@@ -1093,6 +1093,18 @@ AC_DEFUN([OVS_CHECK_IF_DL],
AC_SEARCH_LIBS([pcap_open_live], [pcap])
fi])
+dnl OVS_CHECK_LINUX_TPACKET
+dnl
+dnl Configure Linux TPACKET.
+AC_DEFUN([OVS_CHECK_LINUX_TPACKET], [
+ AC_COMPILE_IFELSE([
+ AC_LANG_PROGRAM([#include <linux/if_packet.h>], [
+ struct tpacket3_hdr x = { 0 };
+ ])],
+ [AC_DEFINE([HAVE_TPACKET_V3], [1],
+ [Define to 1 if struct tpacket3_hdr is available.])])
+])
+
dnl Checks for buggy strtok_r.
dnl
dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
@@ -89,6 +89,7 @@ OVS_CHECK_VISUAL_STUDIO_DDK
OVS_CHECK_COVERAGE
OVS_CHECK_NDEBUG
OVS_CHECK_NETLINK
+OVS_CHECK_LINUX_TPACKET
OVS_CHECK_OPENSSL
OVS_CHECK_LIBCAPNG
OVS_CHECK_LOGDIR
@@ -1,4 +1,5 @@
noinst_HEADERS += \
+ include/linux/if_packet.h \
include/linux/netlink.h \
include/linux/netfilter/nf_conntrack_sctp.h \
include/linux/pkt_cls.h \
new file mode 100644
@@ -0,0 +1,128 @@
+#ifndef __LINUX_IF_PACKET_WRAPPER_H
+#define __LINUX_IF_PACKET_WRAPPER_H 1
+
+#ifdef HAVE_TPACKET_V3
+#include_next <linux/if_packet.h>
+#else
+#define HAVE_TPACKET_V3 1
+
+struct sockaddr_pkt {
+ unsigned short spkt_family;
+ unsigned char spkt_device[14];
+ uint16_t spkt_protocol;
+};
+
+struct sockaddr_ll {
+ unsigned short sll_family;
+ uint16_t sll_protocol;
+ int sll_ifindex;
+ unsigned short sll_hatype;
+ unsigned char sll_pkttype;
+ unsigned char sll_halen;
+ unsigned char sll_addr[8];
+};
+
+/* Packet types */
+#define PACKET_HOST 0 /* To us */
+#define PACKET_OTHERHOST 3 /* To someone else */
+#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
+
+/* Packet socket options */
+#define PACKET_RX_RING 5
+#define PACKET_VERSION 10
+#define PACKET_TX_RING 13
+#define PACKET_VNET_HDR 15
+
+/* Rx ring - header status */
+#define TP_STATUS_KERNEL 0
+#define TP_STATUS_USER (1 << 0)
+#define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
+#define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
+
+/* Tx ring - header status */
+#define TP_STATUS_SEND_REQUEST (1 << 0)
+#define TP_STATUS_SENDING (1 << 1)
+
+struct tpacket_hdr {
+ unsigned long tp_status;
+ unsigned int tp_len;
+ unsigned int tp_snaplen;
+ unsigned short tp_mac;
+ unsigned short tp_net;
+ unsigned int tp_sec;
+ unsigned int tp_usec;
+};
+
+#define TPACKET_ALIGNMENT 16
+#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
+
+struct tpacket_hdr_variant1 {
+ uint32_t tp_rxhash;
+ uint32_t tp_vlan_tci;
+ uint16_t tp_vlan_tpid;
+ uint16_t tp_padding;
+};
+
+struct tpacket3_hdr {
+ uint32_t tp_next_offset;
+ uint32_t tp_sec;
+ uint32_t tp_nsec;
+ uint32_t tp_snaplen;
+ uint32_t tp_len;
+ uint32_t tp_status;
+ uint16_t tp_mac;
+ uint16_t tp_net;
+ /* pkt_hdr variants */
+ union {
+ struct tpacket_hdr_variant1 hv1;
+ };
+ uint8_t tp_padding[8];
+};
+
+struct tpacket_bd_ts {
+ unsigned int ts_sec;
+ union {
+ unsigned int ts_usec;
+ unsigned int ts_nsec;
+ };
+};
+
+struct tpacket_hdr_v1 {
+ uint32_t block_status;
+ uint32_t num_pkts;
+ uint32_t offset_to_first_pkt;
+ uint32_t blk_len;
+ uint64_t __attribute__((aligned(8))) seq_num;
+ struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
+};
+
+union tpacket_bd_header_u {
+ struct tpacket_hdr_v1 bh1;
+};
+
+struct tpacket_block_desc {
+ uint32_t version;
+ uint32_t offset_to_priv;
+ union tpacket_bd_header_u hdr;
+};
+
+#define TPACKET3_HDRLEN \
+ (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
+
+enum tpacket_versions {
+ TPACKET_V1,
+ TPACKET_V2,
+ TPACKET_V3
+};
+
+struct tpacket_req3 {
+ unsigned int tp_block_size; /* Minimal size of contiguous block */
+ unsigned int tp_block_nr; /* Number of blocks */
+ unsigned int tp_frame_size; /* Size of frame */
+ unsigned int tp_frame_nr; /* Total number of frames */
+ unsigned int tp_retire_blk_tov; /* Timeout in msecs */
+ unsigned int tp_sizeof_priv; /* Offset to private data area */
+ unsigned int tp_feature_req_word;
+};
+#endif /* HAVE_TPACKET_V3 */
+#endif /* __LINUX_IF_PACKET_WRAPPER_H */
@@ -5,6 +5,7 @@
#error "Use this header only with sparse. It is not a correct implementation."
