aboutsummaryrefslogtreecommitdiffstats
path: root/src/plugins/af_packet
diff options
context:
space:
mode:
authorMohsin Kazmi <sykazmi@cisco.com>2022-12-14 13:10:29 +0000
committerDave Wallace <dwallacelf@gmail.com>2022-12-21 18:33:51 +0000
commitbca76580b17bbb6227f48b9ea4a5858802656962 (patch)
treeba8df625df7a4de1ea5fd970493d7cda74deedb7 /src/plugins/af_packet
parentbb98aac4223f506ec18109f9836daa6ef0d61180 (diff)
af_packet: move to plugin
Type: improvement Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com> Change-Id: I3ec857adb3a9e8a778072a202a4d23f4101e83b2
Diffstat (limited to 'src/plugins/af_packet')
-rw-r--r--src/plugins/af_packet/CMakeLists.txt36
-rw-r--r--src/plugins/af_packet/FEATURE.yaml16
-rw-r--r--src/plugins/af_packet/af_packet.api192
-rw-r--r--src/plugins/af_packet/af_packet.c879
-rw-r--r--src/plugins/af_packet/af_packet.h179
-rw-r--r--src/plugins/af_packet/af_packet_api.c253
-rw-r--r--src/plugins/af_packet/cli.c295
-rw-r--r--src/plugins/af_packet/device.c836
-rw-r--r--src/plugins/af_packet/dir.dox29
-rw-r--r--src/plugins/af_packet/node.c845
-rw-r--r--src/plugins/af_packet/plugin.c22
11 files changed, 3582 insertions, 0 deletions
diff --git a/src/plugins/af_packet/CMakeLists.txt b/src/plugins/af_packet/CMakeLists.txt
new file mode 100644
index 00000000000..4b79615cae7
--- /dev/null
+++ b/src/plugins/af_packet/CMakeLists.txt
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: Apache-2.0
+# Copyright (c) 2022 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+add_vpp_plugin(af_packet
+ SOURCES
+ plugin.c
+ af_packet.c
+ device.c
+ node.c
+ cli.c
+ af_packet_api.c
+
+ MULTIARCH_SOURCES
+ node.c
+ device.c
+
+ INSTALL_HEADERS
+ af_packet.h
+
+ API_FILES
+ af_packet.api
+
+ # API_TEST_SOURCES
+ #af_packet_test_api.c
+)
diff --git a/src/plugins/af_packet/FEATURE.yaml b/src/plugins/af_packet/FEATURE.yaml
new file mode 100644
index 00000000000..4a11ea2beb5
--- /dev/null
+++ b/src/plugins/af_packet/FEATURE.yaml
@@ -0,0 +1,16 @@
+---
+name: host-interface Device AF_PACKET
+maintainer: Damjan Marion <damarion@cisco.com>
+features:
+ - L4 checksum offload
+ - GSO offload
+description: "Create a host interface that will attach to a linux AF_PACKET
+ interface, one side of a veth pair. The veth pair must
+ already exist. Once created, a new host interface will
+ exist in VPP with the name 'host-<ifname>', where '<ifname>'
+ is the name of the specified veth pair. Use the 'show interface'
+ command to display host interface details."
+missing:
+ - API dump details beyond sw_if_index and name
+state: production
+properties: [API, CLI, STATS, MULTITHREAD]
diff --git a/src/plugins/af_packet/af_packet.api b/src/plugins/af_packet/af_packet.api
new file mode 100644
index 00000000000..a12da37796a
--- /dev/null
+++ b/src/plugins/af_packet/af_packet.api
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2015-2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+option version = "2.0.0";
+
+import "vnet/interface_types.api";
+import "vnet/ethernet/ethernet_types.api";
+
+/** \brief Create host-interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param hw_addr - interface MAC
+ @param use_random_hw_addr - use random generated MAC
+ @param host_if_name - interface name
+*/
+define af_packet_create
+{
+ u32 client_index;
+ u32 context;
+
+ vl_api_mac_address_t hw_addr;
+ bool use_random_hw_addr;
+ string host_if_name[64];
+};
+
+/** \brief Create host-interface response
+ @param context - sender context, to match reply w/ request
+ @param retval - return value for request
+*/
+define af_packet_create_reply
+{
+ u32 context;
+ i32 retval;
+ vl_api_interface_index_t sw_if_index;
+};
+
+/** \brief Create host-interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param hw_addr - interface MAC
+ @param use_random_hw_addr - use random generated MAC
+ @param host_if_name - interface name
+ @param rx_frame_size - frame size for RX
+ @param tx_frame_size - frame size for TX
+ @param rx_frames_per_block - frames per block for RX
+ @param tx_frames_per_block - frames per block for TX
+ @param flags - flags for the af_packet interface creation
+ @param num_rx_queues - number of rx queues
+*/
+define af_packet_create_v2
+{
+ u32 client_index;
+ u32 context;
+
+ vl_api_mac_address_t hw_addr;
+ bool use_random_hw_addr;
+ string host_if_name[64];
+ u32 rx_frame_size;
+ u32 tx_frame_size;
+ u32 rx_frames_per_block;
+ u32 tx_frames_per_block;
+ u32 flags;
+ u16 num_rx_queues [default=1];
+};
+
+/** \brief Create host-interface response
+ @param context - sender context, to match reply w/ request
+ @param retval - return value for request
+*/
+define af_packet_create_v2_reply
+{
+ u32 context;
+ i32 retval;
+ vl_api_interface_index_t sw_if_index;
+};
+
+enum af_packet_mode {
+ AF_PACKET_API_MODE_ETHERNET = 1, /* mode ethernet */
+ AF_PACKET_API_MODE_IP = 2, /* mode ip */
+};
+
+enum af_packet_flags {
+ AF_PACKET_API_FLAG_QDISC_BYPASS = 1, /* enable the qdisc bypass */
+ AF_PACKET_API_FLAG_CKSUM_GSO = 2, /* enable checksum/gso */
+ AF_PACKET_API_FLAG_VERSION_2 = 8 [backwards_compatible], /* af packet v2, default is v3 */
+};
+
+/** \brief Create host-interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param mode - 1 - Ethernet, 2 - IP
+ @param hw_addr - interface MAC
+ @param use_random_hw_addr - use random generated MAC
+ @param host_if_name - interface name
+ @param rx_frame_size - frame size for RX
+ @param tx_frame_size - frame size for TX
+ @param rx_frames_per_block - frames per block for RX
+ @param tx_frames_per_block - frames per block for TX
+ @param flags - flags for the af_packet interface creation
+ @param num_rx_queues - number of rx queues
+ @param num_tx_queues - number of tx queues
+*/
+define af_packet_create_v3
+{
+ u32 client_index;
+ u32 context;
+
+ vl_api_af_packet_mode_t mode;
+ vl_api_mac_address_t hw_addr;
+ bool use_random_hw_addr;
+ string host_if_name[64];
+ u32 rx_frame_size;
+ u32 tx_frame_size;
+ u32 rx_frames_per_block;
+ u32 tx_frames_per_block;
+ vl_api_af_packet_flags_t flags;
+ u16 num_rx_queues [default=1];
+ u16 num_tx_queues [default=1];
+};
+
+/** \brief Create host-interface response
+ @param context - sender context, to match reply w/ request
+ @param retval - return value for request
+*/
+define af_packet_create_v3_reply
+{
+ u32 context;
+ i32 retval;
+ vl_api_interface_index_t sw_if_index;
+};
+
+/** \brief Delete host-interface
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+ @param host_if_name - interface name
+*/
+autoreply define af_packet_delete
+{
+ u32 client_index;
+ u32 context;
+
+ string host_if_name[64];
+};
+
+/** \brief Set l4 offload checksum calculation
+ @param client_index - opaque cookie to identify the sender
+ @param context - sender context, to match reply w/ request
+*/
+autoreply define af_packet_set_l4_cksum_offload
+{
+ u32 client_index;
+ u32 context;
+
+ vl_api_interface_index_t sw_if_index;
+ bool set;
+};
+
+/** \brief Dump af_packet interfaces request */
+define af_packet_dump
+{
+ u32 client_index;
+ u32 context;
+};
+
+/** \brief Reply for af_packet dump request
+ @param sw_if_index - software index of af_packet interface
+ @param host_if_name - interface name
+*/
+define af_packet_details
+{
+ u32 context;
+ vl_api_interface_index_t sw_if_index;
+ string host_if_name[64];
+};
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/af_packet.c b/src/plugins/af_packet/af_packet.c
new file mode 100644
index 00000000000..b2f860e658d
--- /dev/null
+++ b/src/plugins/af_packet/af_packet.c
@@ -0,0 +1,879 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet.c - linux kernel packet interface
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include <vppinfra/linux/sysfs.h>
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/devices/netlink.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/interface/rx_queue_funcs.h>
+#include <vnet/interface/tx_queue_funcs.h>
+
+#include <af_packet/af_packet.h>
+
+af_packet_main_t af_packet_main;
+
+VNET_HW_INTERFACE_CLASS (af_packet_ip_device_hw_interface_class, static) = {
+ .name = "af-packet-ip-device",
+ .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
+};
+
+#define AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK 1024
+#define AF_PACKET_DEFAULT_TX_FRAME_SIZE (2048 * 33) // GSO packet of 64KB
+#define AF_PACKET_TX_BLOCK_NR 1
+
+#define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2 1024
+#define AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2 (2048 * 33) // GSO packet of 64KB
+#define AF_PACKET_RX_BLOCK_NR_V2 1
+
+#define AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK 32
+#define AF_PACKET_DEFAULT_RX_FRAME_SIZE 2048
+#define AF_PACKET_RX_BLOCK_NR 160
+
+/*defined in net/if.h but clashes with dpdk headers */
+unsigned int if_nametoindex (const char *ifname);
+
+static clib_error_t *
+af_packet_eth_set_max_frame_size (vnet_main_t *vnm, vnet_hw_interface_t *hi,
+ u32 frame_size)
+{
+ clib_error_t *error, *rv;
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, hi->dev_instance);
+
+ error = vnet_netlink_set_link_mtu (apif->host_if_index,
+ frame_size + hi->frame_overhead);
+
+ if (error)
+ {
+ vlib_log_err (apm->log_class, "netlink failed to change MTU: %U",
+ format_clib_error, error);
+ rv = vnet_error (VNET_ERR_SYSCALL_ERROR_1, "netlink error: %U",
+ format_clib_error, error);
+ clib_error_free (error);
+ return rv;
+ }
+ else
+ apif->host_mtu = frame_size + hi->frame_overhead;
+ return 0;
+}
+
+static int
+af_packet_read_mtu (af_packet_if_t *apif)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ clib_error_t *error;
+ error = vnet_netlink_get_link_mtu (apif->host_if_index, &apif->host_mtu);
+ if (error)
+ {
+ vlib_log_err (apm->log_class, "netlink failed to get MTU: %U",
+ format_clib_error, error);
+ clib_error_free (error);
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+ }
+ return 0;
+}
+
+static clib_error_t *
+af_packet_fd_read_ready (clib_file_t * uf)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+
+ /* Schedule the rx node */
+ vnet_hw_if_rx_queue_set_int_pending (vnm, uf->private_data);
+ return 0;
+}
+
+static int
+is_bridge (const u8 * host_if_name)
+{
+ u8 *s;
+ DIR *dir = NULL;
+
+ s = format (0, "/sys/class/net/%s/bridge%c", host_if_name, 0);
+ dir = opendir ((char *) s);
+ vec_free (s);
+
+ if (dir)
+ {
+ closedir (dir);
+ return 0;
+ }
+
+ return -1;
+}
+
+static void
+af_packet_set_rx_queues (vlib_main_t *vm, af_packet_if_t *apif)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ af_packet_queue_t *rx_queue;
+
+ vnet_hw_if_set_input_node (vnm, apif->hw_if_index,
+ af_packet_input_node.index);
+
+ vec_foreach (rx_queue, apif->rx_queues)
+ {
+ rx_queue->queue_index = vnet_hw_if_register_rx_queue (
+ vnm, apif->hw_if_index, rx_queue->queue_id, VNET_HW_IF_RXQ_THREAD_ANY);
+
+ {
+ clib_file_t template = { 0 };
+ template.read_function = af_packet_fd_read_ready;
+ template.file_descriptor = rx_queue->fd;
+ template.private_data = rx_queue->queue_index;
+ template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
+ template.description =
+ format (0, "%U queue %u", format_af_packet_device_name,
+ apif->dev_instance, rx_queue->queue_id);
+ rx_queue->clib_file_index = clib_file_add (&file_main, &template);
+ }
+ vnet_hw_if_set_rx_queue_file_index (vnm, rx_queue->queue_index,
+ rx_queue->clib_file_index);
+ vnet_hw_if_set_rx_queue_mode (vnm, rx_queue->queue_index,
+ VNET_HW_IF_RX_MODE_INTERRUPT);
+ rx_queue->mode = VNET_HW_IF_RX_MODE_INTERRUPT;
+ }
+ vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
+}
+
+static void
+af_packet_set_tx_queues (vlib_main_t *vm, af_packet_if_t *apif)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_queue_t *tx_queue;
+
+ vec_foreach (tx_queue, apif->tx_queues)
+ {
+ tx_queue->queue_index = vnet_hw_if_register_tx_queue (
+ vnm, apif->hw_if_index, tx_queue->queue_id);
+ }
+
+ if (apif->num_txqs == 0)
+ {
+ vlib_log_err (apm->log_class, "Interface %U has 0 txq",
+ format_vnet_hw_if_index_name, vnm, apif->hw_if_index);
+ return;
+ }
+
+ for (u32 j = 0; j < vlib_get_n_threads (); j++)
+ {
+ u32 qi = apif->tx_queues[j % apif->num_txqs].queue_index;
+ vnet_hw_if_tx_queue_assign_thread (vnm, qi, j);
+ }
+
+ vnet_hw_if_update_runtime_data (vnm, apif->hw_if_index);
+}
+
+static int
+create_packet_sock (int host_if_index, tpacket_req_u_t *rx_req,
+ tpacket_req_u_t *tx_req, int *fd, af_packet_ring_t *ring,
+ u32 fanout_id, af_packet_if_flags_t *flags, int ver)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ struct sockaddr_ll sll;
+ socklen_t req_sz = sizeof (tpacket_req3_t);
+ int ret;
+ u32 ring_sz = 0;
+
+ if ((*fd = socket (AF_PACKET, SOCK_RAW, htons (ETH_P_ALL))) < 0)
+ {
+ vlib_log_err (apm->log_class,
+ "Failed to create AF_PACKET socket: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ /* bind before rx ring is cfged so we don't receive packets from other interfaces */
+ clib_memset (&sll, 0, sizeof (sll));
+ sll.sll_family = PF_PACKET;
+ sll.sll_protocol = htons (ETH_P_ALL);
+ sll.sll_ifindex = host_if_index;
+ if (bind (*fd, (struct sockaddr *) &sll, sizeof (sll)) < 0)
+ {
+ vlib_log_err (apm->log_class,
+ "Failed to bind rx packet socket: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ if (setsockopt (*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof (ver)) < 0)
+ {
+ vlib_log_err (apm->log_class,
+ "Failed to set rx packet interface version: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ int opt = 1;
+ if (setsockopt (*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof (opt)) < 0)
+ {
+ vlib_log_err (
+ apm->log_class,
+ "Failed to set packet tx ring error handling option: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ if (*flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
+ {
+
+ int opt2 = 1;
+ if (setsockopt (*fd, SOL_PACKET, PACKET_VNET_HDR, &opt2, sizeof (opt2)) <
+ 0)
+ {
+ // remove the flag
+ *flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
+ vlib_log_debug (apm->log_class,
+ "Failed to set packet vnet hdr error handling "
+ "option: %s (errno %d)",
+ strerror (errno), errno);
+ }
+ }
+
+#if defined(PACKET_QDISC_BYPASS)
+ if (*flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS)
+ /* Introduced with Linux 3.14 so the ifdef should eventually be removed */
+ if (setsockopt (*fd, SOL_PACKET, PACKET_QDISC_BYPASS, &opt, sizeof (opt)) <
+ 0)
+ {
+ // remove the flag
+ *flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
+ vlib_log_debug (apm->log_class,
+ "Failed to set qdisc bypass error "
+ "handling option: %s (errno %d)",
+ strerror (errno), errno);
+ }
+#endif
+
+ if (rx_req)
+ {
+ if (*flags & AF_PACKET_IF_FLAGS_FANOUT)
+ {
+ int fanout = ((fanout_id & 0xffff) | ((PACKET_FANOUT_HASH) << 16));
+ if (setsockopt (*fd, SOL_PACKET, PACKET_FANOUT, &fanout,
+ sizeof (fanout)) < 0)
+ {
+ // remove the flag
+ *flags &= ~AF_PACKET_IF_FLAGS_FANOUT;
+ vlib_log_err (apm->log_class,
+ "Failed to set fanout options: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+ }
+ if (ver == TPACKET_V2)
+ {
+ req_sz = sizeof (tpacket_req_t);
+ ring_sz += rx_req->req.tp_block_size * rx_req->req.tp_block_nr;
+ }
+ else
+ ring_sz += rx_req->req3.tp_block_size * rx_req->req3.tp_block_nr;
+ if (setsockopt (*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz) < 0)
+ {
+ vlib_log_err (apm->log_class,
+ "Failed to set packet rx ring options: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+ }
+
+ if (tx_req)
+ {
+ if (ver == TPACKET_V2)
+ {
+ req_sz = sizeof (tpacket_req_t);
+ ring_sz += tx_req->req.tp_block_size * tx_req->req.tp_block_nr;
+ }
+ else
+ ring_sz += tx_req->req3.tp_block_size * tx_req->req3.tp_block_nr;
+ if (setsockopt (*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz) < 0)
+ {
+ vlib_log_err (apm->log_class,
+ "Failed to set packet tx ring options: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+ }
+ ring->ring_start_addr = mmap (NULL, ring_sz, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_LOCKED, *fd, 0);
+ if (ring->ring_start_addr == MAP_FAILED)
+ {
+ vlib_log_err (apm->log_class, "mmap failure: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ ring->ring_size = ring_sz;
+
+ return 0;
+error:
+ if (*fd >= 0)
+ {
+ close (*fd);
+ *fd = -1;
+ }
+ return ret;
+}
+
+int
+af_packet_queue_init (vlib_main_t *vm, af_packet_if_t *apif,
+ af_packet_create_if_arg_t *arg,
+ af_packet_queue_t *rx_queue, af_packet_queue_t *tx_queue,
+ u8 queue_id)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ tpacket_req_u_t *rx_req = 0;
+ tpacket_req_u_t *tx_req = 0;
+ int ret, fd = -1;
+ af_packet_ring_t ring = { 0 };
+ u8 *ring_addr = 0;
+ u32 rx_frames_per_block, tx_frames_per_block;
+ u32 rx_frame_size, tx_frame_size;
+ u32 i = 0;
+
+ if (rx_queue)
+ {
+ rx_frames_per_block = arg->rx_frames_per_block ?
+ arg->rx_frames_per_block :
+ ((apif->version == TPACKET_V3) ?
+ AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK :
+ AF_PACKET_DEFAULT_RX_FRAMES_PER_BLOCK_V2);
+
+ rx_frame_size =
+ arg->rx_frame_size ?
+ arg->rx_frame_size :
+ ((apif->version == TPACKET_V3) ? AF_PACKET_DEFAULT_RX_FRAME_SIZE :
+ AF_PACKET_DEFAULT_RX_FRAME_SIZE_V2);
+ vec_validate (rx_queue->rx_req, 0);
+ rx_queue->rx_req->req.tp_block_size =
+ rx_frame_size * rx_frames_per_block;
+ rx_queue->rx_req->req.tp_frame_size = rx_frame_size;
+ rx_queue->rx_req->req.tp_block_nr = (apif->version == TPACKET_V3) ?
+ AF_PACKET_RX_BLOCK_NR :
+ AF_PACKET_RX_BLOCK_NR_V2;
+ rx_queue->rx_req->req.tp_frame_nr =
+ rx_queue->rx_req->req.tp_block_nr * rx_frames_per_block;
+ if (apif->version == TPACKET_V3)
+ {
+ rx_queue->rx_req->req3.tp_retire_blk_tov = 1; // 1 ms block timout
+ rx_queue->rx_req->req3.tp_feature_req_word = 0;
+ rx_queue->rx_req->req3.tp_sizeof_priv = 0;
+ }
+ rx_req = rx_queue->rx_req;
+ }
+ if (tx_queue)
+ {
+ tx_frames_per_block = arg->tx_frames_per_block ?
+ arg->tx_frames_per_block :
+ AF_PACKET_DEFAULT_TX_FRAMES_PER_BLOCK;
+ tx_frame_size = arg->tx_frame_size ? arg->tx_frame_size :
+ AF_PACKET_DEFAULT_TX_FRAME_SIZE;
+
+ vec_validate (tx_queue->tx_req, 0);
+ tx_queue->tx_req->req.tp_block_size =
+ tx_frame_size * tx_frames_per_block;
+ tx_queue->tx_req->req.tp_frame_size = tx_frame_size;
+ tx_queue->tx_req->req.tp_block_nr = AF_PACKET_TX_BLOCK_NR;
+ tx_queue->tx_req->req.tp_frame_nr =
+ AF_PACKET_TX_BLOCK_NR * tx_frames_per_block;
+ if (apif->version == TPACKET_V3)
+ {
+ tx_queue->tx_req->req3.tp_retire_blk_tov = 0;
+ tx_queue->tx_req->req3.tp_sizeof_priv = 0;
+ tx_queue->tx_req->req3.tp_feature_req_word = 0;
+ }
+ tx_req = tx_queue->tx_req;
+ }
+
+ if (rx_queue || tx_queue)
+ {
+ ret =
+ create_packet_sock (apif->host_if_index, rx_req, tx_req, &fd, &ring,
+ apif->dev_instance, &arg->flags, apif->version);
+
+ if (ret != 0)
+ goto error;
+
+ vec_add1 (apif->rings, ring);
+ ring_addr = ring.ring_start_addr;
+ }
+
+ if (rx_queue)
+ {
+ rx_queue->fd = fd;
+ vec_validate (rx_queue->rx_ring, rx_queue->rx_req->req.tp_block_nr - 1);
+ vec_foreach_index (i, rx_queue->rx_ring)
+ {
+ rx_queue->rx_ring[i] =
+ ring_addr + i * rx_queue->rx_req->req.tp_block_size;
+ }
+
+ rx_queue->next_rx_block = 0;
+ rx_queue->queue_id = queue_id;
+ rx_queue->is_rx_pending = 0;
+ ring_addr = ring_addr + rx_queue->rx_req->req.tp_block_size *
+ rx_queue->rx_req->req.tp_block_nr;
+ }
+
+ if (tx_queue)
+ {
+ tx_queue->fd = fd;
+ vec_validate (tx_queue->tx_ring, tx_queue->tx_req->req.tp_block_nr - 1);
+ vec_foreach_index (i, tx_queue->tx_ring)
+ {
+ tx_queue->tx_ring[i] =
+ ring_addr + i * tx_queue->tx_req->req.tp_block_size;
+ }
+
+ tx_queue->next_tx_frame = 0;
+ tx_queue->queue_id = queue_id;
+ tx_queue->is_tx_pending = 0;
+ clib_spinlock_init (&tx_queue->lockp);
+ }
+
+ return 0;
+error:
+ vlib_log_err (apm->log_class, "Failed to set queue %u error", queue_id);
+ if (rx_queue)
+ vec_free (rx_queue->rx_req);
+ if (tx_queue)
+ vec_free (tx_queue->tx_req);
+ return ret;
+}
+
+int
+af_packet_device_init (vlib_main_t *vm, af_packet_if_t *apif,
+ af_packet_create_if_arg_t *args)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_queue_t *rx_queue = 0;
+ af_packet_queue_t *tx_queue = 0;
+ u16 nq = clib_min (args->num_rxqs, args->num_txqs);
+ u16 i = 0;
+ int ret = 0;
+
+ // enable fanout feature for multi-rxqs
+ if (args->num_rxqs > 1)
+ args->flags |= AF_PACKET_IF_FLAGS_FANOUT;
+
+ vec_validate (apif->rx_queues, args->num_rxqs - 1);
+ vec_validate (apif->tx_queues, args->num_txqs - 1);
+
+ for (; i < nq; i++)
+ {
+ rx_queue = vec_elt_at_index (apif->rx_queues, i);
+ tx_queue = vec_elt_at_index (apif->tx_queues, i);
+ ret = af_packet_queue_init (vm, apif, args, rx_queue, tx_queue, i);
+ if (ret != 0)
+ goto error;
+ }
+
+ if (args->num_rxqs > args->num_txqs)
+ {
+ for (; i < args->num_rxqs; i++)
+ {
+ rx_queue = vec_elt_at_index (apif->rx_queues, i);
+ ret = af_packet_queue_init (vm, apif, args, rx_queue, 0, i);
+ if (ret != 0)
+ goto error;
+ }
+ }
+ else if (args->num_txqs > args->num_rxqs)
+ {
+ for (; i < args->num_txqs; i++)
+ {
+ tx_queue = vec_elt_at_index (apif->tx_queues, i);
+ ret = af_packet_queue_init (vm, apif, args, 0, tx_queue, i);
+ if (ret != 0)
+ goto error;
+ }
+ }
+
+ apif->num_rxqs = args->num_rxqs;
+ apif->num_txqs = args->num_txqs;
+
+ return 0;
+error:
+ vlib_log_err (apm->log_class, "Failed to init device error");
+ return ret;
+}
+
+int
+af_packet_create_if (af_packet_create_if_arg_t *arg)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ vlib_main_t *vm = vlib_get_main ();
+ int fd2 = -1;
+ struct ifreq ifr;
+ af_packet_if_t *apif = 0;
+ u8 hw_addr[6];
+ vnet_sw_interface_t *sw;
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_hw_if_caps_t caps = VNET_HW_IF_CAP_INT_MODE;
+ uword *p;
+ uword if_index;
+ u8 *host_if_name_dup = 0;
+ int host_if_index = -1;
+ int ret = 0;
+
+ p = mhash_get (&apm->if_index_by_host_if_name, arg->host_if_name);
+ if (p)
+ {
+ apif = vec_elt_at_index (apm->interfaces, p[0]);
+ arg->sw_if_index = apif->sw_if_index;
+ return VNET_API_ERROR_IF_ALREADY_EXISTS;
+ }
+
+ host_if_name_dup = vec_dup (arg->host_if_name);
+
+ /*
+ * make sure host side of interface is 'UP' before binding AF_PACKET
+ * socket on it.
+ */
+ if ((fd2 = socket (AF_UNIX, SOCK_DGRAM, 0)) < 0)
+ {
+ vlib_log_debug (apm->log_class,
+ "Failed to create AF_UNIX socket: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ clib_memcpy (ifr.ifr_name, (const char *) arg->host_if_name,
+ vec_len (arg->host_if_name));
+ if (ioctl (fd2, SIOCGIFINDEX, &ifr) < 0)
+ {
+ vlib_log_debug (
+ apm->log_class,
+ "Failed to retrieve the interface (%s) index: %s (errno %d)",
+ arg->host_if_name, strerror (errno), errno);
+ ret = VNET_API_ERROR_INVALID_INTERFACE;
+ goto error;
+ }
+
+ host_if_index = ifr.ifr_ifindex;
+ if (ioctl (fd2, SIOCGIFFLAGS, &ifr) < 0)
+ {
+ vlib_log_debug (apm->log_class,
+ "Failed to get the active flag: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ if (!(ifr.ifr_flags & IFF_UP))
+ {
+ ifr.ifr_flags |= IFF_UP;
+ if (ioctl (fd2, SIOCSIFFLAGS, &ifr) < 0)
+ {
+ vlib_log_debug (apm->log_class,
+ "Failed to set the active flag: %s (errno %d)",
+ strerror (errno), errno);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+ }
+
+ if (fd2 > -1)
+ {
+ close (fd2);
+ fd2 = -1;
+ }
+
+ ret = is_bridge (arg->host_if_name);
+ if (ret == 0) /* is a bridge, ignore state */
+ host_if_index = -1;
+
+ /* So far everything looks good, let's create interface */
+ pool_get (apm->interfaces, apif);
+ if_index = apif - apm->interfaces;
+
+ apif->dev_instance = if_index;
+ apif->host_if_index = host_if_index;
+ apif->host_if_name = host_if_name_dup;
+ apif->per_interface_next_index = ~0;
+ apif->mode = arg->mode;
+
+ if (arg->is_v2)
+ apif->version = TPACKET_V2;
+ else
+ apif->version = TPACKET_V3;
+
+ ret = af_packet_device_init (vm, apif, arg);
+ if (ret != 0)
+ goto error;
+
+ ret = af_packet_read_mtu (apif);
+ if (ret != 0)
+ goto error;
+
+
+ if (apif->mode != AF_PACKET_IF_MODE_IP)
+ {
+ vnet_eth_interface_registration_t eir = {};
+ /*use configured or generate random MAC address */
+ if (arg->hw_addr)
+ clib_memcpy (hw_addr, arg->hw_addr, 6);
+ else
+ {
+ f64 now = vlib_time_now (vm);
+ u32 rnd;
+ rnd = (u32) (now * 1e6);
+ rnd = random_u32 (&rnd);
+
+ clib_memcpy (hw_addr + 2, &rnd, sizeof (rnd));
+ hw_addr[0] = 2;
+ hw_addr[1] = 0xfe;
+ }
+
+ eir.dev_class_index = af_packet_device_class.index;
+ eir.dev_instance = apif->dev_instance;
+ eir.address = hw_addr;
+ eir.cb.set_max_frame_size = af_packet_eth_set_max_frame_size;
+ apif->hw_if_index = vnet_eth_register_interface (vnm, &eir);
+ }
+ else
+ {
+ apif->hw_if_index = vnet_register_interface (
+ vnm, af_packet_device_class.index, apif->dev_instance,
+ af_packet_ip_device_hw_interface_class.index, apif->dev_instance);
+ }
+
+ sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
+ apif->sw_if_index = sw->sw_if_index;
+
+ af_packet_set_rx_queues (vm, apif);
+ af_packet_set_tx_queues (vm, apif);
+
+ if (arg->flags & AF_PACKET_IF_FLAGS_FANOUT)
+ apif->is_fanout_enabled = 1;
+
+ apif->is_qdisc_bypass_enabled =
+ (arg->flags & AF_PACKET_IF_FLAGS_QDISC_BYPASS);
+
+ if (arg->flags & AF_PACKET_IF_FLAGS_CKSUM_GSO)
+ apif->is_cksum_gso_enabled = 1;
+
+ if (apif->is_cksum_gso_enabled)
+ caps |= VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_TX_IP4_CKSUM |
+ VNET_HW_IF_CAP_TX_TCP_CKSUM | VNET_HW_IF_CAP_TX_UDP_CKSUM;
+
+ vnet_hw_if_set_caps (vnm, apif->hw_if_index, caps);
+ vnet_hw_interface_set_flags (vnm, apif->hw_if_index,
+ VNET_HW_INTERFACE_FLAG_LINK_UP);
+
+ mhash_set_mem (&apm->if_index_by_host_if_name, host_if_name_dup, &if_index,
+ 0);
+ arg->sw_if_index = apif->sw_if_index;
+
+ return 0;
+
+error:
+ if (fd2 > -1)
+ {
+ close (fd2);
+ fd2 = -1;
+ }
+ vec_free (host_if_name_dup);
+ if (apif)
+ {
+ memset (apif, 0, sizeof (*apif));
+ pool_put (apm->interfaces, apif);
+ }
+ return ret;
+}
+
+static int
+af_packet_rx_queue_free (af_packet_if_t *apif, af_packet_queue_t *rx_queue)
+{
+ clib_file_del_by_index (&file_main, rx_queue->clib_file_index);
+ close (rx_queue->fd);
+ rx_queue->fd = -1;
+ rx_queue->rx_ring = NULL;
+ vec_free (rx_queue->rx_req);
+ rx_queue->rx_req = NULL;
+ return 0;
+}
+
+static int
+af_packet_tx_queue_free (af_packet_if_t *apif, af_packet_queue_t *tx_queue)
+{
+ close (tx_queue->fd);
+ tx_queue->fd = -1;
+ clib_spinlock_free (&tx_queue->lockp);
+ tx_queue->tx_ring = NULL;
+ vec_free (tx_queue->tx_req);
+ tx_queue->tx_req = NULL;
+ return 0;
+}
+
+static int
+af_packet_ring_free (af_packet_if_t *apif, af_packet_ring_t *ring)
+{
+ af_packet_main_t *apm = &af_packet_main;
+
+ if (ring)
+ {
+ // FIXME: unmap the memory
+ if (munmap (ring->ring_start_addr, ring->ring_size))
+ vlib_log_warn (apm->log_class,
+ "Host interface %s could not free ring %p of size %u",
+ apif->host_if_name, ring->ring_start_addr,
+ ring->ring_size);
+ else
+ ring->ring_start_addr = 0;
+ }
+
+ return 0;
+}
+
+int
+af_packet_delete_if (u8 *host_if_name)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_if_t *apif;
+ af_packet_queue_t *rx_queue;
+ af_packet_queue_t *tx_queue;
+ af_packet_ring_t *ring;
+ uword *p;
+
+ p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
+ if (p == NULL)
+ {
+ vlib_log_warn (apm->log_class, "Host interface %s does not exist",
+ host_if_name);
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+ }
+ apif = pool_elt_at_index (apm->interfaces, p[0]);
+
+ /* bring down the interface */
+ vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0);
+ if (apif->mode != AF_PACKET_IF_MODE_IP)
+ ethernet_delete_interface (vnm, apif->hw_if_index);
+ else
+ vnet_delete_hw_interface (vnm, apif->hw_if_index);
+
+ /* clean up */
+ vec_foreach (rx_queue, apif->rx_queues)
+ af_packet_rx_queue_free (apif, rx_queue);
+ vec_foreach (tx_queue, apif->tx_queues)
+ af_packet_tx_queue_free (apif, tx_queue);
+ vec_foreach (ring, apif->rings)
+ af_packet_ring_free (apif, ring);
+
+ vec_free (apif->rx_queues);
+ apif->rx_queues = NULL;
+ vec_free (apif->tx_queues);
+ apif->tx_queues = NULL;
+ vec_free (apif->rings);
+ apif->rings = NULL;
+
+ vec_free (apif->host_if_name);
+ apif->host_if_name = NULL;
+ apif->host_if_index = -1;
+
+ mhash_unset (&apm->if_index_by_host_if_name, host_if_name, p);
+
+ memset (apif, 0, sizeof (*apif));
+ pool_put (apm->interfaces, apif);
+
+ return 0;
+}
+
+int
+af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set)
+{
+ // deprecated ...
+ return 0;
+}
+
+int
+af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_if_t *apif;
+ af_packet_if_detail_t *r_af_packet_ifs = NULL;
+ af_packet_if_detail_t *af_packet_if = NULL;
+
+ pool_foreach (apif, apm->interfaces)
+ {
+ vec_add2 (r_af_packet_ifs, af_packet_if, 1);
+ af_packet_if->sw_if_index = apif->sw_if_index;
+ if (apif->host_if_name)
+ {
+ clib_memcpy (af_packet_if->host_if_name, apif->host_if_name,
+ MIN (ARRAY_LEN (af_packet_if->host_if_name) - 1,
+ strlen ((const char *) apif->host_if_name)));
+ }
+ }
+
+ *out_af_packet_ifs = r_af_packet_ifs;
+
+ return 0;
+}
+
+static clib_error_t *
+af_packet_init (vlib_main_t * vm)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ vlib_thread_main_t *tm = vlib_get_thread_main ();
+
+ clib_memset (apm, 0, sizeof (af_packet_main_t));
+
+ mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
+
+ vec_validate_aligned (apm->rx_buffers, tm->n_vlib_mains - 1,
+ CLIB_CACHE_LINE_BYTES);
+
+ apm->log_class = vlib_log_register_class ("af_packet", 0);
+ vlib_log_debug (apm->log_class, "initialized");
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (af_packet_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/af_packet.h b/src/plugins/af_packet/af_packet.h
new file mode 100644
index 00000000000..7aa5e6d5b9a
--- /dev/null
+++ b/src/plugins/af_packet/af_packet.h
@@ -0,0 +1,179 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet.h - linux kernel packet interface header file
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <linux/if_packet.h>
+
+#include <vppinfra/lock.h>
+#include <vlib/log.h>
+
+typedef struct tpacket_block_desc block_desc_t;
+typedef struct tpacket_req tpacket_req_t;
+typedef struct tpacket_req3 tpacket_req3_t;
+typedef struct tpacket2_hdr tpacket2_hdr_t;
+typedef struct tpacket3_hdr tpacket3_hdr_t;
+
+typedef union _tpacket_req_u
+{
+ tpacket_req_t req;
+ tpacket_req3_t req3;
+} tpacket_req_u_t;
+
+typedef enum
+{
+ AF_PACKET_IF_MODE_ETHERNET = 1,
+ AF_PACKET_IF_MODE_IP = 2
+} af_packet_if_mode_t;
+
+typedef enum
+{
+ AF_PACKET_IF_FLAGS_QDISC_BYPASS = 1,
+ AF_PACKET_IF_FLAGS_CKSUM_GSO = 2,
+ AF_PACKET_IF_FLAGS_FANOUT = 4,
+ AF_PACKET_IF_FLAGS_VERSION_2 = 8,
+} af_packet_if_flags_t;
+
+typedef struct
+{
+ u32 sw_if_index;
+ u8 host_if_name[64];
+} af_packet_if_detail_t;
+
+typedef struct
+{
+ u8 *ring_start_addr;
+ u32 ring_size;
+} af_packet_ring_t;
+
+typedef struct
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+ clib_spinlock_t lockp;
+ int fd;
+ union
+ {
+ tpacket_req_u_t *rx_req;
+ tpacket_req_u_t *tx_req;
+ };
+
+ union
+ {
+ u8 **rx_ring;
+ u8 **tx_ring;
+ };
+
+ union
+ {
+ u32 next_rx_block;
+ u32 next_rx_frame;
+ u32 next_tx_frame;
+ };
+
+ u16 queue_id;
+ u32 queue_index;
+
+ u32 clib_file_index;
+
+ u32 rx_frame_offset;
+ u16 num_rx_pkts;
+ u8 is_rx_pending;
+ u8 is_tx_pending;
+ vnet_hw_if_rx_mode mode;
+} af_packet_queue_t;
+
+typedef struct
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+ u32 hw_if_index;
+ u32 sw_if_index;
+ u32 per_interface_next_index;
+ af_packet_if_mode_t mode;
+ u8 is_admin_up;
+ u8 is_cksum_gso_enabled;
+ u8 version;
+ af_packet_queue_t *rx_queues;
+ af_packet_queue_t *tx_queues;
+
+ u8 num_rxqs;
+ u8 num_txqs;
+
+ u8 *host_if_name;
+ int host_if_index;
+
+ u32 host_mtu;
+ u32 dev_instance;
+
+ af_packet_ring_t *rings;
+ u8 is_qdisc_bypass_enabled;
+ u8 is_fanout_enabled;
+} af_packet_if_t;
+
+typedef struct
+{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
+ af_packet_if_t *interfaces;
+
+ u32 polling_count;
+ /* rx buffer cache */
+ u32 **rx_buffers;
+
+ /* hash of host interface names */
+ mhash_t if_index_by_host_if_name;
+
+ /** log class */
+ vlib_log_class_t log_class;
+} af_packet_main_t;
+
+typedef struct
+{
+ u8 *host_if_name;
+ u8 *hw_addr;
+ u32 rx_frame_size;
+ u32 tx_frame_size;
+ u32 rx_frames_per_block;
+ u32 tx_frames_per_block;
+ u8 num_rxqs;
+ u8 num_txqs;
+ u8 is_v2;
+ af_packet_if_mode_t mode;
+ af_packet_if_flags_t flags;
+
+ /* return */
+ u32 sw_if_index;
+} af_packet_create_if_arg_t;
+
+extern af_packet_main_t af_packet_main;
+extern vnet_device_class_t af_packet_device_class;
+extern vlib_node_registration_t af_packet_input_node;
+
+int af_packet_create_if (af_packet_create_if_arg_t *arg);
+int af_packet_delete_if (u8 *host_if_name);
+int af_packet_set_l4_cksum_offload (u32 sw_if_index, u8 set);
+int af_packet_dump_ifs (af_packet_if_detail_t ** out_af_packet_ifs);
+
+format_function_t format_af_packet_device_name;
+
+#define MIN(x,y) (((x)<(y))?(x):(y))
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/af_packet_api.c b/src/plugins/af_packet/af_packet_api.c
new file mode 100644
index 00000000000..ede057659e8
--- /dev/null
+++ b/src/plugins/af_packet/af_packet_api.c
@@ -0,0 +1,253 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet_api.c - af-packet api
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <vnet/vnet.h>
+#include <vlibmemory/api.h>
+
+#include <vnet/interface.h>
+#include <vnet/api_errno.h>
+#include <af_packet/af_packet.h>
+
+#include <vnet/format_fns.h>
+#include <af_packet/af_packet.api_enum.h>
+#include <af_packet/af_packet.api_types.h>
+
+#define REPLY_MSG_ID_BASE msg_id_base
+#include <vlibapi/api_helper_macros.h>
+
+static u16 msg_id_base;
+
+static void
+vl_api_af_packet_create_t_handler (vl_api_af_packet_create_t * mp)
+{
+ af_packet_create_if_arg_t _arg, *arg = &_arg;
+ vl_api_af_packet_create_reply_t *rmp;
+ int rv = 0;
+
+ clib_memset (arg, 0, sizeof (*arg));
+
+ arg->host_if_name = format (0, "%s", mp->host_if_name);
+ vec_add1 (arg->host_if_name, 0);
+
+ arg->hw_addr = mp->use_random_hw_addr ? 0 : mp->hw_addr;
+ arg->mode = AF_PACKET_IF_MODE_ETHERNET;
+ // Default flags
+ arg->flags = AF_PACKET_IF_FLAGS_QDISC_BYPASS | AF_PACKET_IF_FLAGS_CKSUM_GSO;
+ rv = af_packet_create_if (arg);
+
+ vec_free (arg->host_if_name);
+
+ REPLY_MACRO2 (VL_API_AF_PACKET_CREATE_REPLY, ({
+ rmp->sw_if_index = clib_host_to_net_u32 (arg->sw_if_index);
+ }));
+}
+
+static void
+vl_api_af_packet_create_v2_t_handler (vl_api_af_packet_create_v2_t *mp)
+{
+ af_packet_create_if_arg_t _arg, *arg = &_arg;
+ vl_api_af_packet_create_v2_reply_t *rmp;
+ int rv = 0;
+
+ clib_memset (arg, 0, sizeof (*arg));
+
+ arg->host_if_name = format (0, "%s", mp->host_if_name);
+ vec_add1 (arg->host_if_name, 0);
+
+ // Default number of rx/tx queue(s)
+ arg->num_rxqs = 1;
+ arg->num_txqs = 1;
+ arg->rx_frame_size = clib_net_to_host_u32 (mp->rx_frame_size);
+ arg->tx_frame_size = clib_net_to_host_u32 (mp->tx_frame_size);
+ arg->rx_frames_per_block = clib_net_to_host_u32 (mp->rx_frames_per_block);
+ arg->tx_frames_per_block = clib_net_to_host_u32 (mp->tx_frames_per_block);
+ arg->hw_addr = mp->use_random_hw_addr ? 0 : mp->hw_addr;
+ arg->mode = AF_PACKET_IF_MODE_ETHERNET;
+ // Default flags
+ arg->flags = AF_PACKET_IF_FLAGS_QDISC_BYPASS | AF_PACKET_IF_FLAGS_CKSUM_GSO;
+
+ if (mp->num_rx_queues > 1)
+ arg->num_rxqs = clib_net_to_host_u16 (mp->num_rx_queues);
+
+ rv = af_packet_create_if (arg);
+
+ vec_free (arg->host_if_name);
+ REPLY_MACRO2 (VL_API_AF_PACKET_CREATE_V2_REPLY, ({
+ rmp->sw_if_index = clib_host_to_net_u32 (arg->sw_if_index);
+ }));
+}
+
+static void
+vl_api_af_packet_create_v3_t_handler (vl_api_af_packet_create_v3_t *mp)
+{
+ af_packet_create_if_arg_t _arg, *arg = &_arg;
+ vl_api_af_packet_create_v3_reply_t *rmp;
+ int rv = 0;
+
+ clib_memset (arg, 0, sizeof (*arg));
+
+ arg->host_if_name = format (0, "%s", mp->host_if_name);
+ vec_add1 (arg->host_if_name, 0);
+
+ // Default number of rx/tx queue(s)
+ arg->num_rxqs = 1;
+ arg->num_txqs = 1;
+ arg->rx_frame_size = clib_net_to_host_u32 (mp->rx_frame_size);
+ arg->tx_frame_size = clib_net_to_host_u32 (mp->tx_frame_size);
+ arg->rx_frames_per_block = clib_net_to_host_u32 (mp->rx_frames_per_block);
+ arg->tx_frames_per_block = clib_net_to_host_u32 (mp->tx_frames_per_block);
+ arg->hw_addr = mp->use_random_hw_addr ? 0 : mp->hw_addr;
+
+ switch (clib_net_to_host_u32 (mp->mode))
+ {
+ case AF_PACKET_API_MODE_ETHERNET:
+ arg->mode = AF_PACKET_IF_MODE_ETHERNET;
+ break;
+ case AF_PACKET_API_MODE_IP:
+ arg->mode = AF_PACKET_IF_MODE_IP;
+ break;
+ default:
+ arg->sw_if_index = ~0;
+ rv = VNET_ERR_INVALID_VALUE;
+ goto error;
+ }
+
+ STATIC_ASSERT (((int) AF_PACKET_API_FLAG_QDISC_BYPASS ==
+ (int) AF_PACKET_IF_FLAGS_QDISC_BYPASS),
+ "af-packet qdisc-bypass api flag mismatch");
+ STATIC_ASSERT (
+ ((int) AF_PACKET_API_FLAG_CKSUM_GSO == (int) AF_PACKET_IF_FLAGS_CKSUM_GSO),
+ "af-packet checksum/gso offload api flag mismatch");
+
+ STATIC_ASSERT (
+ ((int) AF_PACKET_API_FLAG_VERSION_2 == (int) AF_PACKET_IF_FLAGS_VERSION_2),
+ "af-packet version 2 api flag mismatch");
+
+ // Default flags
+ arg->flags = clib_net_to_host_u32 (mp->flags);
+
+ if (clib_net_to_host_u16 (mp->num_rx_queues) > 1)
+ arg->num_rxqs = clib_net_to_host_u16 (mp->num_rx_queues);
+
+ if (clib_net_to_host_u16 (mp->num_tx_queues) > 1)
+ arg->num_txqs = clib_net_to_host_u16 (mp->num_tx_queues);
+
+ arg->is_v2 = (arg->flags & AF_PACKET_API_FLAG_VERSION_2) ? 1 : 0;
+ rv = af_packet_create_if (arg);
+
+error:
+ vec_free (arg->host_if_name);
+ REPLY_MACRO2 (VL_API_AF_PACKET_CREATE_V3_REPLY, ({
+ rmp->sw_if_index = clib_host_to_net_u32 (arg->sw_if_index);
+ }));
+}
+
+static void
+vl_api_af_packet_delete_t_handler (vl_api_af_packet_delete_t * mp)
+{
+ vl_api_af_packet_delete_reply_t *rmp;
+ int rv = 0;
+ u8 *host_if_name = NULL;
+
+ host_if_name = format (0, "%s", mp->host_if_name);
+ vec_add1 (host_if_name, 0);
+
+ rv = af_packet_delete_if (host_if_name);
+
+ vec_free (host_if_name);
+
+ REPLY_MACRO (VL_API_AF_PACKET_DELETE_REPLY);
+}
+
+static void
+ vl_api_af_packet_set_l4_cksum_offload_t_handler
+ (vl_api_af_packet_set_l4_cksum_offload_t * mp)
+{
+ vl_api_af_packet_delete_reply_t *rmp;
+ int rv = 0;
+
+ rv = af_packet_set_l4_cksum_offload (ntohl (mp->sw_if_index), mp->set);
+ REPLY_MACRO (VL_API_AF_PACKET_SET_L4_CKSUM_OFFLOAD_REPLY);
+}
+
+static void
+af_packet_send_details (vpe_api_main_t * am,
+ vl_api_registration_t * reg,
+ af_packet_if_detail_t * af_packet_if, u32 context)
+{
+ vl_api_af_packet_details_t *mp;
+ mp = vl_msg_api_alloc (sizeof (*mp));
+ clib_memset (mp, 0, sizeof (*mp));
+ mp->_vl_msg_id = htons (REPLY_MSG_ID_BASE + VL_API_AF_PACKET_DETAILS);
+ mp->sw_if_index = htonl (af_packet_if->sw_if_index);
+ clib_memcpy (mp->host_if_name, af_packet_if->host_if_name,
+ MIN (ARRAY_LEN (mp->host_if_name) - 1,
+ strlen ((const char *) af_packet_if->host_if_name)));
+
+ mp->context = context;
+ vl_api_send_msg (reg, (u8 *) mp);
+}
+
+
+static void
+vl_api_af_packet_dump_t_handler (vl_api_af_packet_dump_t * mp)
+{
+ int rv;
+ vpe_api_main_t *am = &vpe_api_main;
+ vl_api_registration_t *reg;
+ af_packet_if_detail_t *out_af_packet_ifs = NULL;
+ af_packet_if_detail_t *af_packet_if = NULL;
+
+ reg = vl_api_client_index_to_registration (mp->client_index);
+ if (!reg)
+ return;
+
+ rv = af_packet_dump_ifs (&out_af_packet_ifs);
+ if (rv)
+ return;
+
+ vec_foreach (af_packet_if, out_af_packet_ifs)
+ {
+ af_packet_send_details (am, reg, af_packet_if, mp->context);
+ }
+
+ vec_free (out_af_packet_ifs);
+}
+
+#include <af_packet/af_packet.api.c>
+static clib_error_t *
+af_packet_api_hookup (vlib_main_t * vm)
+{
+ /*
+ * Set up the (msg_name, crc, message-id) table
+ */
+ REPLY_MSG_ID_BASE = setup_message_id_table ();
+
+ return 0;
+}
+
+VLIB_API_INIT_FUNCTION (af_packet_api_hookup);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/cli.c b/src/plugins/af_packet/cli.c
new file mode 100644
index 00000000000..6a8377540d8
--- /dev/null
+++ b/src/plugins/af_packet/cli.c
@@ -0,0 +1,295 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet.c - linux kernel packet interface
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <fcntl.h> /* for open */
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/uio.h> /* for iovec */
+#include <netinet/in.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <af_packet/af_packet.h>
+
+/**
+ * @file
+ * @brief CLI for Host Interface Device Driver.
+ *
+ * This file contains the source code for CLI for the host interface.
+ */
+
+static clib_error_t *
+af_packet_create_command_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ af_packet_create_if_arg_t _arg, *arg = &_arg;
+ clib_error_t *error = NULL;
+ u8 hwaddr[6];
+ int r;
+
+ clib_memset (arg, 0, sizeof (*arg));
+
+ // Default mode
+ arg->mode = AF_PACKET_IF_MODE_ETHERNET;
+
+ // Default number of rx/tx queue(s)
+ arg->num_rxqs = 1;
+ arg->num_txqs = 1;
+
+ // Default flags
+ arg->flags = AF_PACKET_IF_FLAGS_QDISC_BYPASS | AF_PACKET_IF_FLAGS_CKSUM_GSO;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "name %s", &arg->host_if_name))
+ ;
+ else if (unformat (line_input, "rx-size %u", &arg->rx_frame_size))
+ ;
+ else if (unformat (line_input, "tx-size %u", &arg->tx_frame_size))
+ ;
+ else if (unformat (line_input, "rx-per-block %u",
+ &arg->rx_frames_per_block))
+ ;
+ else if (unformat (line_input, "tx-per-block %u",
+ &arg->tx_frames_per_block))
+ ;
+ else if (unformat (line_input, "num-rx-queues %u", &arg->num_rxqs))
+ ;
+ else if (unformat (line_input, "num-tx-queues %u", &arg->num_txqs))
+ ;
+ else if (unformat (line_input, "qdisc-bypass-disable"))
+ arg->flags &= ~AF_PACKET_IF_FLAGS_QDISC_BYPASS;
+ else if (unformat (line_input, "cksum-gso-disable"))
+ arg->flags &= ~AF_PACKET_IF_FLAGS_CKSUM_GSO;
+ else if (unformat (line_input, "mode ip"))
+ arg->mode = AF_PACKET_IF_MODE_IP;
+ else if (unformat (line_input, "v2"))
+ arg->is_v2 = 1;
+ else if (unformat (line_input, "hw-addr %U", unformat_ethernet_address,
+ hwaddr))
+ arg->hw_addr = hwaddr;
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (arg->host_if_name == NULL)
+ {
+ error = clib_error_return (0, "missing host interface name");
+ goto done;
+ }
+
+ r = af_packet_create_if (arg);
+
+ if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
+ {
+ error = clib_error_return (0, "%s (errno %d)", strerror (errno), errno);
+ goto done;
+ }
+
+ if (r == VNET_API_ERROR_INVALID_INTERFACE)
+ {
+ error = clib_error_return (0, "Invalid interface name");
+ goto done;
+ }
+
+ if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
+ {
+ error = clib_error_return (0, "Interface already exists");
+ goto done;
+ }
+
+ vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
+ arg->sw_if_index);
+
+done:
+ vec_free (arg->host_if_name);
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * Create a host interface that will attach to a linux AF_PACKET
+ * interface, one side of a veth pair. The veth pair must already
+ * exist. Once created, a new host interface will exist in VPP
+ * with the name '<em>host-<ifname></em>', where '<em><ifname></em>'
+ * is the name of the specified veth pair. Use the
+ * '<em>show interface</em>' command to display host interface details.
+ *
+ * This command has the following optional parameters:
+ *
+ * - <b>hw-addr <mac-addr></b> - Optional ethernet address, can be in either
+ * X:X:X:X:X:X unix or X.X.X cisco format.
+ *
+ * @cliexpar
+ * Example of how to create a host interface tied to one side of an
+ * existing linux veth pair named vpp1:
+ * @cliexstart{create host-interface name vpp1}
+ * host-vpp1
+ * @cliexend
+ * Once the host interface is created, enable the interface using:
+ * @cliexcmd{set interface state host-vpp1 up}
+?*/
+VLIB_CLI_COMMAND (af_packet_create_command, static) = {
+ .path = "create host-interface",
+ .short_help = "create host-interface [v2] name <ifname> [num-rx-queues <n>] "
+ "[num-tx-queues <n>] [hw-addr <mac-addr>] [mode ip] "
+ "[qdisc-bypass-disable] [cksum-gso-disable]",
+ .function = af_packet_create_command_fn,
+};
+
+static clib_error_t *
+af_packet_delete_command_fn (vlib_main_t * vm, unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u8 *host_if_name = NULL;
+ clib_error_t *error = NULL;
+
+ /* Get a line of input. */
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "name %s", &host_if_name))
+ ;
+ else
+ {
+ error = clib_error_return (0, "unknown input `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (host_if_name == NULL)
+ {
+ error = clib_error_return (0, "missing host interface name");
+ goto done;
+ }
+
+ af_packet_delete_if (host_if_name);
+
+done:
+ vec_free (host_if_name);
+ unformat_free (line_input);
+
+ return error;
+}
+
+/*?
+ * Delete a host interface. Use the linux interface name to identify
+ * the host interface to be deleted. In VPP, host interfaces are
+ * named as '<em>host-<ifname></em>', where '<em><ifname></em>'
+ * is the name of the linux interface.
+ *
+ * @cliexpar
+ * Example of how to delete a host interface named host-vpp1:
+ * @cliexcmd{delete host-interface name vpp1}
+?*/
+VLIB_CLI_COMMAND (af_packet_delete_command, static) = {
+ .path = "delete host-interface",
+ .short_help = "delete host-interface name <ifname>",
+ .function = af_packet_delete_command_fn,
+};
+
+static clib_error_t *
+af_packet_set_l4_cksum_offload_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, *line_input = &_line_input;
+ u8 set = 0;
+ clib_error_t *error = NULL;
+ vnet_main_t *vnm = vnet_get_main ();
+ u32 sw_if_index;
+
+ if (!unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "%U", unformat_vnet_sw_interface, vnm,
+ &sw_if_index))
+ ;
+ else if (unformat (line_input, "on"))
+ set = 1;
+ else if (unformat (line_input, "off"))
+ set = 0;
+ else
+ {
+ error = clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ if (af_packet_set_l4_cksum_offload (sw_if_index, set) < 0)
+ error = clib_error_return (0, "not an af_packet interface");
+
+done:
+ unformat_free (line_input);
+ return error;
+}
+
+/*?
+ * Set TCP/UDP offload checksum calculation. Use interface
+ * name to identify the interface to set TCP/UDP offload checksum
+ * calculation.
