2011-06-01 09:05:13 +02:00
|
|
|
/*
|
|
|
|
* Virtio 9p backend
|
|
|
|
*
|
|
|
|
* Copyright IBM, Corp. 2010
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
|
|
*
|
|
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
|
|
* the COPYING file in the top-level directory.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
2011-06-01 09:05:14 +02:00
|
|
|
#include "hw/virtio.h"
|
|
|
|
#include "hw/pc.h"
|
2011-06-01 09:05:13 +02:00
|
|
|
#include "qemu_socket.h"
|
2011-06-01 09:05:14 +02:00
|
|
|
#include "hw/virtio-pci.h"
|
2011-06-01 09:05:13 +02:00
|
|
|
#include "virtio-9p.h"
|
|
|
|
#include "fsdev/qemu-fsdev.h"
|
|
|
|
#include "virtio-9p-xattr.h"
|
|
|
|
|
|
|
|
static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features)
|
|
|
|
{
|
|
|
|
features |= 1 << VIRTIO_9P_MOUNT_TAG;
|
|
|
|
return features;
|
|
|
|
}
|
|
|
|
|
|
|
|
static V9fsState *to_virtio_9p(VirtIODevice *vdev)
|
|
|
|
{
|
|
|
|
return (V9fsState *)vdev;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
|
|
|
|
{
|
|
|
|
struct virtio_9p_config *cfg;
|
|
|
|
V9fsState *s = to_virtio_9p(vdev);
|
|
|
|
|
|
|
|
cfg = qemu_mallocz(sizeof(struct virtio_9p_config) +
|
|
|
|
s->tag_len);
|
|
|
|
stw_raw(&cfg->tag_len, s->tag_len);
|
|
|
|
memcpy(cfg->tag, s->tag, s->tag_len);
|
|
|
|
memcpy(config, cfg, s->config_size);
|
|
|
|
qemu_free(cfg);
|
|
|
|
}
|
|
|
|
|
|
|
|
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
|
|
|
|
{
|
|
|
|
V9fsState *s;
|
|
|
|
int i, len;
|
|
|
|
struct stat stat;
|
|
|
|
FsTypeEntry *fse;
|
|
|
|
|
|
|
|
|
|
|
|
s = (V9fsState *)virtio_common_init("virtio-9p",
|
|
|
|
VIRTIO_ID_9P,
|
|
|
|
sizeof(struct virtio_9p_config)+
|
|
|
|
MAX_TAG_LEN,
|
|
|
|
sizeof(V9fsState));
|
|
|
|
|
|
|
|
/* initialize pdu allocator */
|
|
|
|
QLIST_INIT(&s->free_list);
|
|
|
|
for (i = 0; i < (MAX_REQ - 1); i++) {
|
|
|
|
QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
|
|
|
|
}
|
|
|
|
|
|
|
|
s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);
|
|
|
|
|
|
|
|
fse = get_fsdev_fsentry(conf->fsdev_id);
|
|
|
|
|
|
|
|
if (!fse) {
|
|
|
|
/* We don't have a fsdev identified by fsdev_id */
|
|
|
|
fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
|
|
|
|
"id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!fse->path || !conf->tag) {
|
|
|
|
/* we haven't specified a mount_tag or the path */
|
|
|
|
fprintf(stderr, "fsdev with id %s needs path "
|
|
|
|
"and Virtio-9p device needs mount_tag arguments\n",
|
|
|
|
conf->fsdev_id);
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!strcmp(fse->security_model, "passthrough")) {
|
|
|
|
/* Files on the Fileserver set to client user credentials */
|
|
|
|
s->ctx.fs_sm = SM_PASSTHROUGH;
|
|
|
|
s->ctx.xops = passthrough_xattr_ops;
|
|
|
|
} else if (!strcmp(fse->security_model, "mapped")) {
|
|
|
|
/* Files on the fileserver are set to QEMU credentials.
|
|
|
|
* Client user credentials are saved in extended attributes.
