry(s
->fsconf
.fsdev_id
);
82 /* We don't have a fsdev identified by fsdev_id */
83 error_setg(errp
, "Virtio-9p device couldn't find fsdev with the "
85 s
->fsconf
.fsdev_id
? s
->fsconf
.fsdev_id
: "NULL");
90 /* we haven't specified a mount_tag */
91 error_setg(errp
, "fsdev with id %s needs mount_tag arguments",
96 s
->ctx
.export_flags
= fse
->export_flags
;
97 s
->ctx
.fs_root
= g_strdup(fse
->path
);
98 s
->ctx
.exops
.get_st_gen
= NULL
;
99 len
= strlen(s
->fsconf
.tag
);
100 if (len
> MAX_TAG_LEN
- 1) {
101 error_setg(errp
, "mount tag '%s' (%d bytes) is longer than "
102 "maximum (%d bytes)", s
->fsconf
.tag
, len
, MAX_TAG_LEN
- 1);
106 s
->tag
= g_strdup(s
->fsconf
.tag
);
110 s
->config_size
= sizeof(struct virtio_9p_config
) + len
;
112 qemu_co_rwlock_init(&s
->rename_lock
);
114 if (s
->ops
->init(&s
->ctx
) < 0) {
115 error_setg(errp
, "Virtio-9p Failed to initialize fs-driver with id:%s"
116 " and export path:%s", s
->fsconf
.fsdev_id
, s
->ctx
.fs_root
);
121 * Check details of export path, We need to use fs driver
122 * call back to do that. Since we are in the init path, we don't
123 * use co-routines here.
125 if (s
->ops
->name_to_path(&s
->ctx
, NULL
, "/", &path
) < 0) {
127 "error in converting name to path %s", strerror(errno
));
130 if (s
->ops
->lstat(&s
->ctx
, &path
, &stat
)) {
131 error_setg(errp
, "share path %s does not exist", fse
->path
);
133 } else if (!S_ISDIR(stat
.st_mode
)) {
134 error_setg(errp
, "share path %s is not a directory", fse
->path
);
137 v9fs_path_free(&path
);
139 register_savevm(dev
, "virtio-9p", -1, 1, virtio_9p_save
, virtio_9p_load
, s
);
142 g_free(s
->ctx
.fs_root
);
144 virtio_cleanup(vdev
);
145 v9fs_path_free(&path
);
148 /* virtio-9p device */
150 static Property virtio_9p_properties
[] = {
151 DEFINE_PROP_STRING("mount_tag", V9fsState
, fsconf
.tag
),
152 DEFINE_PROP_STRING("fsdev", V9fsState
, fsconf
.fsdev_id
),
153 DEFINE_PROP_END_OF_LIST(),
156 static void virtio_9p_class_init(ObjectClass
*klass
, void *data
)
158 DeviceClass
*dc
= DEVICE_CLASS(klass
);
159 VirtioDeviceClass
*vdc
= VIRTIO_DEVICE_CLASS(klass
);
161 dc
->props
= virtio_9p_properties
;
162 set_bit(DEVICE_CATEGORY_STORAGE
, dc
->categories
);
163 vdc
->realize
= virtio_9p_device_realize
;
164 vdc
->get_features
= virtio_9p_get_features
;
165 vdc
->get_config
= virtio_9p_get_config
;
168 static const TypeInfo virtio_device_info
= {
169 .name
= TYPE_VIRTIO_9P
,
170 .parent
= TYPE_VIRTIO_DEVICE
,
171 .instance_size
= sizeof(V9fsState
),
172 .class_init
= virtio_9p_class_init
,
175 static void virtio_9p_register_types(void)
177 type_register_static(&virtio_device_info
);
180 type_init(virtio_9p_register_types
)