+ *
+ * @cliexpar
+ * Example of how to set TCP/UDP offload checksum calculation on host-vpp0:
+ * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 off}
+ * @cliexcmd{set host-interface l4-cksum-offload host-vpp0 on}
+?*/
+VLIB_CLI_COMMAND (af_packet_set_l4_cksum_offload_command, static) = {
+ .path = "set host-interface l4-cksum-offload",
+ .short_help = "set host-interface l4-cksum-offload <host-if-name> <on|off>",
+ .function = af_packet_set_l4_cksum_offload_command_fn,
+};
+
+clib_error_t *
+af_packet_cli_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (af_packet_cli_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/device.c b/src/plugins/af_packet/device.c
new file mode 100644
index 00000000000..b38d58cced1
--- /dev/null
+++ b/src/plugins/af_packet/device.c
@@ -0,0 +1,836 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet.c - linux kernel packet interface
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <linux/if_packet.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <net/if_arp.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ip/ip_psh_cksum.h>
+#include <vnet/tcp/tcp_packet.h>
+#include <vnet/udp/udp_packet.h>
+
+#include <af_packet/af_packet.h>
+#include <vnet/devices/virtio/virtio_std.h>
+
+#define foreach_af_packet_tx_func_error \
+_(FRAME_NOT_READY, "tx frame not ready") \
+_(TXRING_EAGAIN, "tx sendto temporary failure") \
+_(TXRING_FATAL, "tx sendto fatal failure") \
+_(TXRING_OVERRUN, "tx ring overrun")
+
+typedef enum
+{
+#define _(f,s) AF_PACKET_TX_ERROR_##f,
+ foreach_af_packet_tx_func_error
+#undef _
+ AF_PACKET_TX_N_ERROR,
+} af_packet_tx_func_error_t;
+
+static char *af_packet_tx_func_error_strings[] = {
+#define _(n,s) s,
+ foreach_af_packet_tx_func_error
+#undef _
+};
+
+typedef struct
+{
+ u32 buffer_index;
+ u32 hw_if_index;
+ u16 queue_id;
+ u8 is_v2;
+ union
+ {
+ tpacket2_hdr_t tph2;
+ tpacket3_hdr_t tph3;
+ };
+ vnet_virtio_net_hdr_t vnet_hdr;
+ vlib_buffer_t buffer;
+} af_packet_tx_trace_t;
+
+#ifndef CLIB_MARCH_VARIANT
+u8 *
+format_af_packet_device_name (u8 * s, va_list * args)
+{
+ u32 i = va_arg (*args, u32);
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, i);
+
+ s = format (s, "host-%s", apif->host_if_name);
+ return s;
+}
+#endif /* CLIB_MARCH_VARIANT */
+
+static u8 *
+format_af_packet_device (u8 * s, va_list * args)
+{
+ u32 dev_instance = va_arg (*args, u32);
+ u32 indent = format_get_indent (s);
+ int __clib_unused verbose = va_arg (*args, int);
+
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_if_t *apif = pool_elt_at_index (apm->interfaces, dev_instance);
+ af_packet_queue_t *rx_queue = 0;
+ af_packet_queue_t *tx_queue = 0;
+
+ s = format (s, "Linux PACKET socket interface %s",
+ (apif->version == TPACKET_V2) ? "v2" : "v3");
+ s = format (s, "\n%UFEATURES:", format_white_space, indent);
+ if (apif->is_qdisc_bypass_enabled)
+ s = format (s, "\n%Uqdisc-bpass-enabled", format_white_space, indent + 2);
+ if (apif->is_cksum_gso_enabled)
+ s = format (s, "\n%Ucksum-gso-enabled", format_white_space, indent + 2);
+ if (apif->is_fanout_enabled)
+ s = format (s, "\n%Ufanout-enabled", format_white_space, indent + 2);
+
+ vec_foreach (rx_queue, apif->rx_queues)
+ {
+ u32 rx_block_size = rx_queue->rx_req->req.tp_block_size;
+ u32 rx_frame_size = rx_queue->rx_req->req.tp_frame_size;
+ u32 rx_frame_nr = rx_queue->rx_req->req.tp_frame_nr;
+ u32 rx_block_nr = rx_queue->rx_req->req.tp_block_nr;
+
+ s = format (s, "\n%URX Queue %u:", format_white_space, indent,
+ rx_queue->queue_id);
+ s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d",
+ format_white_space, indent + 2, rx_block_size, rx_block_nr,
+ rx_frame_size, rx_frame_nr);
+ if (apif->version == TPACKET_V2)
+ s = format (s, " next frame:%d", rx_queue->next_rx_frame);
+ else
+ s = format (s, " next block:%d", rx_queue->next_rx_block);
+ if (rx_queue->is_rx_pending)
+ {
+ s = format (
+ s, "\n%UPending Request: num-rx-pkts:%d next-frame-offset:%d",
+ format_white_space, indent + 2, rx_queue->num_rx_pkts,
+ rx_queue->rx_frame_offset);
+ }
+ }
+
+ vec_foreach (tx_queue, apif->tx_queues)
+ {
+ clib_spinlock_lock (&tx_queue->lockp);
+ u32 tx_block_sz = tx_queue->tx_req->req.tp_block_size;
+ u32 tx_frame_sz = tx_queue->tx_req->req.tp_frame_size;
+ u32 tx_frame_nr = tx_queue->tx_req->req.tp_frame_nr;
+ u32 tx_block_nr = tx_queue->tx_req->req.tp_block_nr;
+ int block = 0;
+ int n_send_req = 0, n_avail = 0, n_sending = 0, n_tot = 0, n_wrong = 0;
+ u8 *tx_block_start = tx_queue->tx_ring[block];
+ u32 tx_frame = tx_queue->next_tx_frame;
+ tpacket3_hdr_t *tph3;
+ tpacket2_hdr_t *tph2;
+
+ s = format (s, "\n%UTX Queue %u:", format_white_space, indent,
+ tx_queue->queue_id);
+ s = format (s, "\n%Ublock size:%d nr:%d frame size:%d nr:%d",
+ format_white_space, indent + 2, tx_block_sz, tx_block_nr,
+ tx_frame_sz, tx_frame_nr);
+ s = format (s, " next frame:%d", tx_queue->next_tx_frame);
+ if (apif->version & TPACKET_V3)
+ do
+ {
+ tph3 =
+ (tpacket3_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz);
+ tx_frame = (tx_frame + 1) % tx_frame_nr;
+ if (tph3->tp_status == 0)
+ n_avail++;
+ else if (tph3->tp_status & TP_STATUS_SEND_REQUEST)
+ n_send_req++;
+ else if (tph3->tp_status & TP_STATUS_SENDING)
+ n_sending++;
+ else
+ n_wrong++;
+ n_tot++;
+ }
+ while (tx_frame != tx_queue->next_tx_frame);
+ else
+ do
+ {
+ tph2 =
+ (tpacket2_hdr_t *) (tx_block_start + tx_frame * tx_frame_sz);
+ tx_frame = (tx_frame + 1) % tx_frame_nr;
+ if (tph2->tp_status == 0)
+ n_avail++;
+ else if (tph2->tp_status & TP_STATUS_SEND_REQUEST)
+ n_send_req++;
+ else if (tph2->tp_status & TP_STATUS_SENDING)
+ n_sending++;
+ else
+ n_wrong++;
+ n_tot++;
+ }
+ while (tx_frame != tx_queue->next_tx_frame);
+ s =
+ format (s, "\n%Uavailable:%d request:%d sending:%d wrong:%d total:%d",
+ format_white_space, indent + 2, n_avail, n_send_req, n_sending,
+ n_wrong, n_tot);
+ clib_spinlock_unlock (&tx_queue->lockp);
+ }
+ return s;
+}
+
+static u8 *
+format_af_packet_tx_trace (u8 *s, va_list *va)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ af_packet_tx_trace_t *t = va_arg (*va, af_packet_tx_trace_t *);
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "af_packet: hw_if_index %u tx-queue %u", t->hw_if_index,
+ t->queue_id);
+
+ if (t->is_v2)
+ {
+ s = format (
+ s,
+ "\n%Utpacket2_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
+ "\n%Usec 0x%x nsec 0x%x vlan %U"
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ " vlan_tpid %u"
+#endif
+ ,
+ format_white_space, indent + 2, format_white_space, indent + 4,
+ t->tph2.tp_status, t->tph2.tp_len, t->tph2.tp_snaplen, t->tph2.tp_mac,
+ t->tph2.tp_net, format_white_space, indent + 4, t->tph2.tp_sec,
+ t->tph2.tp_nsec, format_ethernet_vlan_tci, t->tph2.tp_vlan_tci
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ ,
+ t->tph2.tp_vlan_tpid
+#endif
+ );
+ }
+ else
+ {
+ s = format (
+ s,
+ "\n%Utpacket3_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
+ "\n%Usec 0x%x nsec 0x%x vlan %U"
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ " vlan_tpid %u"
+#endif
+ ,
+ format_white_space, indent + 2, format_white_space, indent + 4,
+ t->tph3.tp_status, t->tph3.tp_len, t->tph3.tp_snaplen, t->tph3.tp_mac,
+ t->tph3.tp_net, format_white_space, indent + 4, t->tph3.tp_sec,
+ t->tph3.tp_nsec, format_ethernet_vlan_tci, t->tph3.hv1.tp_vlan_tci
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ ,
+ t->tph3.hv1.tp_vlan_tpid
+#endif
+ );
+ }
+ s = format (s,
+ "\n%Uvnet-hdr:\n%Uflags 0x%02x gso_type 0x%02x hdr_len %u"
+ "\n%Ugso_size %u csum_start %u csum_offset %u",
+ format_white_space, indent + 2, format_white_space, indent + 4,
+ t->vnet_hdr.flags, t->vnet_hdr.gso_type, t->vnet_hdr.hdr_len,
+ format_white_space, indent + 4, t->vnet_hdr.gso_size,
+ t->vnet_hdr.csum_start, t->vnet_hdr.csum_offset);
+
+ s = format (s, "\n%Ubuffer 0x%x:\n%U%U", format_white_space, indent + 2,
+ t->buffer_index, format_white_space, indent + 4,
+ format_vnet_buffer_no_chain, &t->buffer);
+ s = format (s, "\n%U%U", format_white_space, indent + 2,
+ format_ethernet_header_with_length, t->buffer.pre_data,
+ sizeof (t->buffer.pre_data));
+ return s;
+}
+
+static void
+af_packet_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_buffer_t *b0, u32 bi, void *tph,
+ vnet_virtio_net_hdr_t *vnet_hdr, u32 hw_if_index,
+ u16 queue_id, u8 is_v2)
+{
+ af_packet_tx_trace_t *t;
+ t = vlib_add_trace (vm, node, b0, sizeof (t[0]));
+ t->hw_if_index = hw_if_index;
+ t->queue_id = queue_id;
+ t->buffer_index = bi;
+ t->is_v2 = is_v2;
+
+ if (is_v2)
+ clib_memcpy_fast (&t->tph2, (tpacket2_hdr_t *) tph,
+ sizeof (tpacket2_hdr_t));
+ else
+ clib_memcpy_fast (&t->tph3, (tpacket3_hdr_t *) tph,
+ sizeof (tpacket3_hdr_t));
+ clib_memcpy_fast (&t->vnet_hdr, vnet_hdr, sizeof (*vnet_hdr));
+ clib_memcpy_fast (&t->buffer, b0, sizeof (*b0) - sizeof (b0->pre_data));
+ clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0),
+ sizeof (t->buffer.pre_data));
+}
+
+static_always_inline void
+fill_gso_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr)
+{
+ vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
+ i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data;
+ if (b0->flags & VNET_BUFFER_F_IS_IP4)
+ {
+ ip4_header_t *ip4;
+ vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
+ vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size;
+ vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz;
+ vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ vnet_hdr->csum_start = l4_hdr_offset; // 0x22;
+ vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
+ if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
+ ip4->checksum = ip4_header_checksum (ip4);
+ tcp_header_t *tcp =
+ (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
+ tcp->checksum = ip4_pseudo_header_cksum (ip4);
+ }
+ else if (b0->flags & VNET_BUFFER_F_IS_IP6)
+ {
+ ip6_header_t *ip6;
+ vnet_hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+ vnet_hdr->gso_size = vnet_buffer2 (b0)->gso_size;
+ vnet_hdr->hdr_len = l4_hdr_offset + vnet_buffer2 (b0)->gso_l4_hdr_sz;
+ vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ vnet_hdr->csum_start = l4_hdr_offset; // 0x36;
+ vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
+ tcp_header_t *tcp =
+ (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
+ tcp->checksum = ip6_pseudo_header_cksum (ip6);
+ }
+}
+
+static_always_inline void
+fill_cksum_offload (vlib_buffer_t *b0, vnet_virtio_net_hdr_t *vnet_hdr)
+{
+ vnet_buffer_oflags_t oflags = vnet_buffer (b0)->oflags;
+ i16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset - b0->current_data;
+ if (b0->flags & VNET_BUFFER_F_IS_IP4)
+ {
+ ip4_header_t *ip4;
+ ip4 = (ip4_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
+ if (oflags & VNET_BUFFER_OFFLOAD_F_IP_CKSUM)
+ ip4->checksum = ip4_header_checksum (ip4);
+ vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ vnet_hdr->csum_start = l4_hdr_offset;
+ if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
+ {
+ tcp_header_t *tcp =
+ (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
+ tcp->checksum = ip4_pseudo_header_cksum (ip4);
+ vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ }
+ else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
+ {
+ udp_header_t *udp =
+ (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
+ udp->checksum = ip4_pseudo_header_cksum (ip4);
+ vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+ }
+ }
+ else if (b0->flags & VNET_BUFFER_F_IS_IP6)
+ {
+ ip6_header_t *ip6;
+ vnet_hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ vnet_hdr->csum_start = l4_hdr_offset;
+ ip6 = (ip6_header_t *) (b0->data + vnet_buffer (b0)->l3_hdr_offset);
+ if (oflags & VNET_BUFFER_OFFLOAD_F_TCP_CKSUM)
+ {
+ tcp_header_t *tcp =
+ (tcp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
+ tcp->checksum = ip6_pseudo_header_cksum (ip6);
+ vnet_hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ }
+ else if (oflags & VNET_BUFFER_OFFLOAD_F_UDP_CKSUM)
+ {
+ udp_header_t *udp =
+ (udp_header_t *) (b0->data + vnet_buffer (b0)->l4_hdr_offset);
+ udp->checksum = ip6_pseudo_header_cksum (ip6);
+ vnet_hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+ }
+ }
+}
+
+VNET_DEVICE_CLASS_TX_FN (af_packet_device_class) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame);
+ u32 *buffers = vlib_frame_vector_args (frame);
+ u32 n_left = frame->n_vectors;
+ u32 n_sent = 0;
+ vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+ af_packet_if_t *apif =
+ pool_elt_at_index (apm->interfaces, rd->dev_instance);
+ u16 queue_id = tf->queue_id;
+ af_packet_queue_t *tx_queue = vec_elt_at_index (apif->tx_queues, queue_id);
+ u32 block = 0, frame_size = 0, frame_num = 0, tx_frame = 0;
+ u8 *block_start = 0;
+ tpacket3_hdr_t *tph3 = 0;
+ tpacket2_hdr_t *tph2 = 0;
+ u32 frame_not_ready = 0;
+ u8 is_cksum_gso_enabled = (apif->is_cksum_gso_enabled == 1) ? 1 : 0;
+ u32 tpacket_align = 0;
+ u8 is_v2 = (apif->version == TPACKET_V2) ? 1 : 0;
+
+ if (tf->shared_queue)
+ clib_spinlock_lock (&tx_queue->lockp);
+
+ frame_size = tx_queue->tx_req->req.tp_frame_size;
+ frame_num = tx_queue->tx_req->req.tp_frame_nr;
+ block_start = tx_queue->tx_ring[block];
+ tx_frame = tx_queue->next_tx_frame;
+ if (is_v2)
+ {
+ tpacket_align = TPACKET_ALIGN (sizeof (tpacket2_hdr_t));
+ while (n_left)
+ {
+ u32 len;
+ vnet_virtio_net_hdr_t *vnet_hdr = 0;
+ u32 offset = 0;
+ vlib_buffer_t *b0 = 0, *b0_first = 0;
+ u32 bi, bi_first;
+
+ bi = bi_first = buffers[0];
+ n_left--;
+ buffers++;
+
+ tph2 = (tpacket2_hdr_t *) (block_start + tx_frame * frame_size);
+ if (PREDICT_FALSE (tph2->tp_status &
+ (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
+ {
+ frame_not_ready++;
+ goto nextv2;
+ }
+
+ b0_first = b0 = vlib_get_buffer (vm, bi);
+
+ if (PREDICT_TRUE (is_cksum_gso_enabled))
+ {
+ vnet_hdr =
+ (vnet_virtio_net_hdr_t *) ((u8 *) tph2 + tpacket_align);
+
+ clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t));
+ offset = sizeof (vnet_virtio_net_hdr_t);
+
+ if (b0->flags & VNET_BUFFER_F_GSO)
+ fill_gso_offload (b0, vnet_hdr);
+ else if (b0->flags & VNET_BUFFER_F_OFFLOAD)
+ fill_cksum_offload (b0, vnet_hdr);
+ }
+
+ len = b0->current_length;
+ clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset,
+ vlib_buffer_get_current (b0), len);
+ offset += len;
+
+ while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ b0 = vlib_get_buffer (vm, b0->next_buffer);
+ len = b0->current_length;
+ clib_memcpy_fast ((u8 *) tph2 + tpacket_align + offset,
+ vlib_buffer_get_current (b0), len);
+ offset += len;
+ }
+
+ tph2->tp_len = tph2->tp_snaplen = offset;
+ tph2->tp_status = TP_STATUS_SEND_REQUEST;
+ n_sent++;
+
+ if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ if (PREDICT_TRUE (is_cksum_gso_enabled))
+ af_packet_tx_trace (vm, node, b0_first, bi_first, tph2,
+ vnet_hdr, apif->hw_if_index, queue_id, 1);
+ else
+ {
+ vnet_virtio_net_hdr_t vnet_hdr2 = {};
+ af_packet_tx_trace (vm, node, b0_first, bi_first, tph2,
+ &vnet_hdr2, apif->hw_if_index, queue_id,
+ 1);
+ }
+ }
+ tx_frame = (tx_frame + 1) % frame_num;
+
+ nextv2:
+ /* check if we've exhausted the ring */
+ if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
+ break;
+ }
+ }
+ else
+ {
+ tpacket_align = TPACKET_ALIGN (sizeof (tpacket3_hdr_t));
+
+ while (n_left)
+ {
+ u32 len;
+ vnet_virtio_net_hdr_t *vnet_hdr = 0;
+ u32 offset = 0;
+ vlib_buffer_t *b0 = 0, *b0_first = 0;
+ u32 bi, bi_first;
+
+ bi = bi_first = buffers[0];
+ n_left--;
+ buffers++;
+
+ tph3 = (tpacket3_hdr_t *) (block_start + tx_frame * frame_size);
+ if (PREDICT_FALSE (tph3->tp_status &
+ (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING)))
+ {
+ frame_not_ready++;
+ goto nextv3;
+ }
+
+ b0_first = b0 = vlib_get_buffer (vm, bi);
+
+ if (PREDICT_TRUE (is_cksum_gso_enabled))
+ {
+ vnet_hdr =
+ (vnet_virtio_net_hdr_t *) ((u8 *) tph3 + tpacket_align);
+
+ clib_memset_u8 (vnet_hdr, 0, sizeof (vnet_virtio_net_hdr_t));
+ offset = sizeof (vnet_virtio_net_hdr_t);
+
+ if (b0->flags & VNET_BUFFER_F_GSO)
+ fill_gso_offload (b0, vnet_hdr);
+ else if (b0->flags & VNET_BUFFER_F_OFFLOAD)
+ fill_cksum_offload (b0, vnet_hdr);
+ }
+
+ len = b0->current_length;
+ clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset,
+ vlib_buffer_get_current (b0), len);
+ offset += len;
+
+ while (b0->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ b0 = vlib_get_buffer (vm, b0->next_buffer);
+ len = b0->current_length;
+ clib_memcpy_fast ((u8 *) tph3 + tpacket_align + offset,
+ vlib_buffer_get_current (b0), len);
+ offset += len;
+ }
+
+ tph3->tp_len = tph3->tp_snaplen = offset;
+ tph3->tp_status = TP_STATUS_SEND_REQUEST;
+ n_sent++;
+
+ if (PREDICT_FALSE (b0_first->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ if (PREDICT_TRUE (is_cksum_gso_enabled))
+ af_packet_tx_trace (vm, node, b0_first, bi_first, tph3,
+ vnet_hdr, apif->hw_if_index, queue_id, 0);
+ else
+ {
+ vnet_virtio_net_hdr_t vnet_hdr2 = {};
+ af_packet_tx_trace (vm, node, b0_first, bi_first, tph3,
+ &vnet_hdr2, apif->hw_if_index, queue_id,
+ 0);
+ }
+ }
+ tx_frame = (tx_frame + 1) % frame_num;
+
+ nextv3:
+ /* check if we've exhausted the ring */
+ if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
+ break;
+ }
+ }
+ CLIB_MEMORY_BARRIER ();
+
+ if (PREDICT_TRUE (n_sent || tx_queue->is_tx_pending))
+ {
+ tx_queue->next_tx_frame = tx_frame;
+ tx_queue->is_tx_pending = 0;
+
+ if (PREDICT_FALSE (
+ sendto (tx_queue->fd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1))
+ {
+ /* Uh-oh, drop & move on, but count whether it was fatal or not.
+ * Note that we have no reliable way to properly determine the
+ * disposition of the packets we just enqueued for delivery.
+ */
+ uword counter;
+
+ if (unix_error_is_fatal (errno))
+ {
+ counter = AF_PACKET_TX_ERROR_TXRING_FATAL;
+ }
+ else
+ {
+ counter = AF_PACKET_TX_ERROR_TXRING_EAGAIN;
+ /* non-fatal error: kick again next time
+ * note that you could still end up in a deadlock: if you do not
+ * try to send new packets (ie reschedule this tx node), eg.
+ * because your peer is waiting for the unsent packets to reply
+ * to you but your waiting for its reply etc., you are not going
+ * to kick again, and everybody is waiting for the other to talk
+ * 1st... */
+ tx_queue->is_tx_pending = 1;
+ }
+
+ vlib_error_count (vm, node->node_index, counter, 1);
+ }
+ }
+
+ if (tf->shared_queue)
+ clib_spinlock_unlock (&tx_queue->lockp);
+
+ if (PREDICT_FALSE (frame_not_ready))
+ vlib_error_count (vm, node->node_index,
+ AF_PACKET_TX_ERROR_FRAME_NOT_READY, frame_not_ready);
+
+ if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
+ vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_TXRING_OVERRUN,
+ n_left);
+
+ vlib_buffer_free (vm, vlib_frame_vector_args (frame), frame->n_vectors);
+ return frame->n_vectors;
+}
+
+static void
+af_packet_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
+ u32 node_index)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ af_packet_if_t *apif =
+ pool_elt_at_index (apm->interfaces, hw->dev_instance);
+
+ /* Shut off redirection */
+ if (node_index == ~0)
+ {
+ apif->per_interface_next_index = node_index;
+ return;
+ }
+
+ apif->per_interface_next_index =
+ vlib_node_add_next (vlib_get_main (), af_packet_input_node.index,
+ node_index);
+}
+
+static void
+af_packet_clear_hw_interface_counters (u32 instance)
+{
+ /* Nothing for now */
+}
+
+static clib_error_t *
+af_packet_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index,
+ u32 flags)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ af_packet_if_t *apif =
+ pool_elt_at_index (apm->interfaces, hw->dev_instance);
+ u32 hw_flags;
+ int rv, fd = socket (AF_UNIX, SOCK_DGRAM, 0);
+ struct ifreq ifr;
+
+ if (0 > fd)
+ {
+ vlib_log_warn (apm->log_class, "af_packet_%s could not open socket",
+ apif->host_if_name);
+ return 0;
+ }
+
+ /* if interface is a bridge ignore */
+ if (apif->host_if_index < 0)
+ goto error; /* no error */
+
+ /* use host_if_index in case host name has changed */
+ ifr.ifr_ifindex = apif->host_if_index;
+ if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0)
+ {
+ vlib_log_warn (apm->log_class,
+ "af_packet_%s ioctl could not retrieve eth name",
+ apif->host_if_name);
+ goto error;
+ }
+
+ apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+ if ((rv = ioctl (fd, SIOCGIFFLAGS, &ifr)) < 0)
+ {
+ vlib_log_warn (apm->log_class, "af_packet_%s error: %d",
+ apif->is_admin_up ? "up" : "down", rv);
+ goto error;
+ }
+
+ if (apif->is_admin_up)
+ {
+ hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
+ ifr.ifr_flags |= IFF_UP;
+ }
+ else
+ {
+ hw_flags = 0;
+ ifr.ifr_flags &= ~IFF_UP;
+ }
+
+ if ((rv = ioctl (fd, SIOCSIFFLAGS, &ifr)) < 0)
+ {
+ vlib_log_warn (apm->log_class, "af_packet_%s error: %d",
+ apif->is_admin_up ? "up" : "down", rv);
+ goto error;
+ }
+
+ vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+
+error:
+ if (0 <= fd)
+ close (fd);
+
+ return 0; /* no error */
+}
+
+static clib_error_t *
+af_packet_subif_add_del_function (vnet_main_t * vnm,
+ u32 hw_if_index,
+ struct vnet_sw_interface_t *st, int is_add)
+{
+ /* Nothing for now */
+ return 0;
+}
+
+static clib_error_t *af_packet_set_mac_address_function
+ (struct vnet_hw_interface_t *hi, const u8 * old_address, const u8 * address)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_if_t *apif =
+ pool_elt_at_index (apm->interfaces, hi->dev_instance);
+ int rv, fd;
+ struct ifreq ifr;
+
+ if (apif->mode == AF_PACKET_IF_MODE_IP)
+ {
+ vlib_log_warn (apm->log_class, "af_packet_%s interface is in IP mode",
+ apif->host_if_name);
+ return clib_error_return (0,
+ " MAC update failed, interface is in IP mode");
+ }
+
+ fd = socket (AF_UNIX, SOCK_DGRAM, 0);
+ if (0 > fd)
+ {
+ vlib_log_warn (apm->log_class, "af_packet_%s could not open socket",
+ apif->host_if_name);
+ return 0;
+ }
+
+ /* if interface is a bridge ignore */
+ if (apif->host_if_index < 0)
+ goto error; /* no error */
+
+ /* use host_if_index in case host name has changed */
+ ifr.ifr_ifindex = apif->host_if_index;
+ if ((rv = ioctl (fd, SIOCGIFNAME, &ifr)) < 0)
+ {
+ vlib_log_warn
+ (apm->log_class,
+ "af_packet_%s ioctl could not retrieve eth name, error: %d",
+ apif->host_if_name, rv);
+ goto error;
+ }
+
+ clib_memcpy (ifr.ifr_hwaddr.sa_data, address, 6);
+ ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
+
+ if ((rv = ioctl (fd, SIOCSIFHWADDR, &ifr)) < 0)
+ {
+ vlib_log_warn (apm->log_class,
+ "af_packet_%s ioctl could not set mac, error: %d",
+ apif->host_if_name, rv);
+ goto error;
+ }
+
+error:
+
+ if (0 <= fd)
+ close (fd);
+
+ return 0; /* no error */
+}
+
+static clib_error_t *
+af_packet_interface_rx_mode_change (vnet_main_t *vnm, u32 hw_if_index, u32 qid,
+ vnet_hw_if_rx_mode mode)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ af_packet_if_t *apif;
+
+ apif = vec_elt_at_index (apm->interfaces, hw->dev_instance);
+
+ if (mode == VNET_HW_IF_RX_MODE_ADAPTIVE)
+ {
+ vlib_log_err (apm->log_class,
+ "af_packet_%s adaptive mode is not supported",
+ apif->host_if_name);
+ return clib_error_return (
+ 0, "af_packet_%s adaptive mode is not supported", apif->host_if_name);
+ }
+
+ af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, qid);
+
+ if (rx_queue->mode != mode)
+ {
+ rx_queue->mode = mode;
+
+ if (mode == VNET_HW_IF_RX_MODE_POLLING)
+ apm->polling_count++;
+ else if (mode == VNET_HW_IF_RX_MODE_INTERRUPT && apm->polling_count > 0)
+ apm->polling_count--;
+ }
+
+ return 0;
+}
+
+VNET_DEVICE_CLASS (af_packet_device_class) = {
+ .name = "af-packet",
+ .format_device_name = format_af_packet_device_name,
+ .format_device = format_af_packet_device,
+ .format_tx_trace = format_af_packet_tx_trace,
+ .tx_function_n_errors = AF_PACKET_TX_N_ERROR,
+ .tx_function_error_strings = af_packet_tx_func_error_strings,
+ .rx_redirect_to_node = af_packet_set_interface_next_node,
+ .clear_counters = af_packet_clear_hw_interface_counters,
+ .admin_up_down_function = af_packet_interface_admin_up_down,
+ .subif_add_del_function = af_packet_subif_add_del_function,
+ .mac_addr_change_function = af_packet_set_mac_address_function,
+ .rx_mode_change_function = af_packet_interface_rx_mode_change,
+};
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/dir.dox b/src/plugins/af_packet/dir.dox
new file mode 100644
index 00000000000..78991c6d97f
--- /dev/null
+++ b/src/plugins/af_packet/dir.dox
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Doxygen directory documentation */
+
+/**
+@dir
+@brief Host Interface Implementation.
+
+This directory contains the source code for Host Interface driver. The
+Host Interface driver leverages the DPDK AF_PACKET driver.
