From aac8f89dba870bb263d05bb84c3d64e0204be092 Mon Sep 17 00:00:00 2001 From: Akihiko Odaki Date: Thu, 23 Feb 2023 19:20:07 +0900 Subject: [PATCH] hw/net/net_rx_pkt: Remove net_rx_pkt_has_virt_hdr When virtio-net header is not set, net_rx_pkt_get_vhdr() returns zero-filled virtio_net_hdr, which is actually valid. In fact, tap device uses zero-filled virtio_net_hdr when virtio-net header is not provided by the peer. Therefore, we can just remove net_rx_pkt_has_virt_hdr() and always assume NetTxPkt has a valid virtio-net header. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang --- hw/net/e1000e_core.c | 16 ++++------------ hw/net/net_rx_pkt.c | 11 +---------- hw/net/net_rx_pkt.h | 12 +----------- hw/net/trace-events | 1 - hw/net/virtio-net.c | 2 +- hw/net/vmxnet3.c | 12 ++---------- 6 files changed, 9 insertions(+), 45 deletions(-) diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c index 954a007151..95245c42f5 100644 --- a/hw/net/e1000e_core.c +++ b/hw/net/e1000e_core.c @@ -1240,12 +1240,6 @@ e1000e_build_rx_metadata(E1000ECore *core, goto func_exit; } - if (!net_rx_pkt_has_virt_hdr(pkt)) { - trace_e1000e_rx_metadata_no_virthdr(); - e1000e_verify_csum_in_sw(core, pkt, status_flags, istcp, isudp); - goto func_exit; - } - vhdr = net_rx_pkt_get_vhdr(pkt); if (!(vhdr->flags & VIRTIO_NET_HDR_F_DATA_VALID) && @@ -1671,12 +1665,10 @@ e1000e_write_packet_to_guest(E1000ECore *core, struct NetRxPkt *pkt, static inline void e1000e_rx_fix_l4_csum(E1000ECore *core, struct NetRxPkt *pkt) { - if (net_rx_pkt_has_virt_hdr(pkt)) { - struct virtio_net_hdr *vhdr = net_rx_pkt_get_vhdr(pkt); + struct virtio_net_hdr *vhdr = net_rx_pkt_get_vhdr(pkt); - if (vhdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { - net_rx_pkt_fix_l4_csum(pkt); - } + if (vhdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { + net_rx_pkt_fix_l4_csum(pkt); } } @@ -3379,7 +3371,7 @@ e1000e_core_pci_realize(E1000ECore *core, net_tx_pkt_init(&core->tx[i].tx_pkt, core->owner, E1000E_MAX_TX_FRAGS); } - net_rx_pkt_init(&core->rx_pkt, core->has_vnet); + net_rx_pkt_init(&core->rx_pkt); e1000x_core_prepare_eeprom(core->eeprom, eeprom_templ, diff --git a/hw/net/net_rx_pkt.c b/hw/net/net_rx_pkt.c index 1e1c504e42..b309c2f476 100644 --- a/hw/net/net_rx_pkt.c +++ b/hw/net/net_rx_pkt.c @@ -30,7 +30,6 @@ struct NetRxPkt { uint32_t tot_len; uint16_t tci; size_t ehdr_buf_len; - bool has_virt_hdr; eth_pkt_types_e packet_type; /* Analysis results */ @@ -48,10 +47,9 @@ struct NetRxPkt { eth_l4_hdr_info l4hdr_info; }; -void net_rx_pkt_init(struct NetRxPkt **pkt, bool has_virt_hdr) +void net_rx_pkt_init(struct NetRxPkt **pkt) { struct NetRxPkt *p = g_malloc0(sizeof *p); - p->has_virt_hdr = has_virt_hdr; p->vec = NULL; p->vec_len_total = 0; *pkt = p; @@ -472,13 +470,6 @@ bool net_rx_pkt_is_vlan_stripped(struct NetRxPkt *pkt) return pkt->ehdr_buf_len ? true : false; } -bool net_rx_pkt_has_virt_hdr(struct NetRxPkt *pkt) -{ - assert(pkt); - - return pkt->has_virt_hdr; -} - uint16_t net_rx_pkt_get_vlan_tag(struct NetRxPkt *pkt) { assert(pkt); diff --git a/hw/net/net_rx_pkt.h b/hw/net/net_rx_pkt.h index 048e3461f0..7277907a22 100644 --- a/hw/net/net_rx_pkt.h +++ b/hw/net/net_rx_pkt.h @@ -37,10 +37,9 @@ void net_rx_pkt_uninit(struct