2017-12-07 18:13:54 +01:00
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/* zebra NETNS ID handling routines
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* Copyright (C) 2018 6WIND
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined(__ZEBRA_NS_ID_H__)
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#define __ZEBRA_NS_ID_H__
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#include "zebra.h"
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#include "ns.h"
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2019-03-25 15:11:55 +01:00
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#ifdef __cplusplus
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extern "C" {
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#endif
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2020-06-03 13:22:26 +02:00
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extern ns_id_t zebra_ns_id_get(const char *netnspath);
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zebra: upon startup, a NSID is assigned to default netns
when the netns backend is selected for VRF, the default VRF is being
assigned a NSID. This avoids the need to handle the case where if the
incoming NSID was 0 for a non default VRF, then a specific handling had
to be done to keep 0 value for default VRF.
In most cases, as the first NETNS to get a NSID will be the default VRF,
most probably the default VRF will be assigned to 0, while the other
ones will have their value incremented. On some cases, where the NSID is
already assigned for NETNS, including default VRF, then the default VRF
value will be the one derived from the NSID of default VRF, thus keeping
consistency between VRF IDs and NETNS IDs.
Default NS is attempted to be created. Actually, some VMs may have the
netns feature, but the NS initialisation fails because that folder is
not present.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
2018-01-16 13:59:58 +01:00
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extern ns_id_t zebra_ns_id_get_default(void);
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zebra, lib: add an internal API to get relative default nsid in other ns
as remind, the netns identifiers are local to a namespace. that is to
say that for instance, a vrf <vrfx> will have a netns id value in one
netns, and have an other netns id value in one other netns.
There is a need for zebra daemon to collect some cross information, like
the LINK_NETNSID information from interfaces having link layer in an
other network namespace. For that, it is needed to have a global
overview instead of a relative overview per namespace.
The first brick of this change is an API that sticks to netlink API,
that uses NETNSA_TARGET_NSID. from a given vrf vrfX, and a new vrf
created vrfY, the API returns the value of nsID from vrfX, inside the
new vrf vrfY.
The brick also gets the ns id value of default namespace in each other
namespace. An additional value in ns.h is offered, that permits to
retrieve the default namespace context.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
2019-10-02 12:14:13 +02:00
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extern ns_id_t zebra_ns_id_get_relative_value(ns_id_t ns_read,
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ns_id_t target_nsid);
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2017-12-07 18:13:54 +01:00
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2019-03-25 15:11:55 +01:00
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#ifdef __cplusplus
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}
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#endif
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2017-12-07 18:13:54 +01:00
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#endif /* __ZEBRA_NS_ID_H__ */
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