4 * Copyright IBM, Corp. 2010
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.h"
16 #include "qemu_socket.h"
17 #include "hw/virtio-pci.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 VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
57 s = (V9fsState *)virtio_common_init("virtio-9p",
59 sizeof(struct virtio_9p_config)+
62 /* initialize pdu allocator */
63 QLIST_INIT(&s->free_list);
64 QLIST_INIT(&s->active_list);
65 for (i = 0; i < (MAX_REQ - 1); i++) {
66 QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
69 s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
71 fse = get_fsdev_fsentry(conf->fsdev_id);
74 /* We don't have a fsdev identified by fsdev_id */
75 fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
76 "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
81 /* we haven't specified a mount_tag */
82 fprintf(stderr, "fsdev with id %s needs mount_tag arguments\n",
87 s->ctx.export_flags = fse->export_flags;
89 s->ctx.fs_root = g_strdup(fse->path);
91 s->ctx.fs_root = NULL;
93 s->ctx.exops.get_st_gen = NULL;
95 if (fse->export_flags & V9FS_SM_PASSTHROUGH) {
96 s->ctx.xops = passthrough_xattr_ops;
97 } else if (fse->export_flags & V9FS_SM_MAPPED) {
98 s->ctx.xops = mapped_xattr_ops;
99 } else if (fse->export_flags & V9FS_SM_NONE) {
100 s->ctx.xops = none_xattr_ops;
103 len = strlen(conf->tag);
104 if (len > MAX_TAG_LEN - 1) {
105 fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "
106 "maximum (%d bytes)", conf->tag, len, MAX_TAG_LEN - 1);
110 s->tag = strdup(conf->tag);
114 s->vdev.get_features = virtio_9p_get_features;
115 s->config_size = sizeof(struct virtio_9p_config) + len;
116 s->vdev.get_config = virtio_9p_get_config;
118 qemu_co_rwlock_init(&s->rename_lock);
120 if (s->ops->init(&s->ctx) < 0) {
121 fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s"
122 " and export path:%s\n", conf->fsdev_id, s->ctx.fs_root);
125 if (v9fs_init_worker_threads() < 0) {
126 fprintf(stderr, "worker thread initialization failed\n");
131 * Check details of export path, We need to use fs driver
132 * call back to do that. Since we are in the init path, we don't
133 * use co-routines here.
135 v9fs_path_init(&path);
136 if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
138 "error in converting name to path %s", strerror(errno));
141 if (s->ops->lstat(&s->ctx, &path, &stat)) {
142 fprintf(stderr, "share path %s does not exist\n", fse->path);
144 } else if (!S_ISDIR(stat.st_mode)) {
145 fprintf(stderr, "share path %s is not a directory\n", fse->path);
148 v9fs_path_free(&path);
153 static int virtio_9p_init_pci(PCIDevice *pci_dev)
155 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
158 vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
159 vdev->nvectors = proxy->nvectors;
160 virtio_init_pci(proxy, vdev);
161 /* make the actual value visible */
162 proxy->nvectors = vdev->nvectors;
166 static PCIDeviceInfo virtio_9p_info = {
167 .qdev.name = "virtio-9p-pci",
168 .qdev.size = sizeof(VirtIOPCIProxy),
169 .init = virtio_9p_init_pci,
170 .vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET,
172 .revision = VIRTIO_PCI_ABI_VERSION,
174 .qdev.props = (Property[]) {
175 DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
176 VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
177 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
178 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
179 DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
180 DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
181 DEFINE_PROP_END_OF_LIST(),
183 .qdev.reset = virtio_pci_reset,
186 static void virtio_9p_register_devices(void)
188 pci_qdev_register(&virtio_9p_info);
189 virtio_9p_set_fd_limit();
192 device_init(virtio_9p_register_devices)