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.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)
36 struct virtio_9p_config *cfg;
37 V9fsState *s = to_virtio_9p(vdev);
39 cfg = g_malloc0(sizeof(struct virtio_9p_config) +
41 stw_raw(&cfg->tag_len, s->tag_len);
42 memcpy(cfg->tag, s->tag, s->tag_len);
43 memcpy(config, cfg, s->config_size);
47 VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
54 s = (V9fsState *)virtio_common_init("virtio-9p",
56 sizeof(struct virtio_9p_config)+
59 /* initialize pdu allocator */
60 QLIST_INIT(&s->free_list);
61 for (i = 0; i < (MAX_REQ - 1); i++) {
62 QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
65 s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
67 fse = get_fsdev_fsentry(conf->fsdev_id);
70 /* We don't have a fsdev identified by fsdev_id */
71 fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
72 "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
76 if (!fse->path || !conf->tag) {
77 /* we haven't specified a mount_tag or the path */
78 fprintf(stderr, "fsdev with id %s needs path "
79 "and Virtio-9p device needs mount_tag arguments\n",
84 if (!strcmp(fse->security_model, "passthrough")) {
85 /* Files on the Fileserver set to client user credentials */
86 s->ctx.fs_sm = SM_PASSTHROUGH;
87 s->ctx.xops = passthrough_xattr_ops;
88 } else if (!strcmp(fse->security_model, "mapped")) {
89 /* Files on the fileserver are set to QEMU credentials.
90 * Client user credentials are saved in extended attributes.
92 s->ctx.fs_sm = SM_MAPPED;
93 s->ctx.xops = mapped_xattr_ops;
94 } else if (!strcmp(fse->security_model, "none")) {
96 * Files on the fileserver are set to QEMU credentials.
98 s->ctx.fs_sm = SM_NONE;
99 s->ctx.xops = none_xattr_ops;
101 fprintf(stderr, "Default to security_model=none. You may want"
102 " enable advanced security model using "
103 "security option:\n\t security_model=passthrough\n\t "
104 "security_model=mapped\n");
105 s->ctx.fs_sm = SM_NONE;
106 s->ctx.xops = none_xattr_ops;
109 if (lstat(fse->path, &stat)) {
110 fprintf(stderr, "share path %s does not exist\n", fse->path);
112 } else if (!S_ISDIR(stat.st_mode)) {
113 fprintf(stderr, "share path %s is not a directory\n", fse->path);
117 s->ctx.fs_root = g_strdup(fse->path);
118 len = strlen(conf->tag);
119 if (len > MAX_TAG_LEN) {
122 /* s->tag is non-NULL terminated string */
123 s->tag = g_malloc(len);
124 memcpy(s->tag, conf->tag, len);
129 s->vdev.get_features = virtio_9p_get_features;
130 s->config_size = sizeof(struct virtio_9p_config) +
132 s->vdev.get_config = virtio_9p_get_config;
135 if (v9fs_init_worker_threads() < 0) {
136 fprintf(stderr, "worker thread initialization failed\n");
142 static int virtio_9p_init_pci(PCIDevice *pci_dev)
144 VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
147 vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
148 vdev->nvectors = proxy->nvectors;
149 virtio_init_pci(proxy, vdev);
150 /* make the actual value visible */
151 proxy->nvectors = vdev->nvectors;
155 static PCIDeviceInfo virtio_9p_info = {
156 .qdev.name = "virtio-9p-pci",
157 .qdev.size = sizeof(VirtIOPCIProxy),
158 .init = virtio_9p_init_pci,
159 .vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET,
161 .revision = VIRTIO_PCI_ABI_VERSION,
163 .qdev.props = (Property[]) {
164 DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
165 DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
166 DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
167 DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
168 DEFINE_PROP_END_OF_LIST(),
172 static void virtio_9p_register_devices(void)
174 pci_qdev_register(&virtio_9p_info);
175 virtio_9p_set_fd_limit();
178 device_init(virtio_9p_register_devices)