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-rw-r--r--src/vnet/devices/af_packet/af_packet.api71
-rw-r--r--src/vnet/devices/af_packet/af_packet.c366
-rw-r--r--src/vnet/devices/af_packet/af_packet.h69
-rw-r--r--src/vnet/devices/af_packet/af_packet_api.c143
-rw-r--r--src/vnet/devices/af_packet/cli.c144
-rw-r--r--src/vnet/devices/af_packet/device.c250
-rw-r--r--src/vnet/devices/af_packet/node.c288
7 files changed, 1331 insertions, 0 deletions
diff --git a/src/vnet/devices/af_packet/af_packet.api b/src/vnet/devices/af_packet/af_packet.api
new file mode 100644
index 00000000000..9fb2a2070f2
--- /dev/null
+++ b/src/vnet/devices/af_packet/af_packet.api
@@ -0,0 +1,71 @@
+/*
+ * 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.
+ */
+
+/** \brief Create 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
+ @param hw_addr - interface MAC
+ @param use_random_hw_addr - use random generated MAC
+*/
+define af_packet_create
+{
+ u32 client_index;
+ u32 context;
+
+ u8 host_if_name[64];
+ u8 hw_addr[6];
+ u8 use_random_hw_addr;
+};
+
+/** \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;
+ u32 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
+*/
+define af_packet_delete
+{
+ u32 client_index;
+ u32 context;
+
+ u8 host_if_name[64];
+};
+
+/** \brief Delete host-interface response
+ @param context - sender context, to match reply w/ request
+ @param retval - return value for request
+*/
+define af_packet_delete_reply
+{
+ u32 context;
+ i32 retval;
+};
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/af_packet/af_packet.c b/src/vnet/devices/af_packet/af_packet.c
new file mode 100644
index 00000000000..91c3988b439
--- /dev/null
+++ b/src/vnet/devices/af_packet/af_packet.c
@@ -0,0 +1,366 @@
+/*
+ *------------------------------------------------------------------
+ * 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:
+ */
diff --git a/src/vnet/devices/af_packet/af_packet.h b/src/vnet/devices/af_packet/af_packet.h
new file mode 100644
index 00000000000..19e2523d6c9
--- /dev/null
+++ b/src/vnet/devices/af_packet/af_packet.h
@@ -0,0 +1,69 @@
+/*
+ *------------------------------------------------------------------
+ * 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, u32 * sw_if_index);
+int af_packet_delete_if (vlib_main_t * vm, u8 * host_if_name);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/af_packet/af_packet_api.c b/src/vnet/devices/af_packet/af_packet_api.c
new file mode 100644
index 00000000000..414c838cdf7
--- /dev/null
+++ b/src/vnet/devices/af_packet/af_packet_api.c
@@ -0,0 +1,143 @@
+/*
+ *------------------------------------------------------------------
+ * 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 <vnet/devices/af_packet/af_packet.h>
+
+#include <vnet/vnet_msg_enum.h>
+
+#define vl_typedefs /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_typedefs
+
+#define vl_endianfun /* define message structures */
+#include <vnet/vnet_all_api_h.h>
+#undef vl_endianfun
+
+/* instantiate all the print functions we know about */
+#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__)
+#define vl_printfun
+#include <vnet/vnet_all_api_h.h>
+#undef vl_printfun
+
+#include <vlibapi/api_helper_macros.h>
+
+#define foreach_vpe_api_msg \
+_(AF_PACKET_CREATE, af_packet_create) \
+_(AF_PACKET_DELETE, af_packet_delete)
+
+static void
+vl_api_af_packet_create_t_handler (vl_api_af_packet_create_t * mp)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ vl_api_af_packet_create_reply_t *rmp;
+ int rv = 0;
+ u8 *host_if_name = NULL;
+ u32 sw_if_index;
+
+ host_if_name = format (0, "%s", mp->host_if_name);
+ vec_add1 (host_if_name, 0);
+
+ rv = af_packet_create_if (vm, host_if_name,
+ mp->use_random_hw_addr ? 0 : mp->hw_addr,
+ &sw_if_index);
+
+ vec_free (host_if_name);
+
+ /* *INDENT-OFF* */
+ REPLY_MACRO2(VL_API_AF_PACKET_CREATE_REPLY,
+ ({
+ rmp->sw_if_index = clib_host_to_net_u32(sw_if_index);
+ }));
+ /* *INDENT-ON* */
+}
+
+static void
+vl_api_af_packet_delete_t_handler (vl_api_af_packet_delete_t * mp)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ 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 (vm, host_if_name);
+
+ vec_free (host_if_name);
+
+ REPLY_MACRO (VL_API_AF_PACKET_DELETE_REPLY);
+}
+
+/*
+ * af_packet_api_hookup
+ * Add vpe's API message handlers to the table.
+ * vlib has alread mapped shared memory and
+ * added the client registration handlers.
+ * See .../vlib-api/vlibmemory/memclnt_vlib.c:memclnt_process()
+ */
+#define vl_msg_name_crc_list
+#include <vnet/vnet_all_api_h.h>
+#undef vl_msg_name_crc_list
+
+static void
+setup_message_id_table (api_main_t * am)
+{
+#define _(id,n,crc) vl_msg_api_add_msg_name_crc (am, #n "_" #crc, id);
+ foreach_vl_msg_name_crc_af_packet;
+#undef _
+}
+
+static clib_error_t *
+af_packet_api_hookup (vlib_main_t * vm)
+{
+ api_main_t *am = &api_main;
+
+#define _(N,n) \
+ vl_msg_api_set_handlers(VL_API_##N, #n, \
+ vl_api_##n##_t_handler, \
+ vl_noop_handler, \
+ vl_api_##n##_t_endian, \
+ vl_api_##n##_t_print, \
+ sizeof(vl_api_##n##_t), 1);
+ foreach_vpe_api_msg;
+#undef _
+
+ /*
+ * Set up the (msg_name, crc, message-id) table
+ */
+ setup_message_id_table (am);
+
+ 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/vnet/devices/af_packet/cli.c b/src/vnet/devices/af_packet/cli.c
new file mode 100644
index 00000000000..2cbd415289e
--- /dev/null
+++ b/src/vnet/devices/af_packet/cli.c
@@ -0,0 +1,144 @@
+/*
+ *------------------------------------------------------------------
+ * 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;
+ u32 sw_if_index;
+ 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, &sw_if_index);
+ vec_free (host_if_name);
+
+ 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");
+
+ vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name, vnet_get_main (),
+ sw_if_index);
+ return 0;
+}
+
+/* *INDENT-OFF* */
+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,
+};
+/* *INDENT-ON* */
+
+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;
+
+ /* 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
+ 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");
+
+ af_packet_delete_if (vm, host_if_name);
+ vec_free (host_if_name);
+
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (af_packet_delete_command, static) = {
+ .path = "delete host-interface",
+ .short_help = "delete host-interface name <interface name>",
+ .function = af_packet_delete_command_fn,
+};
+/* *INDENT-ON* */
+
+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/vnet/devices/af_packet/device.c b/src/vnet/devices/af_packet/device.c
new file mode 100644
index 00000000000..1fb4000f6e6
--- /dev/null
+++ b/src/vnet/devices/af_packet/device.c
@@ -0,0 +1,250 @@
+/*
+ *------------------------------------------------------------------
+ * 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") \
+_(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 _
+};
+
+
+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 = pool_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 =
+ pool_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 (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 ((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:
+ /* check if we've exhausted the ring */
+ if (PREDICT_FALSE (frame_not_ready + n_sent == frame_num))
+ break;
+
+ tx_frame = (tx_frame + 1) % frame_num;
+ }
+
+ 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);
+ }
+ }
+
+ 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_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;
+
+ apif->is_admin_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+
+ if (apif->is_admin_up)
+ hw_flags = VNET_HW_INTERFACE_FLAG_LINK_UP;
+ else
+ hw_flags = 0;
+
+ vnet_hw_interface_set_flags (vnm, hw_if_index, hw_flags);
+
+ 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;
+}
+
+/* *INDENT-OFF* */
+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,
+};
+
+VLIB_DEVICE_TX_FUNCTION_MULTIARCH (af_packet_device_class,
+ af_packet_interface_tx)
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c
new file mode 100644
index 00000000000..72004320c67
--- /dev/null
+++ b/src/vnet/devices/af_packet/node.c
@@ -0,0 +1,288 @@
+/*
+ *------------------------------------------------------------------
+ * 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/devices.h>
+#include <vnet/feature/feature.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 _
+};
+
+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 %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, format_ethernet_vlan_tci, t->tph.tp_vlan_tci
+#ifdef TP_STATUS_VLAN_TPID_VALID
+ , t->tph.tp_vlan_tpid
+#endif
+ );
+ 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);
+
+ /* 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;
+}
+
+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 = pool_elt_at_index (apm->interfaces, device_idx);
+ struct tpacket2_hdr *tph;
+ u32 next_index = VNET_DEVICE_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;
+ int cpu_index = node->cpu_index;
+
+ if (apif->per_interface_next_index != ~0)
+ next_index = apif->per_interface_next_index;
+
+ n_free_bufs = vec_len (apm->rx_buffers[cpu_index]);
+ if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE))
+ {
+ vec_validate (apm->rx_buffers[cpu_index],
+ VLIB_FRAME_SIZE + n_free_bufs - 1);
+ n_free_bufs +=
+ vlib_buffer_alloc (vm, &apm->rx_buffers[cpu_index][n_free_bufs],
+ VLIB_FRAME_SIZE);
+ _vec_len (apm->rx_buffers[cpu_index]) = 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 = 0, *first_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)
+ {
+ u32 data_len = tph->tp_snaplen;
+ u32 offset = 0;
+ u32 bi0 = 0, first_bi0 = 0, prev_bi0;
+
+ while (data_len)
+ {
+ /* grab free buffer */
+ u32 last_empty_buffer =
+ vec_len (apm->rx_buffers[cpu_index]) - 1;
+ prev_bi0 = bi0;
+ bi0 = apm->rx_buffers[cpu_index][last_empty_buffer];
+ b0 = vlib_get_buffer (vm, bi0);
+ _vec_len (apm->rx_buffers[cpu_index]) = 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;
+ clib_memcpy (vlib_buffer_get_current (b0),
+ (u8 *) tph + tph->tp_mac + offset, bytes_to_copy);
+
+ /* fill buffer header */
+ 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;
+ clib_memcpy (&tr->tph, tph, sizeof (struct tpacket2_hdr));
+ }
+
+ /* redirect if feature path enabled */
+ vnet_feature_start_device_input_x1 (apif->sw_if_index, &next0, b0,
+ 0);
+
+ /* 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;
+
+ /* *INDENT-OFF* */
+ clib_bitmap_foreach (i, apm->pending_input_bitmap,
+ ({
+ clib_bitmap_set (apm->pending_input_bitmap, i, 0);
+ n_rx_packets += af_packet_device_input_fn(vm, node, frame, i);
+ }));
+ /* *INDENT-ON* */
+
+ return n_rx_packets;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (af_packet_input_node) = {
+ .function = af_packet_input_fn,
+ .name = "af-packet-input",
+ .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,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (af_packet_input_node, af_packet_input_fn)
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */