e.events = EPOLLIN;
if (f->flags & UNIX_FILE_DATA_AVAILABLE_TO_WRITE)
e.events |= EPOLLOUT;
+ if (f->flags & UNIX_FILE_EVENT_EDGE_TRIGGERED)
+ e.events |= EPOLLET;
e.data.u32 = f - um->file_pool;
if (epoll_ctl (em->epoll_fd,
u32 flags;
#define UNIX_FILE_DATA_AVAILABLE_TO_WRITE (1 << 0)
+#define UNIX_FILE_EVENT_EDGE_TRIGGERED (1 << 1)
/* Data available for function's use. */
uword private_data;
nobase_include_HEADERS += \
vnet/devices/ssvm/ssvm_eth.h
+########################################
+# Linux packet interface
+########################################
+
+libvnet_la_SOURCES += \
+ vnet/devices/af_packet/af_packet.c \
+ vnet/devices/af_packet/device.c \
+ vnet/devices/af_packet/node.c \
+ vnet/devices/af_packet/cli.c
+
+nobase_include_HEADERS += \
+ vnet/devices/af_packet/af_packet.h
+
########################################
# Unix kernel related
########################################
_(TUNNEL_EXIST, -75, "Tunnel already exists") \
_(INVALID_DECAP_NEXT, -76, "Invalid decap-next") \
_(RESPONSE_NOT_READY, -77, "Response not ready") \
-_(NOT_CONNECTED, -78, "Not connected to the data plane")
+_(NOT_CONNECTED, -78, "Not connected to the data plane") \
+_(IF_ALREADY_EXISTS, -79, "Interface already exists")
typedef enum {
#define _(a,b,c) VNET_API_ERROR_##a = (b),
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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 <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vnet/devices/af_packet/af_packet.h>
+
+#define AF_PACKET_DEBUG_SOCKET 0
+
+#define AF_PACKET_TX_FRAMES_PER_BLOCK 1024
+#define AF_PACKET_TX_FRAME_SIZE (2048 * 5)
+#define AF_PACKET_TX_BLOCK_NR 1
+#define AF_PACKET_TX_FRAME_NR (AF_PACKET_TX_BLOCK_NR * \
+ AF_PACKET_TX_FRAMES_PER_BLOCK)
+#define AF_PACKET_TX_BLOCK_SIZE (AF_PACKET_TX_FRAME_SIZE * \
+ AF_PACKET_TX_FRAMES_PER_BLOCK)
+
+#define AF_PACKET_RX_FRAMES_PER_BLOCK 1024
+#define AF_PACKET_RX_FRAME_SIZE (2048 * 5)
+#define AF_PACKET_RX_BLOCK_NR 1
+#define AF_PACKET_RX_FRAME_NR (AF_PACKET_RX_BLOCK_NR * \
+ AF_PACKET_RX_FRAMES_PER_BLOCK)
+#define AF_PACKET_RX_BLOCK_SIZE (AF_PACKET_RX_FRAME_SIZE * \
+ AF_PACKET_RX_FRAMES_PER_BLOCK)
+
+#if AF_PACKET_DEBUG_SOCKET == 1
+#define DBG_SOCK(args...) clib_warning(args);
+#else
+#define DBG_SOCK(args...)
+#endif
+
+/*defined in net/if.h but clashes with dpdk headers */
+unsigned int if_nametoindex(const char *ifname);
+
+typedef struct tpacket_req tpacket_req_t;
+
+static u32
+af_packet_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags)
+{
+ /* nothing for now */
+ return 0;
+}
+
+static clib_error_t * af_packet_fd_read_ready (unix_file_t * uf)
+{
+ vlib_main_t * vm = vlib_get_main();
+ af_packet_main_t * apm = &af_packet_main;
+ u32 idx = uf->private_data;
+
+ apm->pending_input_bitmap = clib_bitmap_set (apm->pending_input_bitmap, idx, 1);
+
+ /* Schedule the rx node */
+ vlib_node_set_interrupt_pending (vm, af_packet_input_node.index);
+
+ return 0;
+}
+
+static int
+create_packet_v2_sock(u8 * name, tpacket_req_t * rx_req, tpacket_req_t * tx_req,
+ int *fd, u8 ** ring)
+{
+ int ret, err;
+ struct sockaddr_ll sll;
+ uint host_if_index;
+ int ver = TPACKET_V2;
+ socklen_t req_sz = sizeof(struct tpacket_req);
+ u32 ring_sz = rx_req->tp_block_size * rx_req->tp_block_nr +
+ tx_req->tp_block_size * tx_req->tp_block_nr;
+
+ host_if_index = if_nametoindex((const char *) name);
+
+ if (!host_if_index)
+ {
+ DBG_SOCK("Wrong host interface name");
+ ret = VNET_API_ERROR_INVALID_INTERFACE;
+ goto error;
+ }
+
+ if ((*fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0)
+ {
+ DBG_SOCK("Failed to create socket");
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ if ((err = setsockopt(*fd, SOL_PACKET, PACKET_VERSION, &ver, sizeof(ver))) < 0)
+ {
+ DBG_SOCK("Failed to set rx packet interface version");
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ int opt = 1;
+ if ((err = setsockopt(*fd, SOL_PACKET, PACKET_LOSS, &opt, sizeof(opt))) < 0)
+ {
+ DBG_SOCK("Failed to set rx packet interface version");
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ if ((err = setsockopt(*fd, SOL_PACKET, PACKET_RX_RING, rx_req, req_sz)) < 0)
+ {
+ DBG_SOCK("Failed to set packet rx ring options");
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ if ((err = setsockopt(*fd, SOL_PACKET, PACKET_TX_RING, tx_req, req_sz)) < 0)
+ {
+ DBG_SOCK("Failed to set packet rx ring options");
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ *ring = mmap(NULL, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, *fd, 0);
+ if (*ring == MAP_FAILED)
+ {
+ DBG_SOCK("mmap failure");
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ memset(&sll, 0, sizeof(sll));
+ sll.sll_family = PF_PACKET;
+ sll.sll_protocol = htons(ETH_P_ALL);
+ sll.sll_ifindex = host_if_index;
+
+ if ((err = bind(*fd, (struct sockaddr *) &sll, sizeof(sll))) < 0)
+ {
+ DBG_SOCK("Failed to bind rx packet socket (error %d)", err);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ return 0;
+error:
+ close(*fd);
+ return ret;
+}
+
+int
+af_packet_create_if(vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set)
+{
+ af_packet_main_t * apm = &af_packet_main;
+ int ret, fd = -1;
+ struct tpacket_req * rx_req = 0;
+ struct tpacket_req * tx_req = 0;
+ u8 * ring = 0;
+ af_packet_if_t * apif = 0;
+ u8 hw_addr[6];
+ clib_error_t * error;
+ vnet_sw_interface_t * sw;
+ vnet_main_t *vnm = vnet_get_main();
+ uword * p;
+ uword if_index;
+
+ p = mhash_get (&apm->if_index_by_host_if_name, host_if_name);
+ if (p)
+ {
+ return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
+ }
+
+ vec_validate(rx_req, 0);
+ rx_req->tp_block_size = AF_PACKET_RX_BLOCK_SIZE;
+ rx_req->tp_frame_size = AF_PACKET_RX_FRAME_SIZE;
+ rx_req->tp_block_nr = AF_PACKET_RX_BLOCK_NR;
+ rx_req->tp_frame_nr = AF_PACKET_RX_FRAME_NR;
+
+ vec_validate(tx_req, 0);
+ tx_req->tp_block_size = AF_PACKET_TX_BLOCK_SIZE;
+ tx_req->tp_frame_size = AF_PACKET_TX_FRAME_SIZE;
+ tx_req->tp_block_nr = AF_PACKET_TX_BLOCK_NR;
+ tx_req->tp_frame_nr = AF_PACKET_TX_FRAME_NR;
+
+ ret = create_packet_v2_sock(host_if_name, rx_req, tx_req, &fd, &ring);
+
+ if (ret != 0)
+ goto error;
+
+ /* So far everything looks good, let's create interface */
+ vec_add2 (apm->interfaces, apif, 1);
+ if_index = apif - apm->interfaces;
+
+ apif->fd = fd;
+ apif->rx_ring = ring;
+ apif->tx_ring = ring + rx_req->tp_block_size * rx_req->tp_block_nr;
+ apif->rx_req = rx_req;
+ apif->tx_req = tx_req;
+ apif->host_if_name = host_if_name;
+
+ {
+ unix_file_t template = {0};
+ template.read_function = af_packet_fd_read_ready;
+ template.file_descriptor = fd;
+ template.private_data = if_index;
+ template.flags = UNIX_FILE_EVENT_EDGE_TRIGGERED;
+ apif->unix_file_index = unix_file_add (&unix_main, &template);
+ }
+
+ /*use configured or generate random MAC address */
+ if (hw_addr_set)
+ memcpy(hw_addr, hw_addr_set, 6);
+ else
+ {
+ f64 now = vlib_time_now(vm);
+ u32 rnd;
+ rnd = (u32) (now * 1e6);
+ rnd = random_u32 (&rnd);
+
+ memcpy (hw_addr+2, &rnd, sizeof(rnd));
+ hw_addr[0] = 2;
+ hw_addr[1] = 0xfe;
+ }
+
+ error = ethernet_register_interface(vnm, af_packet_device_class.index,
+ if_index, hw_addr, &apif->hw_if_index,
+ af_packet_eth_flag_change);
+
+ if (error)
+ {
+ memset(apif, 0, sizeof(*apif));
+ _vec_len(apm->interfaces) -= 1;
+ clib_error_report (error);
+ ret = VNET_API_ERROR_SYSCALL_ERROR_1;
+ goto error;
+ }
+
+ sw = vnet_get_hw_sw_interface (vnm, apif->hw_if_index);
+ apif->sw_if_index = sw->sw_if_index;
+
+ 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, &if_index, 0);
+
+ return 0;
+
+error:
+ vec_free(host_if_name);
+ vec_free(rx_req);
+ vec_free(tx_req);
+ return ret;
+}
+
+static clib_error_t *
+af_packet_init (vlib_main_t * vm)
+{
+ af_packet_main_t * apm = &af_packet_main;
+
+ memset (apm, 0, sizeof (af_packet_main_t));
+
+ mhash_init_vec_string (&apm->if_index_by_host_if_name, sizeof (uword));
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (af_packet_init);
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+typedef struct {
+ CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
+ u8 * host_if_name;
+ int fd;
+ struct tpacket_req * rx_req;
+ struct tpacket_req * tx_req;
+ u8 * rx_ring;
+ u8 * tx_ring;
+ u32 hw_if_index;
+ u32 sw_if_index;
+ u32 unix_file_index;
+
+ u32 next_rx_frame;
+ u32 next_tx_frame;
+
+ u32 per_interface_next_index;
+ u8 is_admin_up;
+} af_packet_if_t;
+
+typedef struct {
+ CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
+ af_packet_if_t * interfaces;
+
+ /* bitmap of pending rx interfaces */
+ uword * pending_input_bitmap;
+
+ /* rx buffer cache */
+ u32 * rx_buffers;
+
+ /* hash of host interface names */
+ mhash_t if_index_by_host_if_name;
+} af_packet_main_t;
+
+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(vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set);
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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 <vnet/devices/af_packet/af_packet.h>
+
+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;
+ u8 * host_if_name = NULL;
+ u8 hwaddr [6];
+ u8 * hw_addr_ptr = 0;
+ int r;
+
+ /* 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 if (unformat (line_input, "hw-addr %U", unformat_ethernet_address, hwaddr))
+ hw_addr_ptr = hwaddr;
+ else
+ return clib_error_return (0, "unknown input `%U'", format_unformat_error, input);
+ }
+ unformat_free (line_input);
+
+ if (host_if_name == NULL)
+ return clib_error_return (0, "missing host interface name");
+
+ r = af_packet_create_if(vm, host_if_name, hw_addr_ptr);
+
+ if (r == VNET_API_ERROR_SYSCALL_ERROR_1)
+ return clib_error_return(0, "%s (errno %d)", strerror (errno), errno);
+
+ if (r == VNET_API_ERROR_INVALID_INTERFACE)
+ return clib_error_return(0, "Invalid interface name");
+
+ if (r == VNET_API_ERROR_SUBIF_ALREADY_EXISTS)
+ return clib_error_return(0, "Interface elready exists");
+
+ return 0;
+}
+
+VLIB_CLI_COMMAND (af_packet_create_command, static) = {
+ .path = "create host-interface",
+ .short_help = "create host-interface name <interface name> [hw-addr <mac>]",
+ .function = af_packet_create_command_fn,
+};
+
+clib_error_t *
+af_packet_cli_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (af_packet_cli_init);
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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/devices/af_packet/af_packet.h>
+
+#define foreach_af_packet_tx_func_error \
+_(FRAME_NOT_READY, "tx frame not ready")
+
+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 _
+};
+
+
+static 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 = vec_elt_at_index (apm->interfaces, i);
+
+ s = format (s, "host-%s", apif->host_if_name);
+ return s;
+}
+
+static u8 * format_af_packet_device (u8 * s, va_list * args)
+{
+ s = format (s, "Linux PACKET socket interface");
+ return s;
+}
+
+static u8 * format_af_packet_tx_trace (u8 * s, va_list * args)
+{
+ s = format (s, "Unimplemented...");
+ return s;
+}
+
+static uword
+af_packet_interface_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ af_packet_main_t * apm = &af_packet_main;
+ u32 * buffers = vlib_frame_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 = vec_elt_at_index (apm->interfaces, rd->dev_instance);
+ int block = 0;
+ u32 block_size = apif->tx_req->tp_block_size;
+ u32 frame_size = apif->tx_req->tp_frame_size;
+ u32 frame_num = apif->tx_req->tp_frame_nr;
+ u8 * block_start = apif->tx_ring + block * block_size;
+ u32 tx_frame = apif->next_tx_frame;
+ struct tpacket2_hdr * tph;
+ u32 frame_not_ready = 0;
+
+ while(n_left > 0)
+ {
+ u32 len;
+ u32 offset = 0;
+ vlib_buffer_t * b0;
+ n_left--;
+ u32 bi = buffers[0];
+ buffers++;
+
+ tph = (struct tpacket2_hdr *) (block_start + tx_frame * frame_size);
+
+ if(tph->tp_status & (TP_STATUS_SEND_REQUEST | TP_STATUS_SENDING))
+ {
+ frame_not_ready++;
+ goto next;
+ }
+
+ do
+ {
+ b0 = vlib_get_buffer (vm, bi);
+ len = b0->current_length;
+ memcpy((u8 *) tph + TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + offset,
+ vlib_buffer_get_current(b0), len);
+ offset += len;
+ }
+ while ((bi = b0->next_buffer));
+
+ tph->tp_len = tph->tp_snaplen = offset;
+ tph->tp_status = TP_STATUS_SEND_REQUEST;
+ n_sent++;
+next:
+ tx_frame = (tx_frame + 1) % frame_num;
+ }
+
+ CLIB_MEMORY_BARRIER();
+
+ if (n_sent)
+ {
+ apif->next_tx_frame = tx_frame;
+ if (sendto(apif->fd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1)
+ clib_unix_error("tx sendto failure");
+ }
+
+ if (frame_not_ready)
+ vlib_error_count (vm, node->node_index, AF_PACKET_TX_ERROR_FRAME_NOT_READY,
+ frame_not_ready);
+
+ vlib_buffer_free (vm, vlib_frame_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);
+
+ apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+ return 0;
+}
+
+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;
+}
+
+VNET_DEVICE_CLASS (af_packet_device_class) = {
+ .name = "af-packet",
+ .tx_function = af_packet_interface_tx,
+ .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,
+ .no_flatten_output_chains = 1,
+};
\ No newline at end of file
--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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/devices/af_packet/af_packet.h>
+
+#define foreach_af_packet_input_error
+
+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 _
+};
+
+enum {
+ AF_PACKET_INPUT_NEXT_DROP,
+ AF_PACKET_INPUT_NEXT_ETHERNET_INPUT,
+ AF_PACKET_INPUT_N_NEXT,
+};
+
+typedef struct {
+ u32 next_index;
+ u32 hw_if_index;
+ int block;
+ struct tpacket2_hdr tph;
+} 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 *);
+ uword indent = format_get_indent (s);
+
+ s = format (s, "af_packet: hw_if_index %d next-index %d",
+ t->hw_if_index, t->next_index);
+
+ 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_tci %u"
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ " vlan_tpid %u"
+#endif
+ ,
+ format_white_space, indent + 2,
+ format_white_space, indent + 4,
+ t->tph.tp_status,
+ t->tph.tp_len,
+ t->tph.tp_snaplen,
+ t->tph.tp_mac,
+ t->tph.tp_net,
+ format_white_space, indent + 4,
+ t->tph.tp_sec,
+ t->tph.tp_nsec,
+ t->tph.tp_vlan_tci,
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ t->tph.tp_vlan_tpid,
+#endif
+ t->tph.tp_net);
+ return s;
+}
+
+always_inline void
+buffer_add_to_chain(vlib_main_t *vm, u32 bi, u32 first_bi, u32 prev_bi)
+{
+ vlib_buffer_t * b = vlib_get_buffer (vm, bi);
+ vlib_buffer_t * first_b = vlib_get_buffer (vm, first_bi);
+ vlib_buffer_t * prev_b = vlib_get_buffer (vm, prev_bi);
+#if DPDK > 0
+ struct rte_mbuf * mbuf = ((struct rte_mbuf *) b) - 1;
+ struct rte_mbuf * first_mbuf = ((struct rte_mbuf *) first_b) - 1;
+ struct rte_mbuf * prev_mbuf = ((struct rte_mbuf *) prev_b) - 1;
+#endif
+
+ /* 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;
+
+#if DPDK > 0
+ first_mbuf->nb_segs++;
+ prev_mbuf->next = mbuf;
+ mbuf->data_len = b->current_length;
+ mbuf->data_off = RTE_PKTMBUF_HEADROOM + b->current_data;
+ mbuf->next = 0;
+#endif
+}
+
+always_inline uword
+af_packet_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u32 device_idx)
+{
+ af_packet_main_t * apm = &af_packet_main;
+ af_packet_if_t * apif = vec_elt_at_index(apm->interfaces, device_idx);
+ struct tpacket2_hdr *tph;
+ u32 next_index = AF_PACKET_INPUT_NEXT_ETHERNET_INPUT;
+ 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 block_size = apif->rx_req->tp_block_size;
+ u32 frame_size = apif->rx_req->tp_frame_size;
+ u32 frame_num = apif->rx_req->tp_frame_nr;
+ u8 * block_start = apif->rx_ring + block * block_size;
+ uword n_trace = vlib_get_trace_count (vm, node);
+ u32 n_buffer_bytes = vlib_buffer_free_list_buffer_size (vm,
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ u32 min_bufs = apif->rx_req->tp_frame_size / n_buffer_bytes;
+
+ n_free_bufs = vec_len (apm->rx_buffers);
+ if (PREDICT_FALSE(n_free_bufs < VLIB_FRAME_SIZE))
+ {
+ vec_validate(apm->rx_buffers, VLIB_FRAME_SIZE + n_free_bufs - 1);
+ n_free_bufs += vlib_buffer_alloc(vm, &apm->rx_buffers[n_free_bufs], VLIB_FRAME_SIZE);
+ _vec_len (apm->rx_buffers) = n_free_bufs;
+ }
+
+ rx_frame = apif->next_rx_frame;
+ tph = (struct tpacket2_hdr *) (block_start + rx_frame * frame_size);
+ while ((tph->tp_status & TP_STATUS_USER) && (n_free_bufs > min_bufs))
+ {
+ vlib_buffer_t * b0, * first_b0 = 0;
+ u32 next0 = AF_PACKET_INPUT_NEXT_ETHERNET_INPUT;
+
+ 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)
+ {
+ u32 data_len = tph->tp_snaplen;
+ u32 offset = 0;
+ u32 bi0, first_bi0 = 0, prev_bi0;
+
+ while (data_len)
+ {
+ /* grab free buffer */
+ u32 last_empty_buffer = vec_len (apm->rx_buffers) - 1;
+ prev_bi0 = bi0;
+ bi0 = apm->rx_buffers[last_empty_buffer];
+ b0 = vlib_get_buffer (vm, bi0);
+ _vec_len (apm->rx_buffers) = last_empty_buffer;
+ n_free_bufs--;
+
+ /* copy data */
+ u32 bytes_to_copy = data_len > n_buffer_bytes ? n_buffer_bytes : data_len;
+ b0->current_data = 0;
+ memcpy (vlib_buffer_get_current (b0), (u8 *) tph + tph->tp_mac + offset, bytes_to_copy);
+
+ /* fill buffer header */
+ b0->clone_count = 0;
+ b0->current_length = bytes_to_copy;
+
+ 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);
+ }
+ else
+ buffer_add_to_chain(vm, bi0, first_bi0, prev_bi0);
+
+ 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--;
+
+ /* trace */
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT(first_b0);
+ if (PREDICT_FALSE(n_trace > 0))
+ {
+ af_packet_input_trace_t *tr;
+ vlib_trace_buffer (vm, node, next0, first_b0, /* follow_chain */ 0);
+ vlib_set_trace_count (vm, node, --n_trace);
+ tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr));
+ tr->next_index = next0;
+ tr->hw_if_index = apif->hw_if_index;
+ memcpy(&tr->tph, tph, sizeof(struct tpacket2_hdr));
+ }
+ /* 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);
+ }
+
+ apif->next_rx_frame = rx_frame;
+
+ vlib_increment_combined_counter
+ (vnet_get_main()->interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX,
+ os_get_cpu_number(),
+ apif->hw_if_index,
+ n_rx_packets, n_rx_bytes);
+
+ return n_rx_packets;
+}
+
+static uword
+af_packet_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ int i;
+ u32 n_rx_packets = 0;
+
+ af_packet_main_t * apm = &af_packet_main;
+
+ clib_bitmap_foreach (i, apm->pending_input_bitmap,
+ ({
+ clib_bitmap_set (apm->pending_input_bitmap, i, 1);
+ n_rx_packets += af_packet_device_input_fn(vm, node, frame, i);
+ }));
+
+ return n_rx_packets;
+}
+
+
+VLIB_REGISTER_NODE (af_packet_input_node) = {
+ .function = af_packet_input_fn,
+ .name = "af-packet-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,
+
+ .n_next_nodes = AF_PACKET_INPUT_N_NEXT,
+ .next_nodes = {
+ [AF_PACKET_INPUT_NEXT_DROP] = "error-drop",
+ [AF_PACKET_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
+ },
+};
Code Review / vpp.git / commitdiff