#endif
+#include <openvswitch/types.h>
#include_next <linux/if_packet.h>
/* Fix endianness of 'spkt_protocol' and 'sll_protocol' members. */
@@ -27,4 +28,114 @@ struct sockaddr_ll {
unsigned char sll_addr[8];
};
+/* Packet types */
+#define PACKET_HOST 0 /* To us */
+#define PACKET_OTHERHOST 3 /* To someone else */
+#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
+
+/* Packet socket options */
+#define PACKET_RX_RING 5
+#define PACKET_VERSION 10
+#define PACKET_TX_RING 13
+#define PACKET_VNET_HDR 15
+
+/* Rx ring - header status */
+#define TP_STATUS_KERNEL 0
+#define TP_STATUS_USER (1 << 0)
+#define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
+#define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
+
+/* Tx ring - header status */
+#define TP_STATUS_SEND_REQUEST (1 << 0)
+#define TP_STATUS_SENDING (1 << 1)
+
+#define tpacket_hdr rpl_tpacket_hdr
+struct tpacket_hdr {
+ unsigned long tp_status;
+ unsigned int tp_len;
+ unsigned int tp_snaplen;
+ unsigned short tp_mac;
+ unsigned short tp_net;
+ unsigned int tp_sec;
+ unsigned int tp_usec;
+};
+
+#define TPACKET_ALIGNMENT 16
+#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
+
+#define tpacket_hdr_variant1 rpl_tpacket_hdr_variant1
+struct tpacket_hdr_variant1 {
+ uint32_t tp_rxhash;
+ uint32_t tp_vlan_tci;
+ uint16_t tp_vlan_tpid;
+ uint16_t tp_padding;
+};
+
+#define tpacket3_hdr rpl_tpacket3_hdr
+struct tpacket3_hdr {
+ uint32_t tp_next_offset;
+ uint32_t tp_sec;
+ uint32_t tp_nsec;
+ uint32_t tp_snaplen;
+ uint32_t tp_len;
+ uint32_t tp_status;
+ uint16_t tp_mac;
+ uint16_t tp_net;
+ /* pkt_hdr variants */
+ union {
+ struct tpacket_hdr_variant1 hv1;
+ };
+ uint8_t tp_padding[8];
+};
+
+#define tpacket_bd_ts rpl_tpacket_bd_ts
+struct tpacket_bd_ts {
+ unsigned int ts_sec;
+ union {
+ unsigned int ts_usec;
+ unsigned int ts_nsec;
+ };
+};
+
+#define tpacket_hdr_v1 rpl_tpacket_hdr_v1
+struct tpacket_hdr_v1 {
+ uint32_t block_status;
+ uint32_t num_pkts;
+ uint32_t offset_to_first_pkt;
+ uint32_t blk_len;
+ uint64_t __attribute__((aligned(8))) seq_num;
+ struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
+};
+
+#define tpacket_bd_header_u rpl_tpacket_bd_header_u
+union tpacket_bd_header_u {
+ struct tpacket_hdr_v1 bh1;
+};
+
+#define tpacket_block_desc rpl_tpacket_block_desc
+struct tpacket_block_desc {
+ uint32_t version;
+ uint32_t offset_to_priv;
+ union tpacket_bd_header_u hdr;
+};
+
+#define TPACKET3_HDRLEN \
+ (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
+
+enum rpl_tpacket_versions {
+ TPACKET_V1,
+ TPACKET_V2,
+ TPACKET_V3
+};
+
+#define tpacket_req3 rpl_tpacket_req3
+struct tpacket_req3 {
+ unsigned int tp_block_size; /* Minimal size of contiguous block */
+ unsigned int tp_block_nr; /* Number of blocks */
+ unsigned int tp_frame_size; /* Size of frame */
+ unsigned int tp_frame_nr; /* Total number of frames */
+ unsigned int tp_retire_blk_tov; /* Timeout in msecs */
+ unsigned int tp_sizeof_priv; /* Offset to private data area */
+ unsigned int tp_feature_req_word;
+};
#endif
@@ -26,6 +26,7 @@
#include <linux/mii.h>
#include <stdint.h>
#include <stdbool.h>
+#include <linux/if_packet.h>
#include "dp-packet.h"
#include "netdev-afxdp.h"
@@ -41,6 +42,22 @@ struct netdev;
/* The maximum packet length is 16 bits */
#define LINUX_RXQ_TSO_MAX_LEN 65535
+#ifdef HAVE_TPACKET_V3
+struct tpacket_ring {
+ int sockfd;
+ struct iovec *rd;
+ uint8_t *mm_space;
+ size_t mm_len, rd_len;
+ struct sockaddr_ll ll;
+ int type, rd_num, flen;
+ struct tpacket_req3 req;
+ uint32_t block_num;
+ uint32_t frame_num;
+ uint32_t frame_num_in_block;
+ void * ppd;
+};
+#endif /* HAVE_TPACKET_V3 */
+
struct netdev_rxq_linux {
struct netdev_rxq up;
bool is_tap;
@@ -105,6 +122,11 @@ struct netdev_linux {
int numa_id; /* NUMA node id. */
+#ifdef HAVE_TPACKET_V3
+ struct tpacket_ring *tp_rx_ring;
+ struct tpacket_ring *tp_tx_ring;
+#endif
+
#ifdef HAVE_AF_XDP
/* AF_XDP information. */
struct xsk_socket_info **xsks;
@@ -48,6 +48,9 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#ifdef HAVE_TPACKET_V3
+#include <sys/mman.h>
+#endif
#include "coverage.h"
#include "dp-packet.h"
@@ -1055,6 +1058,111 @@ netdev_linux_rxq_alloc(void)
return &rx->up;
}
+#ifdef HAVE_TPACKET_V3
+static inline struct tpacket3_hdr *
+tpacket_get_next_frame(struct tpacket_ring *ring, uint32_t frame_num)
+{
+ uint8_t *f0 = ring->rd[0].iov_base;
+
+ return ALIGNED_CAST(struct tpacket3_hdr *,
+ f0 + (frame_num * ring->req.tp_frame_size));
+}
+
+/*
+ * ring->rd_num is tp_block_nr, ring->flen is tp_block_size
+ */
+static inline void
+tpacket_fill_ring(struct tpacket_ring *ring, unsigned int blocks, int type)
+{
+ if (type == PACKET_RX_RING) {
+ ring->req.tp_retire_blk_tov = 0;
+ ring->req.tp_sizeof_priv = 0;
+ ring->req.tp_feature_req_word = 0;
+ }
+
+ if (userspace_tso_enabled()) {
+ /* For TX ring, the whole packet must be in one frame
+ * so tp_frame_size must big enough to accommodate
+ * 64K packet, tpacket3_hdr will occupy some bytes,
+ * the final frame size is 64K + 4K = 68K.
+ */
+ ring->req.tp_frame_size = (getpagesize() << 4) + getpagesize();
+ ring->req.tp_block_size = ring->req.tp_frame_size;
+ } else {
+ ring->req.tp_block_size = getpagesize() << 2;
+ ring->req.tp_frame_size = TPACKET_ALIGNMENT << 7;
+ }
+
+ ring->req.tp_block_nr = blocks;
+
+ ring->req.tp_frame_nr = ring->req.tp_block_size /
+ ring->req.tp_frame_size *
+ ring->req.tp_block_nr;
+
+ ring->mm_len = ring->req.tp_block_size * ring->req.tp_block_nr;
+ ring->rd_num = ring->req.tp_block_nr;
+ ring->flen = ring->req.tp_block_size;
+}
+
+static int
+tpacket_setup_ring(int sock, struct tpacket_ring *ring, int type)
+{
+ int ret = 0;
+ unsigned int blocks;
+
+ if (userspace_tso_enabled()) {
+ blocks = 128;
+ } else {
+ blocks = 256;
+ }
+ ring->type = type;
+ tpacket_fill_ring(ring, blocks, type);
+ ret = setsockopt(sock, SOL_PACKET, type, &ring->req,
+ sizeof(ring->req));
+
+ if (ret == -1) {
+ return -1;
+ }
+
+ ring->rd_len = ring->rd_num * sizeof(*ring->rd);
+ ring->rd = xmalloc(ring->rd_len);
+ if (ring->rd == NULL) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int
+tpacket_mmap_rx_tx_ring(int sock, struct tpacket_ring *rx_ring,
+ struct tpacket_ring *tx_ring)
+{
+ int i;
+
+ rx_ring->mm_space = mmap(NULL, rx_ring->mm_len + tx_ring->mm_len,
+ PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_LOCKED | MAP_POPULATE, sock, 0);
+ if (rx_ring->mm_space == MAP_FAILED) {
+ return -1;
+ }
+
+ memset(rx_ring->rd, 0, rx_ring->rd_len);
+ for (i = 0; i < rx_ring->rd_num; ++i) {
+ rx_ring->rd[i].iov_base = rx_ring->mm_space + (i * rx_ring->flen);
+ rx_ring->rd[i].iov_len = rx_ring->flen;
+ }
+
+ tx_ring->mm_space = rx_ring->mm_space + rx_ring->mm_len;
+ memset(tx_ring->rd, 0, tx_ring->rd_len);
+ for (i = 0; i < tx_ring->rd_num; ++i) {
+ tx_ring->rd[i].iov_base = tx_ring->mm_space + (i * tx_ring->flen);
+ tx_ring->rd[i].iov_len = tx_ring->flen;
+ }
+
+ return 0;
+}
+#endif
+
static int
netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
{
@@ -1062,6 +1170,9 @@ netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
struct netdev *netdev_ = rx->up.netdev;
struct netdev_linux *netdev = netdev_linux_cast(netdev_);
int error;
+#ifdef HAVE_TPACKET_V3
+ int ver = TPACKET_V3;
+#endif
ovs_mutex_lock(&netdev->mutex);
rx->is_tap = is_tap_netdev(netdev_);
@@ -1070,6 +1181,7 @@ netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
} else {
struct sockaddr_ll sll;
int ifindex, val;
+
/* Result of tcpdump -dd inbound */
static const struct sock_filter filt[] = {
{ 0x28, 0, 0, 0xfffff004 }, /* ldh [0] */
@@ -1082,7 +1194,7 @@ netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
};
/* Create file descriptor. */
- rx->fd = socket(PF_PACKET, SOCK_RAW, 0);
+ rx->fd = socket(PF_PACKET, SOCK_RAW, (OVS_FORCE int) htons(ETH_P_ALL));
if (rx->fd < 0) {
error = errno;
VLOG_ERR("failed to create raw socket (%s)", ovs_strerror(error));
@@ -1106,6 +1218,49 @@ netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
goto error;
}
+#ifdef HAVE_TPACKET_V3
+ /* TPACKET_V3 ring setup must be after setsockopt
+ * PACKET_VNET_HDR because PACKET_VNET_HDR will return error
+ * (EBUSY) if ring is set up
+ */
+ error = setsockopt(rx->fd, SOL_PACKET, PACKET_VERSION, &ver,
+ sizeof(ver));
+ if (error != 0) {
+ error = errno;
