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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>
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/*
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* NS related header.
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* Copyright (C) 2014 6WIND S.A.
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2, or (at your
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* option) any later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for 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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#ifndef _ZEBRA_NS_H
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#define _ZEBRA_NS_H
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#include "openbsd-tree.h"
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#include "linklist.h"
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#include "vty.h"
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#include "vrf.h"
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typedef u_int32_t ns_id_t;
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/* the default NS ID */
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#define NS_UNKNOWN UINT32_MAX
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/* Default netns directory (Linux) */
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#define NS_RUN_DIR "/var/run/netns"
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#ifdef HAVE_NETNS
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#define NS_DEFAULT_NAME "/proc/self/ns/net"
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#else /* !HAVE_NETNS */
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#define NS_DEFAULT_NAME "Default-logical-router"
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#endif /* HAVE_NETNS */
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struct ns {
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RB_ENTRY(ns) entry;
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/* Identifier, same as the vector index */
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ns_id_t ns_id;
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/* Name */
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char *name;
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/* File descriptor */
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int fd;
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/* Master list of interfaces belonging to this NS */
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struct list *iflist;
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/* Back Pointer to VRF */
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void *vrf_ctxt;
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/* User data */
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void *info;
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};
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RB_HEAD(ns_head, ns);
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RB_PROTOTYPE(ns_head, ns, entry, ns_compare)
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extern struct ns_head ns_tree;
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/*
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* NS hooks
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*/
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#define NS_NEW_HOOK 0 /* a new logical-router is just created */
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#define NS_DELETE_HOOK 1 /* a logical-router is to be deleted */
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#define NS_ENABLE_HOOK 2 /* a logical-router is ready to use */
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#define NS_DISABLE_HOOK 3 /* a logical-router is to be unusable */
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/*
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* Add a specific hook ns module.
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* @param1: hook type
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* @param2: the callback function
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* - param 1: the NS ID
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* - param 2: the address of the user data pointer (the user data
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* can be stored in or freed from there)
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*/
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extern void ns_add_hook(int type, int (*)(struct ns *));
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/*
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* NS initializer/destructor
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*/
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extern void ns_init(void);
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extern void ns_init_zebra(ns_id_t ns_id);
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extern void ns_terminate(void);
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/*
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* NS utilities
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*/
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/* Create a socket serving for the given NS */
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extern int ns_socket(int, int, int, ns_id_t);
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extern void ns_cmd_init(void);
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extern int ns_handler_create(struct vty *vty, struct vrf *vrf,
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char *pathname, ns_id_t ns_id);
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extern char *ns_netns_pathname(struct vty *vty, const char *name);
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extern void *ns_info_lookup(ns_id_t ns_id);
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extern void ns_walk_func(int (*func)(struct ns *));
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extern const char *ns_get_name(struct ns *ns);
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extern ns_id_t ns_get_default_id(void);
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/* API that can be used by all daemons */
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extern int ns_switchback_to_initial(void);
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extern int ns_switch_to_netns(const char *netns_name);
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extern void ns_init(void);
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/* The default NS ID */
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#define NS_DEFAULT ns_get_default_id()
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#endif /*_ZEBRA_NS_H*/
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