NetRxPkt *pkt); * Init function for rx packet functionality * * @pkt: packet pointer - * @has_virt_hdr: device uses virtio header * */ -void net_rx_pkt_init(struct NetRxPkt **pkt, bool has_virt_hdr); +void net_rx_pkt_init(struct NetRxPkt **pkt); /** * returns total length of data attached to rx context @@ -215,15 +214,6 @@ uint16_t net_rx_pkt_get_vlan_tag(struct NetRxPkt *pkt); bool net_rx_pkt_is_vlan_stripped(struct NetRxPkt *pkt); /** - * notifies caller if the packet has virtio header - * - * @pkt: packet - * @ret: true if packet has virtio header, false otherwize - * - */ -bool net_rx_pkt_has_virt_hdr(struct NetRxPkt *pkt); - -/** * attach scatter-gather data to rx packet * * @pkt: packet diff --git a/hw/net/trace-events b/hw/net/trace-events index c98ad12537..f7257a0693 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -188,7 +188,6 @@ e1000e_rx_metadata_rss(uint32_t rss, uint32_t mrq) "RSS data: rss: 0x%X, mrq: 0x e1000e_rx_metadata_ip_id(uint16_t ip_id) "the IPv4 ID is 0x%X" e1000e_rx_metadata_ack(void) "the packet is TCP ACK" e1000e_rx_metadata_pkt_type(uint32_t pkt_type) "the packet type is %u" -e1000e_rx_metadata_no_virthdr(void) "the packet has no virt-header" e1000e_rx_metadata_virthdr_no_csum_info(void) "virt-header does not contain checksum info" e1000e_rx_metadata_l3_cso_disabled(void) "IP4 CSO is disabled" e1000e_rx_metadata_l4_cso_disabled(void) "TCP/UDP CSO is disabled" diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 09d5c7a664..dda7da26b4 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -3718,7 +3718,7 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp) QTAILQ_INIT(&n->rsc_chains); n->qdev = dev; - net_rx_pkt_init(&n->rx_pkt, false); + net_rx_pkt_init(&n->rx_pkt); if (virtio_has_feature(n->host_features, VIRTIO_NET_F_RSS)) { virtio_net_load_ebpf(n); diff --git a/hw/net/vmxnet3.c b/hw/net/vmxnet3.c index eab8fa4d0b..6c6bb2ac37 100644 --- a/hw/net/vmxnet3.c +++ b/hw/net/vmxnet3.c @@ -851,10 +851,6 @@ static void vmxnet3_rx_need_csum_calculate(struct NetRxPkt *pkt, uint8_t *data; int len; - if (!net_rx_pkt_has_virt_hdr(pkt)) { - return; - } - vhdr = net_rx_pkt_get_vhdr(pkt); if (!VMXNET_FLAG_IS_SET(vhdr->flags, VIRTIO_NET_HDR_F_NEEDS_CSUM)) { return; @@ -898,10 +894,6 @@ static void vmxnet3_rx_update_descr(struct NetRxPkt *pkt, rxcd->tci = net_rx_pkt_get_vlan_tag(pkt); } - if (!net_rx_pkt_has_virt_hdr(pkt)) { - goto nocsum; - } - vhdr = net_rx_pkt_get_vhdr(pkt); /* * Checksum is valid when lower level tell so or when lower level @@ -1522,7 +1514,7 @@ static void vmxnet3_activate_device(VMXNET3State *s) /* Preallocate TX packet wrapper */ VMW_CFPRN("Max TX fragments is %u", s->max_tx_frags); net_tx_pkt_init(&s->tx_pkt, PCI_DEVICE(s), s->max_tx_frags); - net_rx_pkt_init(&s->rx_pkt, s->peer_has_vhdr); + net_rx_pkt_init(&s->rx_pkt); /* Read rings memory locations for RX queues */ for (i = 0; i < s->rxq_num; i++) { @@ -2402,7 +2394,7 @@ static int vmxnet3_post_load(void *opaque, int version_id) VMXNET3State *s = opaque; net_tx_pkt_init(&s->tx_pkt, PCI_DEVICE(s), s->max_tx_frags); - net_rx_pkt_init(&s->rx_pkt, s->peer_has_vhdr); + net_rx_pkt_init(&s->rx_pkt); if (s->msix_used) { vmxnet3_use_msix_vectors(s, VMXNET3_MAX_INTRS); -- 2.11.4.GIT