+ VLOG_ERR("%s: failed to set tpacket version (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
+ goto error;
+ }
+ netdev->tp_rx_ring = xzalloc(sizeof(struct tpacket_ring));
+ netdev->tp_tx_ring = xzalloc(sizeof(struct tpacket_ring));
+ netdev->tp_rx_ring->sockfd = rx->fd;
+ netdev->tp_tx_ring->sockfd = rx->fd;
+ error = tpacket_setup_ring(rx->fd, netdev->tp_rx_ring,
+ PACKET_RX_RING);
+ if (error != 0) {
+ error = errno;
+ VLOG_ERR("%s: failed to set tpacket rx ring (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
+ goto error;
+ }
+ error = tpacket_setup_ring(rx->fd, netdev->tp_tx_ring,
+ PACKET_TX_RING);
+ if (error != 0) {
+ error = errno;
+ VLOG_ERR("%s: failed to set tpacket tx ring (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
+ goto error;
+ }
+ error = tpacket_mmap_rx_tx_ring(rx->fd, netdev->tp_rx_ring,
+ netdev->tp_tx_ring);
+ if (error != 0) {
+ error = errno;
+ VLOG_ERR("%s: failed to mmap tpacket rx & tx ring (%s)",
+ netdev_get_name(netdev_), ovs_strerror(error));
+ goto error;
+ }
+#endif
+
/* Set non-blocking mode. */
error = set_nonblocking(rx->fd);
if (error) {
@@ -1120,9 +1275,14 @@ netdev_linux_rxq_construct(struct netdev_rxq *rxq_)
/* Bind to specific ethernet device. */
memset(&sll, 0, sizeof sll);
- sll.sll_family = AF_PACKET;
+ sll.sll_family = PF_PACKET;
+#ifdef HAVE_TPACKET_V3
+ sll.sll_hatype = 0;
+ sll.sll_pkttype = 0;
+ sll.sll_halen = 0;
+#endif
sll.sll_ifindex = ifindex;
- sll.sll_protocol = htons(ETH_P_ALL);
+ sll.sll_protocol = (OVS_FORCE ovs_be16) htons(ETH_P_ALL);
if (bind(rx->fd, (struct sockaddr *) &sll, sizeof sll) < 0) {
error = errno;
VLOG_ERR("%s: failed to bind raw socket (%s)",
@@ -1159,6 +1319,17 @@ netdev_linux_rxq_destruct(struct netdev_rxq *rxq_)
int i;
if (!rx->is_tap) {
+#ifdef HAVE_TPACKET_V3
+ struct netdev_linux *netdev = netdev_linux_cast(rx->up.netdev);
+
+ if (netdev->tp_rx_ring) {
+ munmap(netdev->tp_rx_ring->mm_space,
+ 2 * netdev->tp_rx_ring->mm_len);
+ free(netdev->tp_rx_ring->rd);
+ free(netdev->tp_tx_ring->rd);
+ }
+#endif
+
close(rx->fd);
}
@@ -1175,6 +1346,7 @@ netdev_linux_rxq_dealloc(struct netdev_rxq *rxq_)
free(rx);
}
+#ifndef HAVE_TPACKET_V3
static ovs_be16
auxdata_to_vlan_tpid(const struct tpacket_auxdata *aux, bool double_tagged)
{
@@ -1342,6 +1514,7 @@ netdev_linux_batch_rxq_recv_sock(struct netdev_rxq_linux *rx, int mtu,
return 0;
}
+#endif /* HAVE_TPACKET_V3 */
/*
* Receive packets from tap by batch process for better performance,
@@ -1435,6 +1608,109 @@ netdev_linux_batch_rxq_recv_tap(struct netdev_rxq_linux *rx, int mtu,
return 0;
}
+#ifdef HAVE_TPACKET_V3
+static int
+netdev_linux_batch_recv_tpacket(struct netdev_rxq_linux *rx, int mtu,
+ struct dp_packet_batch *batch)
+{
+ struct netdev *netdev_ = netdev_rxq_get_netdev(&rx->up);
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct dp_packet *buffer;
+ int i = 0;
+ unsigned int block_num;
+ unsigned int fn_in_block;
+ struct tpacket_block_desc *pbd;
+ struct tpacket3_hdr *ppd;
+ int virtio_net_hdr_size;
+ size_t buffer_len;
+
+ if (userspace_tso_enabled()) {
+ virtio_net_hdr_size = sizeof(struct virtio_net_hdr);
+ } else {
+ virtio_net_hdr_size = 0;
+ }
+ buffer_len = virtio_net_hdr_size + VLAN_ETH_HEADER_LEN + mtu;
+
+ ppd = ALIGNED_CAST(struct tpacket3_hdr *, netdev->tp_rx_ring->ppd);
+ block_num = netdev->tp_rx_ring->block_num;
+ fn_in_block = netdev->tp_rx_ring->frame_num_in_block;
+ pbd = ALIGNED_CAST(struct tpacket_block_desc *,
+ netdev->tp_rx_ring->rd[block_num].iov_base);
+
+ while (i < NETDEV_MAX_BURST) {
+ if ((pbd->hdr.bh1.block_status & TP_STATUS_USER) == 0) {
+ break;
+ }
+ if (fn_in_block == 0) {
+ ppd = ALIGNED_CAST(struct tpacket3_hdr *, (uint8_t *) pbd +
+ pbd->hdr.bh1.offset_to_first_pkt);
+ }
+
+ if (ppd->tp_snaplen > (mtu + VLAN_ETH_HEADER_LEN)) {
+ buffer_len = virtio_net_hdr_size + VLAN_ETH_HEADER_LEN
+ + ppd->tp_snaplen;
+ }
+
+ buffer = dp_packet_new_with_headroom(buffer_len, DP_NETDEV_HEADROOM);
+ memcpy(dp_packet_data(buffer),
+ (uint8_t *) ppd + ppd->tp_mac - virtio_net_hdr_size,
+ ppd->tp_snaplen + virtio_net_hdr_size);
+ dp_packet_set_size(buffer,
+ dp_packet_size(buffer) + ppd->tp_snaplen
+ + virtio_net_hdr_size);
+
+ if (virtio_net_hdr_size && netdev_linux_parse_vnet_hdr(buffer)) {
+ /* Unexpected error situation: the virtio header is not present
+ * or corrupted. Drop the packet but continue in case next ones
+ * are correct. */
+ dp_packet_delete(buffer);
+ netdev->rx_dropped += 1;
+ VLOG_WARN_RL(&rl, "%s: Dropped packet: Invalid virtio net header",
+ netdev_get_name(netdev_));
+ } else {
+ if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
+ struct eth_header *eth;
+ bool double_tagged;
+ ovs_be16 vlan_tpid;
+
+ eth = dp_packet_data(buffer);
+ double_tagged = eth->eth_type == htons(ETH_TYPE_VLAN_8021Q);
+ if (ppd->tp_status & TP_STATUS_VLAN_TPID_VALID) {
+ vlan_tpid = htons(ppd->hv1.tp_vlan_tpid);
+ } else if (double_tagged) {
+ vlan_tpid = htons(ETH_TYPE_VLAN_8021AD);
+ } else {
+ vlan_tpid = htons(ETH_TYPE_VLAN_8021Q);
+ }
+ eth_push_vlan(buffer, vlan_tpid, htons(ppd->hv1.tp_vlan_tci));
+ }
+ dp_packet_batch_add(batch, buffer);
+ }
+
+ fn_in_block++;
+ if (fn_in_block >= pbd->hdr.bh1.num_pkts) {
+ pbd->hdr.bh1.block_status = TP_STATUS_KERNEL;
+ block_num = (block_num + 1) %
+ netdev->tp_rx_ring->req.tp_block_nr;
+ pbd = (struct tpacket_block_desc *)
+ netdev->tp_rx_ring->rd[block_num].iov_base;
+ fn_in_block = 0;
+ ppd = NULL;
+ } else {
+ ppd = ALIGNED_CAST(struct tpacket3_hdr *,
+ (uint8_t *) ppd + ppd->tp_next_offset);
+ }
+ i++;
+ }
+
+ netdev->tp_rx_ring->block_num = block_num;
+ netdev->tp_rx_ring->frame_num_in_block = fn_in_block;
+ netdev->tp_rx_ring->ppd = ppd;
+
+ return 0;
+}
+#endif /* HAVE_TPACKET_V3 */
+
static int
netdev_linux_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet_batch *batch,
int *qfill)
@@ -1466,9 +1742,15 @@ netdev_linux_rxq_recv(struct netdev_rxq *rxq_, struct dp_packet_batch *batch,
}
dp_packet_batch_init(batch);
- retval = (rx->is_tap
- ? netdev_linux_batch_rxq_recv_tap(rx, mtu, batch)
- : netdev_linux_batch_rxq_recv_sock(rx, mtu, batch));
+ if (rx->is_tap) {
+ retval = netdev_linux_batch_rxq_recv_tap(rx, mtu, batch);
+ } else {
+#ifndef HAVE_TPACKET_V3
+ retval = netdev_linux_batch_rxq_recv_sock(rx, mtu, batch);
+#else
+ retval = netdev_linux_batch_recv_tpacket(rx, mtu, batch);
+#endif
+ }
if (retval) {
if (retval != EAGAIN && retval != EMSGSIZE) {
@@ -1509,6 +1791,7 @@ netdev_linux_rxq_drain(struct netdev_rxq *rxq_)
}
}
+#ifndef HAVE_TPACKET_V3
static int
netdev_linux_sock_batch_send(int sock, int ifindex, bool tso, int mtu,
struct dp_packet_batch *batch)
@@ -1553,6 +1836,7 @@ netdev_linux_sock_batch_send(int sock, int ifindex, bool tso, int mtu,
free(iov);
return error;
}
+#endif /* HAVE_TPACKET_V3 */
/* Use the tap fd to send 'batch' to tap device 'netdev'. Using the tap fd is
* essential, because packets sent to a tap device with an AF_PACKET socket
@@ -1673,6 +1957,83 @@ netdev_linux_get_numa_id(const struct netdev *netdev_)
return numa_id;
}
+#ifdef HAVE_TPACKET_V3
+static inline int
+tpacket_tx_is_ready(void * next_frame)
+{
+ struct tpacket3_hdr *hdr = ALIGNED_CAST(struct tpacket3_hdr *, next_frame);
+
+ return !(hdr->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING));
+}
+
+static int
+netdev_linux_tpacket_batch_send(struct netdev *netdev_, bool tso, int mtu,
+ struct dp_packet_batch *batch)
+{
+ struct netdev_linux *netdev = netdev_linux_cast(netdev_);
+ struct dp_packet *packet;
+ int sockfd;
+ ssize_t bytes_sent;
+ int total_pkts = 0;
+
+ unsigned int frame_nr = netdev->tp_tx_ring->req.tp_frame_nr;
+ unsigned int frame_num = netdev->tp_tx_ring->frame_num;
+
+ /* The Linux tap driver returns EIO if the device is not up,
+ * so if the device is not up, don't waste time sending it.
+ * However, if the device is in another network namespace
+ * then OVS can't retrieve the state. In that case, send the
+ * packets anyway. */
+ if (netdev->present && !(netdev->ifi_flags & IFF_UP)) {
+ netdev->tx_dropped += dp_packet_batch_size(batch);
+ return 0;
+ }
+
+ DP_PACKET_BATCH_FOR_EACH (i, packet, batch) {
+ size_t size;
+ struct tpacket3_hdr *ppd;
+
+ if (tso) {
+ netdev_linux_prepend_vnet_hdr(packet, mtu);
+ }
+
+ size = dp_packet_size(packet);
+ ppd = tpacket_get_next_frame(netdev->tp_tx_ring, frame_num);
+
+ if (!tpacket_tx_is_ready(ppd)) {
+ break;
+ }
+ ppd->tp_snaplen = size;
+ ppd->tp_len = size;
+ ppd->tp_next_offset = 0;
+
+ memcpy((uint8_t *)ppd + TPACKET3_HDRLEN - sizeof(struct sockaddr_ll),
+ dp_packet_data(packet),
+ size);
+ ppd->tp_status = TP_STATUS_SEND_REQUEST;
+ frame_num = (frame_num + 1) % frame_nr;
+ total_pkts++;
+ }
+ netdev->tp_tx_ring->frame_num = frame_num;
+
+ /* Kick-off transmits */
+ if (total_pkts != 0) {
+ sockfd = netdev->tp_tx_ring->sockfd;
+ bytes_sent = sendto(sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0);
+ if (bytes_sent == -1 &&
+ errno != ENOBUFS && errno != EAGAIN) {
+ /*
+ * In case of an ENOBUFS/EAGAIN error all of the enqueued
+ * packets will be considered successful even though only some
+ * are sent.
+ */
+ netdev->tx_dropped += dp_packet_batch_size(batch);
+ }
+ }
+ return 0;
+}
+#endif
+
/* Sends 'batch' on 'netdev'. Returns 0 if successful, otherwise a positive
* errno value. Returns EAGAIN without blocking if the packet cannot be queued
* immediately. Returns EMSGSIZE if a partial packet was transmitted or if
@@ -1712,7 +2073,11 @@ netdev_linux_send(struct netdev *netdev_, int qid OVS_UNUSED,
goto free_batch;
}
+#ifndef HAVE_TPACKET_V3
error = netdev_linux_sock_batch_send(sock, ifindex, tso, mtu, batch);
+#else
+ error = netdev_linux_tpacket_batch_send(netdev_, tso, mtu, batch);
+#endif
} else {
error = netdev_linux_tap_batch_send(netdev_, tso, mtu, batch);
}