98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/* Hey Emacs use -*- mode: C -*- */
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/*
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* Copyright 2021 Pim van Pelt <pim@ipng.nl>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/socket.h>
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#include <linux/if.h>
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#include <vnet/vnet.h>
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#include <vnet/plugin/plugin.h>
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#include <plugins/lcpng/lcpng_interface.h>
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#include <vlibapi/api.h>
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#include <vlibmemory/api.h>
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#include <vpp/app/version.h>
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#include <vnet/format_fns.h>
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#include <vnet/udp/udp.h>
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#include <vnet/tcp/tcp.h>
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#include <vnet/devices/tap/tap.h>
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#include <vnet/devices/netlink.h>
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/* walk function to copy forward all sw interface link state flags into
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* their counterpart LIP link state.
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*/
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static walk_rc_t
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lcp_itf_pair_walk_sync_state_cb (index_t lipi, void *ctx)
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{
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lcp_itf_pair_t *lip;
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vnet_sw_interface_t *phy;
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lip = lcp_itf_pair_get (lipi);
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if (!lip)
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return WALK_CONTINUE;
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phy =
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vnet_get_sw_interface_or_null (vnet_get_main (), lip->lip_phy_sw_if_index);
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if (!phy)
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return WALK_CONTINUE;
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LCP_ITF_PAIR_DBG ("walk_sync_state: lip %U flags %u", format_lcp_itf_pair,
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lip, phy->flags);
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lcp_itf_set_link_state (lip, (phy->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP));
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return WALK_CONTINUE;
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}
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static clib_error_t *
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lcp_itf_admin_state_change (vnet_main_t * vnm, u32 sw_if_index, u32 flags)
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{
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const lcp_itf_pair_t *lip;
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vnet_hw_interface_t *hi;
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vnet_sw_interface_t *si;
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LCP_ITF_PAIR_DBG ("admin_state_change: sw %U %u",
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format_vnet_sw_if_index_name, vnm, sw_if_index,
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flags);
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// Sync interface state changes into host
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lip = lcp_itf_pair_get (lcp_itf_pair_find_by_phy (sw_if_index));
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if (!lip) return NULL;
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LCP_ITF_PAIR_INFO ("admin_state_change: %U flags %u", format_lcp_itf_pair, lip, flags);
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lcp_itf_set_link_state (lip, (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP));
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// Sync PHY carrier changes into TAP
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hi = vnet_get_hw_interface_or_null (vnm, sw_if_index);
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si = vnet_get_sw_interface_or_null (vnm, lip->lip_host_sw_if_index);
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if (!si || !hi) return NULL;
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LCP_ITF_PAIR_DBG ("admin_state_change: hi %U si %U %u",
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format_vnet_sw_if_index_name, vnm, hi->hw_if_index,
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format_vnet_sw_if_index_name, vnm, si->sw_if_index, flags);
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tap_set_carrier (si->hw_if_index,
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(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP));
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// When Linux changes link on a master interface, all of its children also
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// change. This is not true in VPP, so we are forced to undo that change by
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// walking the sub-interfaces of a phy and syncing their state back into
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// linux. For simplicity, just walk all interfaces.
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lcp_itf_pair_walk (lcp_itf_pair_walk_sync_state_cb, 0);
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return NULL;
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}
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VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION(lcp_itf_admin_state_change);
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