+
+
+*/
+/*? %%clicmd:group_label Host Interface %% ?*/
+/*? %%syscfg:group_label Host Interface %% ?*/
diff --git a/src/plugins/af_packet/node.c b/src/plugins/af_packet/node.c
new file mode 100644
index 00000000000..0ea4b3dfea7
--- /dev/null
+++ b/src/plugins/af_packet/node.c
@@ -0,0 +1,845 @@
+/*
+ *------------------------------------------------------------------
+ * af_packet.c - linux kernel packet interface
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *------------------------------------------------------------------
+ */
+
+#include <linux/if_packet.h>
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/interface/rx_queue_funcs.h>
+#include <vnet/feature/feature.h>
+#include <vnet/ethernet/packet.h>
+
+#include <af_packet/af_packet.h>
+#include <vnet/devices/virtio/virtio_std.h>
+
+#define foreach_af_packet_input_error \
+ _ (PARTIAL_PKT, "partial packet") \
+ _ (TIMEDOUT_BLK, "timed out block") \
+ _ (TOTAL_RECV_BLK, "total received block")
+typedef enum
+{
+#define _(f,s) AF_PACKET_INPUT_ERROR_##f,
+ foreach_af_packet_input_error
+#undef _
+ AF_PACKET_INPUT_N_ERROR,
+} af_packet_input_error_t;
+
+static char *af_packet_input_error_strings[] = {
+#define _(n,s) s,
+ foreach_af_packet_input_error
+#undef _
+};
+
+typedef struct
+{
+ u32 next_index;
+ u32 hw_if_index;
+ u16 queue_id;
+ int block;
+ u32 pkt_num;
+ void *block_start;
+ block_desc_t bd;
+ union
+ {
+ tpacket3_hdr_t tph3;
+ tpacket2_hdr_t tph2;
+ };
+ vnet_virtio_net_hdr_t vnet_hdr;
+ u8 is_v3;
+} af_packet_input_trace_t;
+
+static u8 *
+format_af_packet_input_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ af_packet_input_trace_t *t = va_arg (*args, af_packet_input_trace_t *);
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "af_packet: hw_if_index %d rx-queue %u next-index %d",
+ t->hw_if_index, t->queue_id, t->next_index);
+
+ if (t->is_v3)
+ {
+ s = format (
+ s, "\n%Ublock %u:\n%Uaddress %p version %u seq_num %lu pkt_num %u",
+ format_white_space, indent + 2, t->block, format_white_space,
+ indent + 4, t->block_start, t->bd.version, t->bd.hdr.bh1.seq_num,
+ t->pkt_num);
+ s = format (
+ s,
+ "\n%Utpacket3_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
+ "\n%Usec 0x%x nsec 0x%x vlan %U"
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ " vlan_tpid %u"
+#endif
+ ,
+ format_white_space, indent + 2, format_white_space, indent + 4,
+ t->tph3.tp_status, t->tph3.tp_len, t->tph3.tp_snaplen, t->tph3.tp_mac,
+ t->tph3.tp_net, format_white_space, indent + 4, t->tph3.tp_sec,
+ t->tph3.tp_nsec, format_ethernet_vlan_tci, t->tph3.hv1.tp_vlan_tci
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ ,
+ t->tph3.hv1.tp_vlan_tpid
+#endif
+ );
+ }
+ else
+ {
+ s = format (
+ s,
+ "\n%Utpacket2_hdr:\n%Ustatus 0x%x len %u snaplen %u mac %u net %u"
+ "\n%Usec 0x%x nsec 0x%x vlan %U"
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ " vlan_tpid %u"
+#endif
+ ,
+ format_white_space, indent + 2, format_white_space, indent + 4,
+ t->tph2.tp_status, t->tph2.tp_len, t->tph2.tp_snaplen, t->tph2.tp_mac,
+ t->tph2.tp_net, format_white_space, indent + 4, t->tph2.tp_sec,
+ t->tph2.tp_nsec, format_ethernet_vlan_tci, t->tph2.tp_vlan_tci
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ ,
+ t->tph2.tp_vlan_tpid
+#endif
+ );
+ }
+
+ s = format (s,
+ "\n%Uvnet-hdr:\n%Uflags 0x%02x gso_type 0x%02x hdr_len %u"
+ "\n%Ugso_size %u csum_start %u csum_offset %u",
+ format_white_space, indent + 2, format_white_space, indent + 4,
+ t->vnet_hdr.flags, t->vnet_hdr.gso_type, t->vnet_hdr.hdr_len,
+ format_white_space, indent + 4, t->vnet_hdr.gso_size,
+ t->vnet_hdr.csum_start, t->vnet_hdr.csum_offset);
+ return s;
+}
+
+always_inline void
+buffer_add_to_chain (vlib_buffer_t *b, vlib_buffer_t *first_b,
+ vlib_buffer_t *prev_b, u32 bi)
+{
+ /* update first buffer */
+ first_b->total_length_not_including_first_buffer += b->current_length;
+
+ /* update previous buffer */
+ prev_b->next_buffer = bi;
+ prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
+
+ /* update current buffer */
+ b->next_buffer = ~0;
+}
+
+static_always_inline void
+fill_gso_offload (vlib_buffer_t *b, u32 gso_size, u8 l4_hdr_sz)
+{
+ b->flags |= VNET_BUFFER_F_GSO;
+ vnet_buffer2 (b)->gso_size = gso_size;
+ vnet_buffer2 (b)->gso_l4_hdr_sz = l4_hdr_sz;
+}
+
+static_always_inline void
+fill_cksum_offload (vlib_buffer_t *b, u8 *l4_hdr_sz, u8 is_ip)
+{
+ vnet_buffer_oflags_t oflags = 0;
+ u16 l2hdr_sz = 0;
+ u16 ethertype = 0;
+ u8 l4_proto = 0;
+
+ if (is_ip)
+ {
+ switch (b->data[0] & 0xf0)
+ {
+ case 0x40:
+ ethertype = ETHERNET_TYPE_IP4;
+ break;
+ case 0x60:
+ ethertype = ETHERNET_TYPE_IP6;
+ break;
+ }
+ }
+ else
+ {
+ ethernet_header_t *eth = (ethernet_header_t *) b->data;
+ ethertype = clib_net_to_host_u16 (eth->type);
+ l2hdr_sz = sizeof (ethernet_header_t);
+ if (ethernet_frame_is_tagged (ethertype))
+ {
+ ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eth + 1);
+
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ if (ethertype == ETHERNET_TYPE_VLAN)
+ {
+ vlan++;
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ }
+ }
+ }
+
+ vnet_buffer (b)->l2_hdr_offset = 0;
+ vnet_buffer (b)->l3_hdr_offset = l2hdr_sz;
+
+ if (ethertype == ETHERNET_TYPE_IP4)
+ {
+ ip4_header_t *ip4 = (ip4_header_t *) (b->data + l2hdr_sz);
+ vnet_buffer (b)->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
+ b->flags |= (VNET_BUFFER_F_IS_IP4 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+
+ l4_proto = ip4->protocol;
+ }
+ else if (ethertype == ETHERNET_TYPE_IP6)
+ {
+ ip6_header_t *ip6 = (ip6_header_t *) (b->data + l2hdr_sz);
+ b->flags |= (VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L2_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L3_HDR_OFFSET_VALID |
+ VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
+ u16 ip6_hdr_len = sizeof (ip6_header_t);
+
+ if (ip6_ext_hdr (ip6->protocol))
+ {
+ ip6_ext_header_t *p = (void *) (ip6 + 1);
+ ip6_hdr_len += ip6_ext_header_len (p);
+ while (ip6_ext_hdr (p->next_hdr))
+ {
+ ip6_hdr_len += ip6_ext_header_len (p);
+ p = ip6_ext_next_header (p);
+ }
+ l4_proto = p->next_hdr;
+ }
+ else
+ l4_proto = ip6->protocol;
+ vnet_buffer (b)->l4_hdr_offset = l2hdr_sz + ip6_hdr_len;
+ }
+
+ if (l4_proto == IP_PROTOCOL_TCP)
+ {
+ oflags |= VNET_BUFFER_OFFLOAD_F_TCP_CKSUM;
+ tcp_header_t *tcp =
+ (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
+ *l4_hdr_sz = tcp_header_bytes (tcp);
+ }
+ else if (l4_proto == IP_PROTOCOL_UDP)
+ {
+ oflags |= VNET_BUFFER_OFFLOAD_F_UDP_CKSUM;
+ *l4_hdr_sz = sizeof (udp_header_t);
+ }
+
+ if (oflags)
+ vnet_buffer_offload_flags_set (b, oflags);
+}
+
+always_inline uword
+af_packet_v3_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, af_packet_if_t *apif,
+ u16 queue_id, u8 is_cksum_gso_enabled)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, queue_id);
+ tpacket3_hdr_t *tph;
+ u32 next_index;
+ u32 n_free_bufs;
+ u32 n_rx_packets = 0;
+ u32 n_rx_bytes = 0;
+ u32 timedout_blk = 0;
+ u32 total = 0;
+ u32 *to_next = 0;
+ u32 block = rx_queue->next_rx_block;
+ u32 block_nr = rx_queue->rx_req->req3.tp_block_nr;
+ u8 *block_start = 0;
+ uword n_trace = vlib_get_trace_count (vm, node);
+ u32 thread_index = vm->thread_index;
+ u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
+ u32 min_bufs = rx_queue->rx_req->req3.tp_frame_size / n_buffer_bytes;
+ u32 num_pkts = 0;
+ u32 rx_frame_offset = 0;
+ block_desc_t *bd = 0;
+ vlib_buffer_t bt = {};
+ u8 is_ip = (apif->mode == AF_PACKET_IF_MODE_IP);
+
+ if (is_ip)
+ next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ else
+ {
+ next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
+ next_index = apif->per_interface_next_index;
+
+ /* redirect if feature path enabled */
+ vnet_feature_start_device_input_x1 (apif->sw_if_index, &next_index, &bt);
+ }
+
+ if ((((block_desc_t *) (block_start = rx_queue->rx_ring[block]))
+ ->hdr.bh1.block_status &
+ TP_STATUS_USER) != 0)
+ {
+ u32 n_required = 0;
+ bd = (block_desc_t *) block_start;
+
+ if (PREDICT_FALSE (rx_queue->is_rx_pending))
+ {
+ num_pkts = rx_queue->num_rx_pkts;
+ rx_frame_offset = rx_queue->rx_frame_offset;
+ rx_queue->is_rx_pending = 0;
+ }
+ else
+ {
+ num_pkts = bd->hdr.bh1.num_pkts;
+ rx_frame_offset = sizeof (block_desc_t);
+ total++;
+
+ if (TP_STATUS_BLK_TMO & bd->hdr.bh1.block_status)
+ timedout_blk++;
+ }
+
+ n_required = clib_max (num_pkts, VLIB_FRAME_SIZE);
+ n_free_bufs = vec_len (apm->rx_buffers[thread_index]);
+ if (PREDICT_FALSE (n_free_bufs < n_required))
+ {
+ vec_validate (apm->rx_buffers[thread_index],
+ n_required + n_free_bufs - 1);
+ n_free_bufs += vlib_buffer_alloc (
+ vm, &apm->rx_buffers[thread_index][n_free_bufs], n_required);
+ vec_set_len (apm->rx_buffers[thread_index], n_free_bufs);
+ }
+
+ while (num_pkts && (n_free_bufs >= min_bufs))
+ {
+ u32 next0 = next_index;
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (num_pkts && n_left_to_next && (n_free_bufs >= min_bufs))
+ {
+ tph = (tpacket3_hdr_t *) (block_start + rx_frame_offset);
+
+ if (num_pkts > 1)
+ CLIB_PREFETCH (block_start + rx_frame_offset +
+ tph->tp_next_offset,
+ 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+
+ vlib_buffer_t *b0 = 0, *first_b0 = 0, *prev_b0 = 0;
+ vnet_virtio_net_hdr_t *vnet_hdr = 0;
+ u32 data_len = tph->tp_snaplen;
+ u32 offset = 0;
+ u32 bi0 = ~0, first_bi0 = ~0;
+ u8 l4_hdr_sz = 0;
+
+ if (is_cksum_gso_enabled)
+ vnet_hdr =
+ (vnet_virtio_net_hdr_t *) ((u8 *) tph + tph->tp_mac -
+ sizeof (vnet_virtio_net_hdr_t));
+
+ // save current state and return
+ if (PREDICT_FALSE (((data_len / n_buffer_bytes) + 1) >
+ vec_len (apm->rx_buffers[thread_index])))
+ {
+ rx_queue->rx_frame_offset = rx_frame_offset;
+ rx_queue->num_rx_pkts = num_pkts;
+ rx_queue->is_rx_pending = 1;
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ goto done;
+ }
+
+ while (data_len)
+ {
+ /* grab free buffer */
+ u32 last_empty_buffer =
+ vec_len (apm->rx_buffers[thread_index]) - 1;
+ bi0 = apm->rx_buffers[thread_index][last_empty_buffer];
+ vec_set_len (apm->rx_buffers[thread_index],
+ last_empty_buffer);
+ n_free_bufs--;
+
+ /* copy data */
+ u32 bytes_to_copy =
+ data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
+ u32 vlan_len = 0;
+ u32 bytes_copied = 0;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b0->current_data = 0;
+
+ /* Kernel removes VLAN headers, so reconstruct VLAN */
+ if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID))
+ {
+ if (PREDICT_TRUE (offset == 0))
+ {
+ clib_memcpy_fast (vlib_buffer_get_current (b0),
+ (u8 *) tph + tph->tp_mac,
+ sizeof (ethernet_header_t));
+ ethernet_header_t *eth =
+ vlib_buffer_get_current (b0);
+ ethernet_vlan_header_t *vlan =
+ (ethernet_vlan_header_t *) (eth + 1);
+ vlan->priority_cfi_and_id =
+ clib_host_to_net_u16 (tph->hv1.tp_vlan_tci);
+ vlan->type = eth->type;
+ eth->type =
+ clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
+ vlan_len = sizeof (ethernet_vlan_header_t);
+ bytes_copied = sizeof (ethernet_header_t);
+ }
+ }
+ clib_memcpy_fast (((u8 *) vlib_buffer_get_current (b0)) +
+ bytes_copied + vlan_len,
+ (u8 *) tph + tph->tp_mac + offset +
+ bytes_copied,
+ (bytes_to_copy - bytes_copied));
+
+ /* fill buffer header */
+ b0->current_length = bytes_to_copy + vlan_len;
+
+ if (offset == 0)
+ {
+ b0->total_length_not_including_first_buffer = 0;
+ b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+ apif->sw_if_index;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~0;
+ first_b0 = b0;
+ first_bi0 = bi0;
+ if (is_cksum_gso_enabled)
+ {
+ if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
+ fill_cksum_offload (first_b0, &l4_hdr_sz, is_ip);
+ if (vnet_hdr->gso_type & (VIRTIO_NET_HDR_GSO_TCPV4 |
+ VIRTIO_NET_HDR_GSO_TCPV6))
+ fill_gso_offload (first_b0, vnet_hdr->gso_size,
+ l4_hdr_sz);
+ }
+ }
+ else
+ buffer_add_to_chain (b0, first_b0, prev_b0, bi0);
+
+ prev_b0 = b0;
+ offset += bytes_to_copy;
+ data_len -= bytes_to_copy;
+ }
+ n_rx_packets++;
+ n_rx_bytes += tph->tp_snaplen;
+ to_next[0] = first_bi0;
+ to_next += 1;
+ n_left_to_next--;
+
+ /* drop partial packets */
+ if (PREDICT_FALSE (tph->tp_len != tph->tp_snaplen))
+ {