|
|
|
|
*/
|
|
|
|
s->ctx.fs_sm = SM_MAPPED;
|
|
|
|
s->ctx.xops = mapped_xattr_ops;
|
|
|
|
} else if (!strcmp(fse->security_model, "none")) {
|
|
|
|
/*
|
|
|
|
* Files on the fileserver are set to QEMU credentials.
|
|
|
|
*/
|
|
|
|
s->ctx.fs_sm = SM_NONE;
|
|
|
|
s->ctx.xops = none_xattr_ops;
|
|
|
|
} else {
|
|
|
|
fprintf(stderr, "Default to security_model=none. You may want"
|
|
|
|
" enable advanced security model using "
|
|
|
|
"security option:\n\t security_model=passthrough\n\t "
|
|
|
|
"security_model=mapped\n");
|
|
|
|
s->ctx.fs_sm = SM_NONE;
|
|
|
|
s->ctx.xops = none_xattr_ops;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (lstat(fse->path, &stat)) {
|
|
|
|
fprintf(stderr, "share path %s does not exist\n", fse->path);
|
|
|
|
exit(1);
|
|
|
|
} else if (!S_ISDIR(stat.st_mode)) {
|
|
|
|
fprintf(stderr, "share path %s is not a directory\n", fse->path);
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
s->ctx.fs_root = qemu_strdup(fse->path);
|
|
|
|
len = strlen(conf->tag);
|
|
|
|
if (len > MAX_TAG_LEN) {
|
|
|
|
len = MAX_TAG_LEN;
|
|
|
|
}
|
|
|
|
/* s->tag is non-NULL terminated string */
|
|
|
|
s->tag = qemu_malloc(len);
|
|
|
|
memcpy(s->tag, conf->tag, len);
|
|
|
|
s->tag_len = len;
|
|
|
|
s->ctx.uid = -1;
|
|
|
|
|
|
|
|
s->ops = fse->ops;
|
|
|
|
s->vdev.get_features = virtio_9p_get_features;
|
|
|
|
s->config_size = sizeof(struct virtio_9p_config) +
|
|
|
|
s->tag_len;
|
|
|
|
s->vdev.get_config = virtio_9p_get_config;
|
|
|
|
|
|
|
|
return &s->vdev;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int virtio_9p_init_pci(PCIDevice *pci_dev)
|
|
|
|
{
|
|
|
|
VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
|
|
|
|
VirtIODevice *vdev;
|
|
|
|
|
|
|
|
vdev = virtio_9p_init(&pci_dev->qdev, &proxy->fsconf);
|
|
|
|
vdev->nvectors = proxy->nvectors;
|
2011-06-14 16:51:11 +02:00
|
|
|
virtio_init_pci(proxy, vdev);
|
2011-06-01 09:05:13 +02:00
|
|
|
/* make the actual value visible */
|
|
|
|
proxy->nvectors = vdev->nvectors;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static PCIDeviceInfo virtio_9p_info = {
|
|
|
|
.qdev.name = "virtio-9p-pci",
|
|
|
|
.qdev.size = sizeof(VirtIOPCIProxy),
|
|
|
|
.init = virtio_9p_init_pci,
|
2011-06-14 16:51:11 +02:00
|
|
|
.vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET,
|
|
|
|
.device_id = 0x1009,
|
|
|
|
.revision = VIRTIO_PCI_ABI_VERSION,
|
|
|
|
.class_id = 0x2,
|
2011-06-01 09:05:13 +02:00
|
|
|
.qdev.props = (Property[]) {
|
|
|
|
DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors, 2),
|
|
|
|
DEFINE_VIRTIO_COMMON_FEATURES(VirtIOPCIProxy, host_features),
|
|
|
|
DEFINE_PROP_STRING("mount_tag", VirtIOPCIProxy, fsconf.tag),
|
|
|
|
DEFINE_PROP_STRING("fsdev", VirtIOPCIProxy, fsconf.fsdev_id),
|
|
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
static void virtio_9p_register_devices(void)
|
|
|
|
{
|
|
|
|
pci_qdev_register(&virtio_9p_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
device_init(virtio_9p_register_devices)
|