diff options
Diffstat (limited to 'vnet/vnet/devices/af_packet/af_packet.c')
-rw-r--r-- | vnet/vnet/devices/af_packet/af_packet.c | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/vnet/vnet/devices/af_packet/af_packet.c b/vnet/vnet/devices/af_packet/af_packet.c deleted file mode 100644 index 91c3988b439..00000000000 --- a/vnet/vnet/devices/af_packet/af_packet.c +++ /dev/null @@ -1,366 +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_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 packet tx ring error handling option"); - 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: - if (*fd >= 0) - close (*fd); - *fd = -1; - return ret; -} - -int -af_packet_create_if (vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set, - u32 * sw_if_index) -{ - 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; - u8 *host_if_name_dup = vec_dup (host_if_name); - - 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 */ - pool_get (apm->interfaces, apif); - 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_dup; - apif->per_interface_next_index = ~0; - apif->next_tx_frame = 0; - apif->next_rx_frame = 0; - - { - 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) - clib_memcpy (hw_addr, hw_addr_set, 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; - } - - 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)); - pool_put (apm->interfaces, apif); - 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_dup, &if_index, - 0); - if (sw_if_index) - *sw_if_index = apif->sw_if_index; - return 0; - -error: - vec_free (host_if_name_dup); - vec_free (rx_req); - vec_free (tx_req); - return ret; -} - -int -af_packet_delete_if (vlib_main_t * vm, u8 * host_if_name) -{ - vnet_main_t *vnm = vnet_get_main (); - af_packet_main_t *apm = &af_packet_main; - af_packet_if_t *apif; - uword *p; - uword if_index; - u32 ring_sz; - - p = mhash_get (&apm->if_index_by_host_if_name, host_if_name); - if (p == NULL) - { - clib_warning ("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]); - if_index = apif - apm->interfaces; - - /* bring down the interface */ - vnet_hw_interface_set_flags (vnm, apif->hw_if_index, 0); - - /* clean up */ - if (apif->unix_file_index != ~0) - { - unix_file_del (&unix_main, unix_main.file_pool + apif->unix_file_index); - apif->unix_file_index = ~0; - } - else - close (apif->fd); - - ring_sz = apif->rx_req->tp_block_size * apif->rx_req->tp_block_nr + - apif->tx_req->tp_block_size * apif->tx_req->tp_block_nr; - if (munmap (apif->rx_ring, ring_sz)) - clib_warning ("Host interface %s could not free rx/tx ring", - host_if_name); - apif->rx_ring = NULL; - apif->tx_ring = NULL; - apif->fd = -1; - - vec_free (apif->rx_req); - apif->rx_req = NULL; - vec_free (apif->tx_req); - apif->tx_req = NULL; - - vec_free (apif->host_if_name); - apif->host_if_name = NULL; - - mhash_unset (&apm->if_index_by_host_if_name, host_if_name, &if_index); - - ethernet_delete_interface (vnm, apif->hw_if_index); - - pool_put (apm->interfaces, apif); - - 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 (); - - 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); - - return 0; -} - -VLIB_INIT_FUNCTION (af_packet_init); - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |