diff options
Diffstat (limited to 'src/vnet/devices/af_packet/device.c')
| -rw-r--r-- | src/vnet/devices/af_packet/device.c | 396 |
1 files changed, 0 insertions, 396 deletions
diff --git a/src/vnet/devices/af_packet/device.c b/src/vnet/devices/af_packet/device.c deleted file mode 100644 index 8a6ff1de649..00000000000 --- a/src/vnet/devices/af_packet/device.c +++ /dev/null @@ -1,396 +0,0 @@ -/* - *------------------------------------------------------------------ - * 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/devices/af_packet/af_packet.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 _ -}; - - -#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); - clib_spinlock_lock_if_init (&apif->lockp); - 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; - int block = 0; - u8 *block_start = apif->tx_ring + block * block_size; - u32 tx_frame = apif->next_tx_frame; - struct tpacket2_hdr *tph; - - s = format (s, "Linux PACKET socket interface\n"); - s = format (s, "%Ublock:%d frame:%d\n", format_white_space, indent, - block_size, frame_size); - s = format (s, "%Unext frame:%d\n", format_white_space, indent, - apif->next_tx_frame); - - int n_send_req = 0, n_avail = 0, n_sending = 0, n_tot = 0, n_wrong = 0; - do - { - tph = (struct tpacket2_hdr *) (block_start + tx_frame * frame_size); - tx_frame = (tx_frame + 1) % frame_num; - if (tph->tp_status == 0) - n_avail++; - else if (tph->tp_status & TP_STATUS_SEND_REQUEST) - n_send_req++; - else if (tph->tp_status & TP_STATUS_SENDING) - n_sending++; - else - n_wrong++; - n_tot++; - } - while (tx_frame != apif->next_tx_frame); - s = format (s, "%Uavailable:%d request:%d sending:%d wrong:%d total:%d\n", - format_white_space, indent, n_avail, n_send_req, n_sending, - n_wrong, n_tot); - - clib_spinlock_unlock_if_init (&apif->lockp); - return s; -} - -static u8 * -format_af_packet_tx_trace (u8 * s, va_list * args) -{ - s = format (s, "Unimplemented..."); - return s; -} - -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; - 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); - clib_spinlock_lock_if_init (&apif->lockp); - 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) - { - 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 (PREDICT_FALSE (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; - clib_memcpy_fast ((u8 *) tph + - TPACKET_ALIGN (sizeof (struct tpacket2_hdr)) + - offset, vlib_buffer_get_current (b0), len); - offset += len; - } - while ((bi = - (b0->flags & VLIB_BUFFER_NEXT_PRESENT) ? b0->next_buffer : 0)); - - tph->tp_len = tph->tp_snaplen = offset; - tph->tp_status = TP_STATUS_SEND_REQUEST; - n_sent++; - - tx_frame = (tx_frame + 1) % frame_num; - - next: - /* 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)) - { - apif->next_tx_frame = tx_frame; - - if (PREDICT_FALSE (sendto (apif->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. - */ - vlib_error_count (vm, node->node_index, - unix_error_is_fatal (errno) ? - AF_PACKET_TX_ERROR_TXRING_FATAL : - AF_PACKET_TX_ERROR_TXRING_EAGAIN, - n_sent); - } - } - - clib_spinlock_unlock_if_init (&apif->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 = 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, 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 */ -} - -/* *INDENT-OFF* */ -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, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |