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.
127 if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
129 if (s->ops->name_to_path(&s->ctx, NULL, "\\", &path) < 0) {
130 #endif /* CONFIG_WIN32 */
132 if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
133 #endif /* CONFIG_MARU */
135 "error in converting name to path %s", strerror(errno));
138 if (s->ops->lstat(&s->ctx, &path, &stat)) {
139 error_setg(errp, "share path %s does not exist", fse->path);
141 } else if (!S_ISDIR(stat.st_mode)) {
142 error_setg(errp, "share path %s is not a directory", fse->path);
146 v9fs_path_free(&path);
148 register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s);
151 g_free(s->ctx.fs_root);
153 virtio_cleanup(vdev);
154 v9fs_path_free(&path);
157 static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
159 VirtIODevice *vdev = VIRTIO_DEVICE(dev);
160 V9fsState *s = VIRTIO_9P(dev);
162 virtio_cleanup(vdev);
163 unregister_savevm(dev, "virtio-9p", s);
164 g_free(s->ctx.fs_root);
168 /* virtio-9p device */
170 static Property virtio_9p_properties[] = {
171 DEFINE_PROP_STRING("mount_tag", V9fsState, fsconf.tag),
172 DEFINE_PROP_STRING("fsdev", V9fsState, fsconf.fsdev_id),
173 DEFINE_PROP_END_OF_LIST(),
176 static void virtio_9p_class_init(ObjectClass *klass, void *data)
178 DeviceClass *dc = DEVICE_CLASS(klass);
179 VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
181 dc->props = virtio_9p_properties;
182 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
183 vdc->realize = virtio_9p_device_realize;
184 vdc->unrealize = virtio_9p_device_unrealize;
185 vdc->get_features = virtio_9p_get_features;
186 vdc->get_config = virtio_9p_get_config;
189 static const TypeInfo virtio_device_info = {
190 .name = TYPE_VIRTIO_9P,
191 .parent = TYPE_VIRTIO_DEVICE,
192 .instance_size = sizeof(V9fsState),
193 .class_init = virtio_9p_class_init,
196 static void virtio_9p_register_types(void)
198 type_register_static(&virtio_device_info);
201 type_init(virtio_9p_register_types)