diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index a3c711b56d..403a693baf 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -42,6 +42,7 @@ #include "sysemu/sysemu.h" #include "trace.h" #include "monitor/qdev.h" +#include "monitor/monitor.h" #include "hw/pci/pci_device.h" #include "net_rx_pkt.h" #include "hw/virtio/vhost.h" @@ -1328,14 +1329,53 @@ static void virtio_net_detach_epbf_rss(VirtIONet *n) virtio_net_attach_ebpf_to_backend(n->nic, -1); } -static bool virtio_net_load_ebpf(VirtIONet *n) +static bool virtio_net_load_ebpf_fds(VirtIONet *n, Error **errp) { - if (!virtio_net_attach_ebpf_to_backend(n->nic, -1)) { - /* backend doesn't support steering ebpf */ - return false; + int fds[EBPF_RSS_MAX_FDS] = { [0 ... EBPF_RSS_MAX_FDS - 1] = -1}; + int ret = true; + int i = 0; + + ERRP_GUARD(); + + if (n->nr_ebpf_rss_fds != EBPF_RSS_MAX_FDS) { + error_setg(errp, + "Expected %d file descriptors but got %d", + EBPF_RSS_MAX_FDS, n->nr_ebpf_rss_fds); + return false; + } + + for (i = 0; i < n->nr_ebpf_rss_fds; i++) { + fds[i] = monitor_fd_param(monitor_cur(), n->ebpf_rss_fds[i], errp); + if (*errp) { + ret = false; + goto exit; + } } - return ebpf_rss_load(&n->ebpf_rss); + ret = ebpf_rss_load_fds(&n->ebpf_rss, fds[0], fds[1], fds[2], fds[3]); + +exit: + if (!ret || *errp) { + for (i = 0; i < n->nr_ebpf_rss_fds && fds[i] != -1; i++) { + close(fds[i]); + } + } + + return ret; +} + +static bool virtio_net_load_ebpf(VirtIONet *n, Error **errp) +{ + bool ret = false; + + if (virtio_net_attach_ebpf_to_backend(n->nic, -1)) { + if (!(n->ebpf_rss_fds + && virtio_net_load_ebpf_fds(n, errp))) { + ret = ebpf_rss_load(&n->ebpf_rss); + } + } + + return ret; } static void virtio_net_unload_ebpf(VirtIONet *n) @@ -3768,7 +3808,7 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp) net_rx_pkt_init(&n->rx_pkt); if (virtio_has_feature(n->host_features, VIRTIO_NET_F_RSS)) { - virtio_net_load_ebpf(n); + virtio_net_load_ebpf(n, errp); } } @@ -3930,6 +3970,8 @@ static Property virtio_net_properties[] = { VIRTIO_NET_F_RSS, false), DEFINE_PROP_BIT64("hash", VirtIONet, host_features, VIRTIO_NET_F_HASH_REPORT, false), + DEFINE_PROP_ARRAY("ebpf-rss-fds", VirtIONet, nr_ebpf_rss_fds, + ebpf_rss_fds, qdev_prop_string, char*), DEFINE_PROP_BIT64("guest_rsc_ext", VirtIONet, host_features, VIRTIO_NET_F_RSC_EXT, false), DEFINE_PROP_UINT32("rsc_interval", VirtIONet, rsc_timeout, diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h index eaee8f4243..060c23c04d 100644 --- a/include/hw/virtio/virtio-net.h +++ b/include/hw/virtio/virtio-net.h @@ -225,6 +225,8 @@ struct VirtIONet { VirtioNetRssData rss_data; struct NetRxPkt *rx_pkt; struct EBPFRSSContext ebpf_rss; + uint32_t nr_ebpf_rss_fds; + char **ebpf_rss_fds; }; size_t virtio_net_handle_ctrl_iov(VirtIODevice *vdev,