+ next0 = VNET_DEVICE_INPUT_NEXT_DROP;
+ first_b0->error =
+ node->errors[AF_PACKET_INPUT_ERROR_PARTIAL_PKT];
+ }
+ else
+ {
+ if (PREDICT_FALSE (apif->mode == AF_PACKET_IF_MODE_IP))
+ {
+ switch (first_b0->data[0] & 0xf0)
+ {
+ case 0x40:
+ next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ break;
+ case 0x60:
+ next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
+ break;
+ default:
+ next0 = VNET_DEVICE_INPUT_NEXT_DROP;
+ break;
+ }
+ if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
+ next0 = apif->per_interface_next_index;
+ }
+ else
+ {
+ /* copy feature arc data from template */
+ first_b0->current_config_index = bt.current_config_index;
+ vnet_buffer (first_b0)->feature_arc_index =
+ vnet_buffer (&bt)->feature_arc_index;
+ }
+ }
+
+ /* trace */
+ if (PREDICT_FALSE (n_trace > 0 &&
+ vlib_trace_buffer (vm, node, next0, first_b0,
+ /* follow_chain */ 0)))
+ {
+ af_packet_input_trace_t *tr;
+ vlib_set_trace_count (vm, node, --n_trace);
+ tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+ tr->is_v3 = 1;
+ tr->next_index = next0;
+ tr->hw_if_index = apif->hw_if_index;
+ tr->queue_id = queue_id;
+ tr->block = block;
+ tr->block_start = bd;
+ tr->pkt_num = bd->hdr.bh1.num_pkts - num_pkts;
+ clib_memcpy_fast (&tr->bd, bd, sizeof (block_desc_t));
+ clib_memcpy_fast (&tr->tph3, tph, sizeof (tpacket3_hdr_t));
+ if (is_cksum_gso_enabled)
+ clib_memcpy_fast (&tr->vnet_hdr, vnet_hdr,
+ sizeof (vnet_virtio_net_hdr_t));
+ else
+ clib_memset_u8 (&tr->vnet_hdr, 0,
+ sizeof (vnet_virtio_net_hdr_t));
+ }
+
+ /* enque and take next packet */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, first_bi0,
+ next0);
+
+ /* next packet */
+ num_pkts--;
+ rx_frame_offset += tph->tp_next_offset;
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ if (PREDICT_TRUE (num_pkts == 0))
+ {
+ bd->hdr.bh1.block_status = TP_STATUS_KERNEL;
+ block = (block + 1) % block_nr;
+ }
+ else
+ {
+ rx_queue->rx_frame_offset = rx_frame_offset;
+ rx_queue->num_rx_pkts = num_pkts;
+ rx_queue->is_rx_pending = 1;
+ }
+ }
+
+ rx_queue->next_rx_block = block;
+
+done:
+
+ if (apm->polling_count == 0)
+ {
+ if ((((block_desc_t *) (block_start = rx_queue->rx_ring[block]))
+ ->hdr.bh1.block_status &
+ TP_STATUS_USER) != 0)
+ vlib_node_set_state (vm, node->node_index, VLIB_NODE_STATE_POLLING);
+ else
+ vlib_node_set_state (vm, node->node_index, VLIB_NODE_STATE_INTERRUPT);
+ }
+
+ vlib_error_count (vm, node->node_index, AF_PACKET_INPUT_ERROR_TOTAL_RECV_BLK,
+ total);
+ vlib_error_count (vm, node->node_index, AF_PACKET_INPUT_ERROR_TIMEDOUT_BLK,
+ timedout_blk);
+
+ vlib_increment_combined_counter
+ (vnet_get_main ()->interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes);
+
+ vnet_device_increment_rx_packets (thread_index, n_rx_packets);
+ return n_rx_packets;
+}
+
+always_inline uword
+af_packet_v2_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, af_packet_if_t *apif,
+ u16 queue_id, u8 is_cksum_gso_enabled)
+{
+ af_packet_main_t *apm = &af_packet_main;
+ af_packet_queue_t *rx_queue = vec_elt_at_index (apif->rx_queues, queue_id);
+ tpacket2_hdr_t *tph;
+ u32 next_index;
+ u32 block = 0;
+ u32 rx_frame;
+ u32 n_free_bufs;
+ u32 n_rx_packets = 0;
+ u32 n_rx_bytes = 0;
+ u32 *to_next = 0;
+ u32 frame_size = rx_queue->rx_req->req.tp_frame_size;
+ u32 frame_num = rx_queue->rx_req->req.tp_frame_nr;
+ u8 *block_start = rx_queue->rx_ring[block];
+ uword n_trace = vlib_get_trace_count (vm, node);
+ u32 thread_index = vm->thread_index;
+ u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
+ u32 min_bufs = rx_queue->rx_req->req.tp_frame_size / n_buffer_bytes;
+ u8 is_ip = (apif->mode == AF_PACKET_IF_MODE_IP);
+ vlib_buffer_t bt = {};
+
+ if (is_ip)
+ {
+ next_index = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ }
+ else
+ {
+ next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
+ next_index = apif->per_interface_next_index;
+
+ /* redirect if feature path enabled */
+ vnet_feature_start_device_input_x1 (apif->sw_if_index, &next_index, &bt);
+ }
+
+ n_free_bufs = vec_len (apm->rx_buffers[thread_index]);
+ if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE))
+ {
+ vec_validate (apm->rx_buffers[thread_index],
+ VLIB_FRAME_SIZE + n_free_bufs - 1);
+ n_free_bufs += vlib_buffer_alloc (
+ vm, &apm->rx_buffers[thread_index][n_free_bufs], VLIB_FRAME_SIZE);
+ vec_set_len (apm->rx_buffers[thread_index], n_free_bufs);
+ }
+
+ rx_frame = rx_queue->next_rx_frame;
+ tph = (tpacket2_hdr_t *) (block_start + rx_frame * frame_size);
+ while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs))
+ {
+ vlib_buffer_t *b0 = 0, *first_b0 = 0, *prev_b0 = 0;
+ u32 next0 = next_index;
+
+ u32 n_left_to_next;
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs) &&
+ n_left_to_next)
+ {
+ vnet_virtio_net_hdr_t *vnet_hdr = 0;
+ u32 data_len = tph->tp_snaplen;
+ u32 offset = 0;
+ u32 bi0 = 0, first_bi0 = 0;
+ u8 l4_hdr_sz = 0;
+
+ if (is_cksum_gso_enabled)
+ vnet_hdr =
+ (vnet_virtio_net_hdr_t *) ((u8 *) tph + tph->tp_mac -
+ sizeof (vnet_virtio_net_hdr_t));
+ while (data_len)
+ {
+ /* grab free buffer */
+ u32 last_empty_buffer =
+ vec_len (apm->rx_buffers[thread_index]) - 1;
+ bi0 = apm->rx_buffers[thread_index][last_empty_buffer];
+ b0 = vlib_get_buffer (vm, bi0);
+ vec_set_len (apm->rx_buffers[thread_index], last_empty_buffer);
+ n_free_bufs--;
+
+ /* copy data */
+ u32 bytes_to_copy =
+ data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
+ u32 vlan_len = 0;
+ u32 bytes_copied = 0;
+ b0->current_data = 0;
+ /* Kernel removes VLAN headers, so reconstruct VLAN */
+ if (PREDICT_FALSE (tph->tp_status & TP_STATUS_VLAN_VALID))
+ {
+ if (PREDICT_TRUE (offset == 0))
+ {
+ clib_memcpy_fast (vlib_buffer_get_current (b0),
+ (u8 *) tph + tph->tp_mac,
+ sizeof (ethernet_header_t));
+ ethernet_header_t *eth = vlib_buffer_get_current (b0);
+ ethernet_vlan_header_t *vlan =
+ (ethernet_vlan_header_t *) (eth + 1);
+ vlan->priority_cfi_and_id =
+ clib_host_to_net_u16 (tph->tp_vlan_tci);
+ vlan->type = eth->type;
+ eth->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
+ vlan_len = sizeof (ethernet_vlan_header_t);
+ bytes_copied = sizeof (ethernet_header_t);
+ }
+ }
+ clib_memcpy_fast (((u8 *) vlib_buffer_get_current (b0)) +
+ bytes_copied + vlan_len,
+ (u8 *) tph + tph->tp_mac + offset +
+ bytes_copied,
+ (bytes_to_copy - bytes_copied));
+
+ /* fill buffer header */
+ b0->current_length = bytes_to_copy + vlan_len;
+
+ if (offset == 0)
+ {
+ b0->total_length_not_including_first_buffer = 0;
+ b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = apif->sw_if_index;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~0;
+ first_bi0 = bi0;
+ first_b0 = vlib_get_buffer (vm, first_bi0);
+
+ if (is_cksum_gso_enabled)
+ {
+ if (vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
+ fill_cksum_offload (first_b0, &l4_hdr_sz, is_ip);
+ if (vnet_hdr->gso_type & (VIRTIO_NET_HDR_GSO_TCPV4 |
+ VIRTIO_NET_HDR_GSO_TCPV6))
+ fill_gso_offload (first_b0, vnet_hdr->gso_size,
+ l4_hdr_sz);
+ }
+ }
+ else
+ buffer_add_to_chain (b0, first_b0, prev_b0, bi0);
+
+ prev_b0 = b0;
+ offset += bytes_to_copy;
+ data_len -= bytes_to_copy;
+ }
+ n_rx_packets++;
+ n_rx_bytes += tph->tp_snaplen;
+ to_next[0] = first_bi0;
+ to_next += 1;
+ n_left_to_next--;
+
+ /* drop partial packets */
+ if (PREDICT_FALSE (tph->tp_len != tph->tp_snaplen))
+ {
+ next0 = VNET_DEVICE_INPUT_NEXT_DROP;
+ first_b0->error =
+ node->errors[AF_PACKET_INPUT_ERROR_PARTIAL_PKT];
+ }
+ else
+ {
+ if (PREDICT_FALSE (is_ip))
+ {
+ switch (first_b0->data[0] & 0xf0)
+ {
+ case 0x40:
+ next0 = VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
+ break;
+ case 0x60:
+ next0 = VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
+ break;
+ default:
+ next0 = VNET_DEVICE_INPUT_NEXT_DROP;
+ break;
+ }
+ if (PREDICT_FALSE (apif->per_interface_next_index != ~0))
+ next0 = apif->per_interface_next_index;
+ }
+ else
+ {
+ /* copy feature arc data from template */
+ first_b0->current_config_index = bt.current_config_index;
+ vnet_buffer (first_b0)->feature_arc_index =
+ vnet_buffer (&bt)->feature_arc_index;
+ }
+ }
+
+ /* trace */
+ if (PREDICT_FALSE (n_trace > 0 &&
+ vlib_trace_buffer (vm, node, next0, first_b0,
+ /* follow_chain */ 0)))
+ {
+ af_packet_input_trace_t *tr;
+ vlib_set_trace_count (vm, node, --n_trace);
+ tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+ tr->is_v3 = 0;
+ tr->next_index = next0;
+ tr->hw_if_index = apif->hw_if_index;
+ tr->queue_id = queue_id;
+ clib_memcpy_fast (&tr->tph2, tph, sizeof (struct tpacket2_hdr));
+ if (is_cksum_gso_enabled)
+ clib_memcpy_fast (&tr->vnet_hdr, vnet_hdr,
+ sizeof (vnet_virtio_net_hdr_t));
+ else
+ clib_memset_u8 (&tr->vnet_hdr, 0,
+ sizeof (vnet_virtio_net_hdr_t));
+ }
+
+ /* enque and take next packet */
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, first_bi0, next0);
+
+ /* next packet */
+ tph->tp_status = TP_STATUS_KERNEL;
+ rx_frame = (rx_frame + 1) % frame_num;
+ tph = (struct tpacket2_hdr *) (block_start + rx_frame * frame_size);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ rx_queue->next_rx_frame = rx_frame;
+
+ vlib_increment_combined_counter (
+ vnet_get_main ()->interface_main.combined_sw_if_counters +
+ VNET_INTERFACE_COUNTER_RX,
+ vlib_get_thread_index (), apif->hw_if_index, n_rx_packets, n_rx_bytes);
+
+ vnet_device_increment_rx_packets (thread_index, n_rx_packets);
+ return n_rx_packets;
+}
+
+always_inline uword
+af_packet_device_input_fn (vlib_main_t *vm, vlib_node_runtime_t *node,
+ vlib_frame_t *frame, af_packet_if_t *apif,
+ u16 queue_id, u8 is_cksum_gso_enabled)
+
+{
+ if (apif->version == TPACKET_V3)
+ return af_packet_v3_device_input_fn (vm, node, frame, apif, queue_id,
+ is_cksum_gso_enabled);
+ else
+ return af_packet_v2_device_input_fn (vm, node, frame, apif, queue_id,
+ is_cksum_gso_enabled);
+}
+
+VLIB_NODE_FN (af_packet_input_node) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ u32 n_rx_packets = 0;
+ af_packet_main_t *apm = &af_packet_main;
+ vnet_hw_if_rxq_poll_vector_t *pv;
+ pv = vnet_hw_if_get_rxq_poll_vector (vm, node);
+ for (int i = 0; i < vec_len (pv); i++)
+ {
+ af_packet_if_t *apif;
+ apif = vec_elt_at_index (apm->interfaces, pv[i].dev_instance);
+ if (apif->is_admin_up)
+ {
+ if (apif->is_cksum_gso_enabled)
+ n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif,
+ pv[i].queue_id, 1);
+ else
+ n_rx_packets += af_packet_device_input_fn (vm, node, frame, apif,
+ pv[i].queue_id, 0);
+ }
+ }
+ return n_rx_packets;
+}
+
+VLIB_REGISTER_NODE (af_packet_input_node) = {
+ .name = "af-packet-input",
+ .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
+ .sibling_of = "device-input",
+ .format_trace = format_af_packet_input_trace,
+ .type = VLIB_NODE_TYPE_INPUT,
+ .state = VLIB_NODE_STATE_INTERRUPT,
+ .n_errors = AF_PACKET_INPUT_N_ERROR,
+ .error_strings = af_packet_input_error_strings,
+};
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/plugins/af_packet/plugin.c b/src/plugins/af_packet/plugin.c
new file mode 100644
index 00000000000..0146dd3e740
--- /dev/null
+++ b/src/plugins/af_packet/plugin.c
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright (c) 2022 Cisco Systems, Inc.
+ * License: Cisco Proprietary Closed Source License - Cisco Internal.
+ * The software, documentation and any fonts accompanying this License whether
+ * on disk, in read only memory, on any other media or in any other form (col-
+ * lectively the “Software”) are licensed, not sold, to you by Cisco, Inc.
+ * (“Cisco”) for use only under the terms of this License, and Cisco reserves
+ * all rights not expressly granted to you. The rights granted herein are
+ * limited to Cisco’s intel- lectual property rights in the Cisco Software and
+ * do not include any other patents or intellectual property rights. You own
+ * the media on which the Cisco Software is recorded but Cisco and/or Cisco’s
+ * licensor(s) retain ownership of the Software itself.
+ */
+
+#include <vlib/vlib.h>
+#include <vnet/plugin/plugin.h>
+#include <vpp/app/version.h>
+
+VLIB_PLUGIN_REGISTER () = {
+ .version = VPP_BUILD_VER,
+ .description = "af-packet",
+};