/*
* Called from CUSE IOCTL: VHOST_SET_VRING_KICK
* The virtio device sends an eventfd that it can use to notify us.
* This fd gets copied into our process space.
*/
static int
set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file)
{
struct virtio_net *dev;
struct eventfd_copy eventfd_call;
struct vhost_virtqueue *vq;
dev = get_device(ctx);
if (dev == NULL)
return -1;
/* file->index refers to the queue index. The txq is 1, rxq is 0. */
vq = dev->virtqueue[file->index];
if (vq->callfd)
close((int)vq->callfd);
/* Populate the eventfd_copy structure and call eventfd_copy. */
vq->callfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
eventfd_call.source_fd = vq->callfd;
eventfd_call.target_fd = file->fd;
eventfd_call.target_pid = ctx.pid;
if (eventfd_copy(dev, &eventfd_call))
return -1;
return 0;
}
/*
* Function to get the tap device name from the provided file descriptor and
* save it in the device structure.
*/
static int
get_ifname(struct virtio_net *dev, int tap_fd, int pid)
{
struct eventfd_copy fd_tap;
struct ifreq ifr;
uint32_t size, ifr_size;
int ret;
fd_tap.source_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC);
fd_tap.target_fd = tap_fd;
fd_tap.target_pid = pid;
if (eventfd_copy(dev, &fd_tap))
return -1;
ret = ioctl(fd_tap.source_fd, TUNGETIFF, &ifr);
if (close(fd_tap.source_fd) < 0)
RTE_LOG(ERR, VHOST_CONFIG,
"(%"PRIu64") fd close failed\n",
dev->device_fh);
if (ret >= 0) {
ifr_size = strnlen(ifr.ifr_name, sizeof(ifr.ifr_name));
size = ifr_size > sizeof(dev->ifname) ?
sizeof(dev->ifname) : ifr_size;
strncpy(dev->ifname, ifr.ifr_name, size);
} else
RTE_LOG(ERR, VHOST_CONFIG,
"(%"PRIu64") TUNGETIFF ioctl failed\n",
dev->device_fh);
return 0;
}
/*
* The IOCTLs are handled using CUSE/FUSE in userspace. Depending on the type
* of IOCTL a buffer is requested to read or to write. This request is handled
* by FUSE and the buffer is then given to CUSE.
*/
static void
vhost_net_ioctl(fuse_req_t req, int cmd, void *arg,
struct fuse_file_info *fi, __rte_unused unsigned flags,
const void *in_buf, size_t in_bufsz, size_t out_bufsz)
{
struct vhost_device_ctx ctx = fuse_req_to_vhost_ctx(req, fi);
struct vhost_vring_file file;
struct vhost_vring_state state;
struct vhost_vring_addr addr;
uint64_t features;
uint32_t index;
int result = 0;
switch (cmd) {
case VHOST_NET_SET_BACKEND:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_NET_SET_BACKEND\n", ctx.fh);
if (!in_buf) {
VHOST_IOCTL_RETRY(sizeof(file), 0);
break;
}
file = *(const struct vhost_vring_file *)in_buf;
result = cuse_set_backend(ctx, &file);
fuse_reply_ioctl(req, result, NULL, 0);
break;
case VHOST_GET_FEATURES:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_GET_FEATURES\n", ctx.fh);
VHOST_IOCTL_W(uint64_t, features, vhost_get_features);
break;
case VHOST_SET_FEATURES:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_FEATURES\n", ctx.fh);
VHOST_IOCTL_R(uint64_t, features, vhost_set_features);
break;
case VHOST_RESET_OWNER:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_RESET_OWNER\n", ctx.fh);
VHOST_IOCTL(vhost_reset_owner);
break;
case VHOST_SET_OWNER:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_OWNER\n", ctx.fh);
VHOST_IOCTL(vhost_set_owner);
break;
case VHOST_SET_MEM_TABLE:
/*TODO fix race condition.*/
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_MEM_TABLE\n", ctx.fh);
static struct vhost_memory mem_temp;
switch (in_bufsz) {
case 0:
VHOST_IOCTL_RETRY(sizeof(struct vhost_memory), 0);
break;
case sizeof(struct vhost_memory):
mem_temp = *(const struct vhost_memory *) in_buf;
if (mem_temp.nregions > 0) {
VHOST_IOCTL_RETRY(sizeof(struct vhost_memory) +
(sizeof(struct vhost_memory_region) *
mem_temp.nregions), 0);
} else {
result = -1;
fuse_reply_ioctl(req, result, NULL, 0);
}
break;
default:
result = cuse_set_mem_table(ctx, in_buf,
mem_temp.nregions);
if (result)
fuse_reply_err(req, EINVAL);
else
fuse_reply_ioctl(req, result, NULL, 0);
}
break;
case VHOST_SET_VRING_NUM:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_VRING_NUM\n", ctx.fh);
VHOST_IOCTL_R(struct vhost_vring_state, state,
vhost_set_vring_num);
break;
case VHOST_SET_VRING_BASE:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_VRING_BASE\n", ctx.fh);
VHOST_IOCTL_R(struct vhost_vring_state, state,
vhost_set_vring_base);
break;
case VHOST_GET_VRING_BASE:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_GET_VRING_BASE\n", ctx.fh);
VHOST_IOCTL_RW(uint32_t, index,
struct vhost_vring_state, state, vhost_get_vring_base);
break;
case VHOST_SET_VRING_ADDR:
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_VRING_ADDR\n", ctx.fh);
VHOST_IOCTL_R(struct vhost_vring_addr, addr,
vhost_set_vring_addr);
break;
case VHOST_SET_VRING_KICK:
case VHOST_SET_VRING_CALL:
if (cmd == VHOST_SET_VRING_KICK)
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_VRING_KICK\n",
ctx.fh);
else
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: VHOST_SET_VRING_CALL\n",
ctx.fh);
if (!in_buf)
VHOST_IOCTL_RETRY(sizeof(struct vhost_vring_file), 0);
else {
int fd;
file = *(const struct vhost_vring_file *)in_buf;
LOG_DEBUG(VHOST_CONFIG,
"idx:%d fd:%d\n", file.index, file.fd);
fd = eventfd_copy(file.fd, ctx.pid);
if (fd < 0) {
fuse_reply_ioctl(req, -1, NULL, 0);
result = -1;
break;
}
file.fd = fd;
if (cmd == VHOST_SET_VRING_KICK) {
result = vhost_set_vring_kick(ctx, &file);
fuse_reply_ioctl(req, result, NULL, 0);
} else {
result = vhost_set_vring_call(ctx, &file);
fuse_reply_ioctl(req, result, NULL, 0);
}
}
break;
default:
RTE_LOG(ERR, VHOST_CONFIG,
"(%"PRIu64") IOCTL: DOESN NOT EXIST\n", ctx.fh);
result = -1;
fuse_reply_ioctl(req, result, NULL, 0);
}
if (result < 0)
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: FAIL\n", ctx.fh);
else
LOG_DEBUG(VHOST_CONFIG,
"(%"PRIu64") IOCTL: SUCCESS\n", ctx.fh);
}
