+++ /dev/null
-/*
- *------------------------------------------------------------------
- * 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 <stdint.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <vnet/devices/netmap/net_netmap.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/netmap/netmap.h>
-
-netmap_main_t netmap_main;
-
-static u32
-netmap_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi,
- u32 flags)
-{
- /* nothing for now */
- return 0;
-}
-
-static clib_error_t *
-netmap_fd_read_ready (clib_file_t * uf)
-{
- vlib_main_t *vm = vlib_get_main ();
- netmap_main_t *nm = &netmap_main;
- u32 idx = uf->private_data;
-
- nm->pending_input_bitmap =
- clib_bitmap_set (nm->pending_input_bitmap, idx, 1);
-
- /* Schedule the rx node */
- vlib_node_set_interrupt_pending (vm, netmap_input_node.index);
-
- return 0;
-}
-
-static void
-close_netmap_if (netmap_main_t * nm, netmap_if_t * nif)
-{
- if (nif->clib_file_index != ~0)
- {
- clib_file_del (&file_main, file_main.file_pool + nif->clib_file_index);
- nif->clib_file_index = ~0;
- }
- else if (nif->fd > -1)
- close (nif->fd);
-
- if (nif->mem_region)
- {
- netmap_mem_region_t *reg = &nm->mem_regions[nif->mem_region];
- if (--reg->refcnt == 0)
- {
- munmap (reg->mem, reg->region_size);
- reg->region_size = 0;
- }
- }
-
-
- mhash_unset (&nm->if_index_by_host_if_name, nif->host_if_name,
- &nif->if_index);
- vec_free (nif->host_if_name);
- vec_free (nif->req);
-
- clib_memset (nif, 0, sizeof (*nif));
- pool_put (nm->interfaces, nif);
-}
-
-int
-netmap_worker_thread_enable ()
-{
- /* if worker threads are enabled, switch to polling mode */
- foreach_vlib_main ((
- {
- vlib_node_set_state (this_vlib_main,
- netmap_input_node.index,
- VLIB_NODE_STATE_POLLING);
- }));
-
- return 0;
-}
-
-int
-netmap_worker_thread_disable ()
-{
- foreach_vlib_main ((
- {
- vlib_node_set_state (this_vlib_main,
- netmap_input_node.index,
- VLIB_NODE_STATE_INTERRUPT);
- }));
-
- return 0;
-}
-
-int
-netmap_create_if (vlib_main_t * vm, u8 * if_name, u8 * hw_addr_set,
- u8 is_pipe, u8 is_master, u32 * sw_if_index)
-{
- netmap_main_t *nm = &netmap_main;
- int ret = 0;
- netmap_if_t *nif = 0;
- u8 hw_addr[6];
- clib_error_t *error = 0;
- vnet_sw_interface_t *sw;
- vnet_main_t *vnm = vnet_get_main ();
- uword *p;
- struct nmreq *req = 0;
- netmap_mem_region_t *reg;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- int fd;
-
- p = mhash_get (&nm->if_index_by_host_if_name, if_name);
- if (p)
- return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
-
- fd = open ("/dev/netmap", O_RDWR);
- if (fd < 0)
- return VNET_API_ERROR_SUBIF_ALREADY_EXISTS;
-
- pool_get (nm->interfaces, nif);
- nif->if_index = nif - nm->interfaces;
- nif->fd = fd;
- nif->clib_file_index = ~0;
-
- vec_validate (req, 0);
- nif->req = req;
- req->nr_version = NETMAP_API;
- req->nr_flags = NR_REG_ALL_NIC;
-
- if (is_pipe)
- req->nr_flags = is_master ? NR_REG_PIPE_MASTER : NR_REG_PIPE_SLAVE;
- else
- req->nr_flags = NR_REG_ALL_NIC;
-
- req->nr_flags |= NR_ACCEPT_VNET_HDR;
- snprintf (req->nr_name, IFNAMSIZ, "%s", if_name);
- req->nr_name[IFNAMSIZ - 1] = 0;
-
- if (ioctl (nif->fd, NIOCREGIF, req))
- {
- ret = VNET_API_ERROR_NOT_CONNECTED;
- goto error;
- }
-
- nif->mem_region = req->nr_arg2;
- vec_validate (nm->mem_regions, nif->mem_region);
- reg = &nm->mem_regions[nif->mem_region];
- if (reg->region_size == 0)
- {
- reg->mem = mmap (NULL, req->nr_memsize, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, 0);
- clib_warning ("mem %p", reg->mem);
- if (reg->mem == MAP_FAILED)
- {
- ret = VNET_API_ERROR_NOT_CONNECTED;
- goto error;
- }
- reg->region_size = req->nr_memsize;
- }
- reg->refcnt++;
-
- nif->nifp = NETMAP_IF (reg->mem, req->nr_offset);
- nif->first_rx_ring = 0;
- nif->last_rx_ring = 0;
- nif->first_tx_ring = 0;
- nif->last_tx_ring = 0;
- nif->host_if_name = if_name;
- nif->per_interface_next_index = ~0;
-
- if (tm->n_vlib_mains > 1)
- clib_spinlock_init (&nif->lockp);
-
- {
- clib_file_t template = { 0 };
- template.read_function = netmap_fd_read_ready;
- template.file_descriptor = nif->fd;
- template.private_data = nif->if_index;
- template.description = format (0, "netmap socket");
- nif->clib_file_index = clib_file_add (&file_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, netmap_device_class.index,
- nif->if_index, hw_addr,
- &nif->hw_if_index,
- netmap_eth_flag_change);
-
- if (error)
- {
- clib_error_report (error);
- ret = VNET_API_ERROR_SYSCALL_ERROR_1;
- goto error;
- }
-
- sw = vnet_get_hw_sw_interface (vnm, nif->hw_if_index);
- nif->sw_if_index = sw->sw_if_index;
-
- mhash_set_mem (&nm->if_index_by_host_if_name, if_name, &nif->if_index, 0);
-
- if (sw_if_index)
- *sw_if_index = nif->sw_if_index;
-
- if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 1)
- netmap_worker_thread_enable ();
-
- return 0;
-
-error:
- close_netmap_if (nm, nif);
- return ret;
-}
-
-int
-netmap_delete_if (vlib_main_t * vm, u8 * host_if_name)
-{
- vnet_main_t *vnm = vnet_get_main ();
- netmap_main_t *nm = &netmap_main;
- netmap_if_t *nif;
- uword *p;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
-
- p = mhash_get (&nm->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;
- }
- nif = pool_elt_at_index (nm->interfaces, p[0]);
-
- /* bring down the interface */
- vnet_hw_interface_set_flags (vnm, nif->hw_if_index, 0);
-
- ethernet_delete_interface (vnm, nif->hw_if_index);
-
- close_netmap_if (nm, nif);
-
- if (tm->n_vlib_mains > 1 && pool_elts (nm->interfaces) == 0)
- netmap_worker_thread_disable ();
-
- return 0;
-}
-
-static clib_error_t *
-netmap_init (vlib_main_t * vm)
-{
- netmap_main_t *nm = &netmap_main;
- vlib_thread_main_t *tm = vlib_get_thread_main ();
- vlib_thread_registration_t *tr;
- uword *p;
-
- clib_memset (nm, 0, sizeof (netmap_main_t));
-
- nm->input_cpu_first_index = 0;
- nm->input_cpu_count = 1;
-
- /* find out which cpus will be used for input */
- p = hash_get_mem (tm->thread_registrations_by_name, "workers");
- tr = p ? (vlib_thread_registration_t *) p[0] : 0;
-
- if (tr && tr->count > 0)
- {
- nm->input_cpu_first_index = tr->first_index;
- nm->input_cpu_count = tr->count;
- }
-
- mhash_init_vec_string (&nm->if_index_by_host_if_name, sizeof (uword));
-
- vec_validate_aligned (nm->rx_buffers, tm->n_vlib_mains - 1,
- CLIB_CACHE_LINE_BYTES);
-
- return 0;
-}
-
-VLIB_INIT_FUNCTION (netmap_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff