3 * Copyright (C) 2014 6WIND S.A.
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; either version 2, or (at your
10 * option) any later version.
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
37 #include "nexthop_group.h"
38 #include "lib_errors.h"
40 /* default VRF ID value used when VRF backend is not NETNS */
41 #define VRF_DEFAULT_INTERNAL 0
42 #define VRF_DEFAULT_NAME_INTERNAL "default"
44 DEFINE_MTYPE_STATIC(LIB
, VRF
, "VRF")
45 DEFINE_MTYPE_STATIC(LIB
, VRF_BITMAP
, "VRF bit-map")
49 static __inline
int vrf_id_compare(const struct vrf
*, const struct vrf
*);
50 static __inline
int vrf_name_compare(const struct vrf
*, const struct vrf
*);
52 RB_GENERATE(vrf_id_head
, vrf
, id_entry
, vrf_id_compare
);
53 RB_GENERATE(vrf_name_head
, vrf
, name_entry
, vrf_name_compare
);
55 struct vrf_id_head vrfs_by_id
= RB_INITIALIZER(&vrfs_by_id
);
56 struct vrf_name_head vrfs_by_name
= RB_INITIALIZER(&vrfs_by_name
);
58 static int vrf_backend
;
59 static int vrf_backend_configured
;
60 static struct zebra_privs_t
*vrf_daemon_privs
;
61 static char vrf_default_name
[VRF_NAMSIZ
] = VRF_DEFAULT_NAME_INTERNAL
;
64 * Turn on/off debug code
67 static int debug_vrf
= 0;
69 /* Holding VRF hooks */
70 static struct vrf_master
{
71 int (*vrf_new_hook
)(struct vrf
*);
72 int (*vrf_delete_hook
)(struct vrf
*);
73 int (*vrf_enable_hook
)(struct vrf
*);
74 int (*vrf_disable_hook
)(struct vrf
*);
75 int (*vrf_update_name_hook
)(struct vrf
*vrf
);
80 static int vrf_is_enabled(struct vrf
*vrf
);
82 /* VRF list existance check by name. */
83 struct vrf
*vrf_lookup_by_name(const char *name
)
86 strlcpy(vrf
.name
, name
, sizeof(vrf
.name
));
87 return (RB_FIND(vrf_name_head
, &vrfs_by_name
, &vrf
));
90 static __inline
int vrf_id_compare(const struct vrf
*a
, const struct vrf
*b
)
92 return (a
->vrf_id
- b
->vrf_id
);
95 static int vrf_name_compare(const struct vrf
*a
, const struct vrf
*b
)
97 return strcmp(a
->name
, b
->name
);
100 /* if ns_id is different and not VRF_UNKNOWN,
101 * then update vrf identifier, and enable VRF
103 static void vrf_update_vrf_id(ns_id_t ns_id
, void *opaqueptr
)
105 ns_id_t vrf_id
= (vrf_id_t
)ns_id
;
107 struct vrf
*vrf
= (struct vrf
*)opaqueptr
;
111 old_vrf_id
= vrf
->vrf_id
;
112 if (vrf_id
== vrf
->vrf_id
)
114 if (vrf
->vrf_id
!= VRF_UNKNOWN
)
115 RB_REMOVE(vrf_id_head
, &vrfs_by_id
, vrf
);
116 vrf
->vrf_id
= vrf_id
;
117 RB_INSERT(vrf_id_head
, &vrfs_by_id
, vrf
);
118 if (old_vrf_id
== VRF_UNKNOWN
)
119 vrf_enable((struct vrf
*)vrf
);
122 int vrf_switch_to_netns(vrf_id_t vrf_id
)
125 struct vrf
*vrf
= vrf_lookup_by_id(vrf_id
);
127 /* VRF is default VRF. silently ignore */
128 if (!vrf
|| vrf
->vrf_id
== VRF_DEFAULT
)
129 return 1; /* 1 = default */
130 /* VRF has no NETNS backend. silently ignore */
131 if (vrf
->data
.l
.netns_name
[0] == '\0')
132 return 2; /* 2 = no netns */
133 name
= ns_netns_pathname(NULL
, vrf
->data
.l
.netns_name
);
135 zlog_debug("VRF_SWITCH: %s(%u)", name
, vrf
->vrf_id
);
136 return ns_switch_to_netns(name
);
139 int vrf_switchback_to_initial(void)
141 int ret
= ns_switchback_to_initial();
143 if (ret
== 0 && debug_vrf
)
144 zlog_debug("VRF_SWITCHBACK");
148 /* Get a VRF. If not found, create one.
150 * name - The name of the vrf. May be NULL if unknown.
151 * vrf_id - The vrf_id of the vrf. May be VRF_UNKNOWN if unknown
152 * Description: Please note that this routine can be called with just the name
155 struct vrf
*vrf_get(vrf_id_t vrf_id
, const char *name
)
157 struct vrf
*vrf
= NULL
;
161 zlog_debug("VRF_GET: %s(%u)", name
== NULL
? "(NULL)" : name
,
164 /* Nothing to see, move along here */
165 if (!name
&& vrf_id
== VRF_UNKNOWN
)
168 /* attempt to find already available VRF
171 vrf
= vrf_lookup_by_name(name
);
172 if (vrf
&& vrf_id
!= VRF_UNKNOWN
173 && vrf
->vrf_id
!= VRF_UNKNOWN
174 && vrf
->vrf_id
!= vrf_id
) {
175 zlog_debug("VRF_GET: avoid %s creation(%u), same name exists (%u)",
176 name
, vrf_id
, vrf
->vrf_id
);
179 /* Try to find VRF both by ID and name */
180 if (!vrf
&& vrf_id
!= VRF_UNKNOWN
)
181 vrf
= vrf_lookup_by_id(vrf_id
);
184 vrf
= XCALLOC(MTYPE_VRF
, sizeof(struct vrf
));
185 vrf
->vrf_id
= VRF_UNKNOWN
;
190 zlog_debug("VRF(%u) %s is created.", vrf_id
,
191 (name
) ? name
: "(NULL)");
195 if (vrf_id
!= VRF_UNKNOWN
&& vrf
->vrf_id
== VRF_UNKNOWN
) {
196 vrf
->vrf_id
= vrf_id
;
197 RB_INSERT(vrf_id_head
, &vrfs_by_id
, vrf
);
201 if (name
&& vrf
->name
[0] != '\0' && strcmp(name
, vrf
->name
)) {
202 /* update the vrf name */
203 RB_REMOVE(vrf_name_head
, &vrfs_by_name
, vrf
);
204 strlcpy(vrf
->data
.l
.netns_name
,
206 strlcpy(vrf
->name
, name
, sizeof(vrf
->name
));
207 RB_INSERT(vrf_name_head
, &vrfs_by_name
, vrf
);
208 if (vrf
->vrf_id
== VRF_DEFAULT
)
209 vrf_set_default_name(vrf
->name
, false);
210 } else if (name
&& vrf
->name
[0] == '\0') {
211 strlcpy(vrf
->name
, name
, sizeof(vrf
->name
));
212 RB_INSERT(vrf_name_head
, &vrfs_by_name
, vrf
);
214 if (new &&vrf_master
.vrf_new_hook
)
215 (*vrf_master
.vrf_new_hook
)(vrf
);
220 /* Delete a VRF. This is called when the underlying VRF goes away, a
221 * pre-configured VRF is deleted or when shutting down (vrf_terminate()).
223 void vrf_delete(struct vrf
*vrf
)
226 zlog_debug("VRF %u is to be deleted.", vrf
->vrf_id
);
228 if (vrf_is_enabled(vrf
))
231 /* If the VRF is user configured, it'll stick around, just remove
232 * the ID mapping. Interfaces assigned to this VRF should've been
233 * removed already as part of the VRF going down.
235 if (vrf_is_user_cfged(vrf
)) {
236 if (vrf
->vrf_id
!= VRF_UNKNOWN
) {
237 /* Delete any VRF interfaces - should be only
238 * the VRF itself, other interfaces should've
239 * been moved out of the VRF.
242 RB_REMOVE(vrf_id_head
, &vrfs_by_id
, vrf
);
243 vrf
->vrf_id
= VRF_UNKNOWN
;
248 if (vrf_master
.vrf_delete_hook
)
249 (*vrf_master
.vrf_delete_hook
)(vrf
);
254 if (vrf
->vrf_id
!= VRF_UNKNOWN
)
255 RB_REMOVE(vrf_id_head
, &vrfs_by_id
, vrf
);
256 if (vrf
->name
[0] != '\0')
257 RB_REMOVE(vrf_name_head
, &vrfs_by_name
, vrf
);
259 XFREE(MTYPE_VRF
, vrf
);
262 /* Look up a VRF by identifier. */
263 struct vrf
*vrf_lookup_by_id(vrf_id_t vrf_id
)
267 return (RB_FIND(vrf_id_head
, &vrfs_by_id
, &vrf
));
271 * Enable a VRF - that is, let the VRF be ready to use.
272 * The VRF_ENABLE_HOOK callback will be called to inform
273 * that they can allocate resources in this VRF.
275 * RETURN: 1 - enabled successfully; otherwise, 0.
277 int vrf_enable(struct vrf
*vrf
)
279 if (vrf_is_enabled(vrf
))
283 zlog_debug("VRF %u is enabled.", vrf
->vrf_id
);
285 SET_FLAG(vrf
->status
, VRF_ACTIVE
);
287 if (vrf_master
.vrf_enable_hook
)
288 (*vrf_master
.vrf_enable_hook
)(vrf
);
291 * If we have any nexthop group entries that
292 * are awaiting vrf initialization then
293 * let's let people know about it
295 nexthop_group_enable_vrf(vrf
);
301 * Disable a VRF - that is, let the VRF be unusable.
302 * The VRF_DELETE_HOOK callback will be called to inform
303 * that they must release the resources in the VRF.
305 void vrf_disable(struct vrf
*vrf
)
307 if (!vrf_is_enabled(vrf
))
310 UNSET_FLAG(vrf
->status
, VRF_ACTIVE
);
313 zlog_debug("VRF %u is to be disabled.", vrf
->vrf_id
);
315 /* Till now, nothing to be done for the default VRF. */
316 // Pending: see why this statement.
318 if (vrf_master
.vrf_disable_hook
)
319 (*vrf_master
.vrf_disable_hook
)(vrf
);
322 const char *vrf_id_to_name(vrf_id_t vrf_id
)
326 vrf
= vrf_lookup_by_id(vrf_id
);
333 vrf_id_t
vrf_name_to_id(const char *name
)
336 vrf_id_t vrf_id
= VRF_DEFAULT
; // Pending: need a way to return invalid
337 // id/ routine not used.
341 vrf
= vrf_lookup_by_name(name
);
343 vrf_id
= vrf
->vrf_id
;
348 /* Get the data pointer of the specified VRF. If not found, create one. */
349 void *vrf_info_get(vrf_id_t vrf_id
)
351 struct vrf
*vrf
= vrf_get(vrf_id
, NULL
);
355 /* Look up the data pointer of the specified VRF. */
356 void *vrf_info_lookup(vrf_id_t vrf_id
)
358 struct vrf
*vrf
= vrf_lookup_by_id(vrf_id
);
359 return vrf
? vrf
->info
: NULL
;
363 * VRF hash for storing set or not.
370 static unsigned int vrf_hash_bitmap_key(const void *data
)
372 const struct vrf_bit_set
*bit
= data
;
377 static bool vrf_hash_bitmap_cmp(const void *a
, const void *b
)
379 const struct vrf_bit_set
*bit1
= a
;
380 const struct vrf_bit_set
*bit2
= b
;
382 return bit1
->vrf_id
== bit2
->vrf_id
;
385 static void *vrf_hash_bitmap_alloc(void *data
)
387 struct vrf_bit_set
*copy
= data
;
388 struct vrf_bit_set
*bit
;
390 bit
= XMALLOC(MTYPE_VRF_BITMAP
, sizeof(*bit
));
391 bit
->vrf_id
= copy
->vrf_id
;
396 static void vrf_hash_bitmap_free(void *data
)
398 struct vrf_bit_set
*bit
= data
;
400 XFREE(MTYPE_VRF_BITMAP
, bit
);
403 vrf_bitmap_t
vrf_bitmap_init(void)
405 return hash_create_size(32, vrf_hash_bitmap_key
, vrf_hash_bitmap_cmp
,
409 void vrf_bitmap_free(vrf_bitmap_t bmap
)
411 struct hash
*vrf_hash
= bmap
;
413 if (vrf_hash
== NULL
)
416 hash_clean(vrf_hash
, vrf_hash_bitmap_free
);
420 void vrf_bitmap_set(vrf_bitmap_t bmap
, vrf_id_t vrf_id
)
422 struct vrf_bit_set lookup
= { .vrf_id
= vrf_id
};
423 struct hash
*vrf_hash
= bmap
;
424 struct vrf_bit_set
*bit
;
426 if (vrf_hash
== NULL
|| vrf_id
== VRF_UNKNOWN
)
429 bit
= hash_get(vrf_hash
, &lookup
, vrf_hash_bitmap_alloc
);
433 void vrf_bitmap_unset(vrf_bitmap_t bmap
, vrf_id_t vrf_id
)
435 struct vrf_bit_set lookup
= { .vrf_id
= vrf_id
};
436 struct hash
*vrf_hash
= bmap
;
437 struct vrf_bit_set
*bit
;
439 if (vrf_hash
== NULL
|| vrf_id
== VRF_UNKNOWN
)
442 bit
= hash_get(vrf_hash
, &lookup
, vrf_hash_bitmap_alloc
);
446 int vrf_bitmap_check(vrf_bitmap_t bmap
, vrf_id_t vrf_id
)
448 struct vrf_bit_set lookup
= { .vrf_id
= vrf_id
};
449 struct hash
*vrf_hash
= bmap
;
450 struct vrf_bit_set
*bit
;
452 if (vrf_hash
== NULL
|| vrf_id
== VRF_UNKNOWN
)
455 bit
= hash_lookup(vrf_hash
, &lookup
);
462 static void vrf_autocomplete(vector comps
, struct cmd_token
*token
)
464 struct vrf
*vrf
= NULL
;
466 RB_FOREACH (vrf
, vrf_name_head
, &vrfs_by_name
)
467 vector_set(comps
, XSTRDUP(MTYPE_COMPLETION
, vrf
->name
));
470 static const struct cmd_variable_handler vrf_var_handlers
[] = {
473 .completions
= vrf_autocomplete
,
476 .varname
= "vrf_name",
477 .completions
= vrf_autocomplete
,
480 .varname
= "nexthop_vrf",
481 .completions
= vrf_autocomplete
,
483 {.completions
= NULL
},
486 /* Initialize VRF module. */
487 void vrf_init(int (*create
)(struct vrf
*), int (*enable
)(struct vrf
*),
488 int (*disable
)(struct vrf
*), int (*destroy
)(struct vrf
*),
489 int ((*update
)(struct vrf
*)))
491 struct vrf
*default_vrf
;
493 /* initialise NS, in case VRF backend if NETNS */
496 zlog_debug("%s: Initializing VRF subsystem", __func__
);
498 vrf_master
.vrf_new_hook
= create
;
499 vrf_master
.vrf_enable_hook
= enable
;
500 vrf_master
.vrf_disable_hook
= disable
;
501 vrf_master
.vrf_delete_hook
= destroy
;
502 vrf_master
.vrf_update_name_hook
= update
;
504 /* The default VRF always exists. */
505 default_vrf
= vrf_get(VRF_DEFAULT
, VRF_DEFAULT_NAME
);
507 flog_err(EC_LIB_VRF_START
,
508 "vrf_init: failed to create the default VRF!");
511 if (vrf_is_backend_netns()) {
514 strlcpy(default_vrf
->data
.l
.netns_name
,
515 VRF_DEFAULT_NAME
, NS_NAMSIZ
);
516 ns
= ns_lookup(ns_get_default_id());
517 ns
->vrf_ctxt
= default_vrf
;
518 default_vrf
->ns_ctxt
= ns
;
521 /* Enable the default VRF. */
522 if (!vrf_enable(default_vrf
)) {
523 flog_err(EC_LIB_VRF_START
,
524 "vrf_init: failed to enable the default VRF!");
528 cmd_variable_handler_register(vrf_var_handlers
);
531 /* Terminate VRF module. */
532 void vrf_terminate(void)
537 zlog_debug("%s: Shutting down vrf subsystem", __func__
);
539 while (!RB_EMPTY(vrf_id_head
, &vrfs_by_id
)) {
540 vrf
= RB_ROOT(vrf_id_head
, &vrfs_by_id
);
542 /* Clear configured flag and invoke delete. */
543 UNSET_FLAG(vrf
->status
, VRF_CONFIGURED
);
547 while (!RB_EMPTY(vrf_name_head
, &vrfs_by_name
)) {
548 vrf
= RB_ROOT(vrf_name_head
, &vrfs_by_name
);
550 /* Clear configured flag and invoke delete. */
551 UNSET_FLAG(vrf
->status
, VRF_CONFIGURED
);
556 int vrf_socket(int domain
, int type
, int protocol
, vrf_id_t vrf_id
,
557 const char *interfacename
)
559 int ret
, save_errno
, ret2
;
561 ret
= vrf_switch_to_netns(vrf_id
);
563 flog_err_sys(EC_LIB_SOCKET
, "%s: Can't switch to VRF %u (%s)",
564 __func__
, vrf_id
, safe_strerror(errno
));
566 ret
= socket(domain
, type
, protocol
);
568 ret2
= vrf_switchback_to_initial();
570 flog_err_sys(EC_LIB_SOCKET
,
571 "%s: Can't switchback from VRF %u (%s)", __func__
,
572 vrf_id
, safe_strerror(errno
));
576 ret2
= vrf_bind(vrf_id
, ret
, interfacename
);
584 int vrf_is_backend_netns(void)
586 return (vrf_backend
== VRF_BACKEND_NETNS
);
589 int vrf_get_backend(void)
591 if (!vrf_backend_configured
)
592 return VRF_BACKEND_UNKNOWN
;
596 void vrf_configure_backend(int vrf_backend_netns
)
598 vrf_backend
= vrf_backend_netns
;
599 vrf_backend_configured
= 1;
602 int vrf_handler_create(struct vty
*vty
, const char *vrfname
,
607 if (strlen(vrfname
) > VRF_NAMSIZ
) {
610 "%% VRF name %s invalid: length exceeds %d bytes\n",
611 vrfname
, VRF_NAMSIZ
);
615 "%% VRF name %s invalid: length exceeds %d bytes\n",
616 vrfname
, VRF_NAMSIZ
);
617 return CMD_WARNING_CONFIG_FAILED
;
620 vrfp
= vrf_get(VRF_UNKNOWN
, vrfname
);
623 VTY_PUSH_CONTEXT(VRF_NODE
, vrfp
);
630 int vrf_netns_handler_create(struct vty
*vty
, struct vrf
*vrf
, char *pathname
,
631 ns_id_t ns_id
, ns_id_t internal_ns_id
)
633 struct ns
*ns
= NULL
;
636 return CMD_WARNING_CONFIG_FAILED
;
637 if (vrf
->vrf_id
!= VRF_UNKNOWN
&& vrf
->ns_ctxt
== NULL
) {
640 "VRF %u is already configured with VRF %s\n",
641 vrf
->vrf_id
, vrf
->name
);
643 zlog_info("VRF %u is already configured with VRF %s",
644 vrf
->vrf_id
, vrf
->name
);
645 return CMD_WARNING_CONFIG_FAILED
;
647 if (vrf
->ns_ctxt
!= NULL
) {
648 ns
= (struct ns
*)vrf
->ns_ctxt
;
649 if (!strcmp(ns
->name
, pathname
)) {
652 "VRF %u already configured with NETNS %s\n",
653 vrf
->vrf_id
, ns
->name
);
656 "VRF %u already configured with NETNS %s",
657 vrf
->vrf_id
, ns
->name
);
658 return CMD_WARNING_CONFIG_FAILED
;
661 ns
= ns_lookup_name(pathname
);
662 if (ns
&& ns
->vrf_ctxt
) {
663 struct vrf
*vrf2
= (struct vrf
*)ns
->vrf_ctxt
;
669 "NS %s is already configured"
670 " with VRF %u(%s)\n",
671 ns
->name
, vrf2
->vrf_id
, vrf2
->name
);
673 zlog_info("NS %s is already configured with VRF %u(%s)",
674 ns
->name
, vrf2
->vrf_id
, vrf2
->name
);
675 return CMD_WARNING_CONFIG_FAILED
;
677 ns
= ns_get_created(ns
, pathname
, ns_id
);
678 ns
->internal_ns_id
= internal_ns_id
;
679 ns
->vrf_ctxt
= (void *)vrf
;
680 vrf
->ns_ctxt
= (void *)ns
;
681 /* update VRF netns NAME */
682 strlcpy(vrf
->data
.l
.netns_name
, basename(pathname
), NS_NAMSIZ
);
684 if (!ns_enable(ns
, vrf_update_vrf_id
)) {
686 vty_out(vty
, "Can not associate NS %u with NETNS %s\n",
687 ns
->ns_id
, ns
->name
);
689 zlog_info("Can not associate NS %u with NETNS %s",
690 ns
->ns_id
, ns
->name
);
691 return CMD_WARNING_CONFIG_FAILED
;
697 /* vrf CLI commands */
701 "Exit current mode and down to previous mode\n")
703 /* We have to set vrf context to default vrf */
704 VTY_PUSH_CONTEXT(VRF_NODE
, vrf_get(VRF_DEFAULT
, VRF_DEFAULT_NAME
));
705 vty
->node
= CONFIG_NODE
;
712 "Select a VRF to configure\n"
716 const char *vrfname
= argv
[idx_name
]->arg
;
718 return vrf_handler_create(vty
, vrfname
, NULL
);
725 "Delete a pseudo VRF's configuration\n"
728 const char *vrfname
= argv
[2]->arg
;
732 vrfp
= vrf_lookup_by_name(vrfname
);
735 vty_out(vty
, "%% VRF %s does not exist\n", vrfname
);
736 return CMD_WARNING_CONFIG_FAILED
;
739 if (CHECK_FLAG(vrfp
->status
, VRF_ACTIVE
)) {
740 vty_out(vty
, "%% Only inactive VRFs can be deleted\n");
741 return CMD_WARNING_CONFIG_FAILED
;
744 /* Clear configured flag and invoke delete. */
745 UNSET_FLAG(vrfp
->status
, VRF_CONFIGURED
);
752 static struct cmd_node vrf_node
= {VRF_NODE
, "%s(config-vrf)# ", 1};
754 DEFUN_NOSH (vrf_netns
,
757 "Attach VRF to a Namespace\n"
758 "The file name in " NS_RUN_DIR
", or a full pathname\n")
760 int idx_name
= 1, ret
;
761 char *pathname
= ns_netns_pathname(vty
, argv
[idx_name
]->arg
);
763 VTY_DECLVAR_CONTEXT(vrf
, vrf
);
766 return CMD_WARNING_CONFIG_FAILED
;
768 frr_with_privs(vrf_daemon_privs
) {
769 ret
= vrf_netns_handler_create(vty
, vrf
, pathname
,
770 NS_UNKNOWN
, NS_UNKNOWN
);
775 DEFUN_NOSH (no_vrf_netns
,
779 "Detach VRF from a Namespace\n"
780 "The file name in " NS_RUN_DIR
", or a full pathname\n")
782 struct ns
*ns
= NULL
;
784 VTY_DECLVAR_CONTEXT(vrf
, vrf
);
786 if (!vrf_is_backend_netns()) {
787 vty_out(vty
, "VRF backend is not Netns. Aborting\n");
788 return CMD_WARNING_CONFIG_FAILED
;
791 vty_out(vty
, "VRF %s(%u) is not configured with NetNS\n",
792 vrf
->name
, vrf
->vrf_id
);
793 return CMD_WARNING_CONFIG_FAILED
;
796 ns
= (struct ns
*)vrf
->ns_ctxt
;
800 /* vrf ID from VRF is necessary for Zebra
801 * so that propagate to other clients is done
809 * Debug CLI for vrf's
834 static int vrf_write_host(struct vty
*vty
)
837 vty_out(vty
, "debug vrf\n");
842 static struct cmd_node vrf_debug_node
= {VRF_DEBUG_NODE
, "", 1};
844 void vrf_install_commands(void)
846 install_node(&vrf_debug_node
, vrf_write_host
);
848 install_element(CONFIG_NODE
, &vrf_debug_cmd
);
849 install_element(ENABLE_NODE
, &vrf_debug_cmd
);
850 install_element(CONFIG_NODE
, &no_vrf_debug_cmd
);
851 install_element(ENABLE_NODE
, &no_vrf_debug_cmd
);
854 void vrf_cmd_init(int (*writefunc
)(struct vty
*vty
),
855 struct zebra_privs_t
*daemon_privs
)
857 install_element(CONFIG_NODE
, &vrf_cmd
);
858 install_element(CONFIG_NODE
, &no_vrf_cmd
);
859 install_node(&vrf_node
, writefunc
);
860 install_default(VRF_NODE
);
861 install_element(VRF_NODE
, &vrf_exit_cmd
);
862 if (vrf_is_backend_netns() && ns_have_netns()) {
863 /* Install NS commands. */
864 vrf_daemon_privs
= daemon_privs
;
865 install_element(VRF_NODE
, &vrf_netns_cmd
);
866 install_element(VRF_NODE
, &no_vrf_netns_cmd
);
870 void vrf_set_default_name(const char *default_name
, bool force
)
873 static bool def_vrf_forced
;
875 def_vrf
= vrf_lookup_by_id(VRF_DEFAULT
);
876 assert(default_name
);
877 if (def_vrf
&& !force
&& def_vrf_forced
) {
878 zlog_debug("VRF: %s, avoid changing name to %s, previously forced (%u)",
879 def_vrf
->name
, default_name
,
883 if (strmatch(vrf_default_name
, default_name
))
885 snprintf(vrf_default_name
, VRF_NAMSIZ
, "%s", default_name
);
888 def_vrf_forced
= true;
889 RB_REMOVE(vrf_name_head
, &vrfs_by_name
, def_vrf
);
890 strlcpy(def_vrf
->data
.l
.netns_name
,
891 vrf_default_name
, NS_NAMSIZ
);
892 strlcpy(def_vrf
->name
, vrf_default_name
, sizeof(def_vrf
->name
));
893 RB_INSERT(vrf_name_head
, &vrfs_by_name
, def_vrf
);
894 if (vrf_master
.vrf_update_name_hook
)
895 (*vrf_master
.vrf_update_name_hook
)(def_vrf
);
899 const char *vrf_get_default_name(void)
901 return vrf_default_name
;
904 vrf_id_t
vrf_get_default_id(void)
906 /* backend netns is only known by zebra
907 * for other daemons, we return VRF_DEFAULT_INTERNAL
909 if (vrf_is_backend_netns())
910 return ns_get_default_id();
912 return VRF_DEFAULT_INTERNAL
;
915 int vrf_bind(vrf_id_t vrf_id
, int fd
, const char *name
)
918 struct interface
*ifp
;
920 if (fd
< 0 || name
== NULL
)
922 /* the device should exist
923 * otherwise we should return
924 * case ifname = vrf in netns mode => return
926 ifp
= if_lookup_by_name(name
, vrf_id
);
929 #ifdef SO_BINDTODEVICE
930 ret
= setsockopt(fd
, SOL_SOCKET
, SO_BINDTODEVICE
, name
, strlen(name
)+1);
932 zlog_debug("bind to interface %s failed, errno=%d", name
,
934 #endif /* SO_BINDTODEVICE */
937 int vrf_getaddrinfo(const char *node
, const char *service
,
938 const struct addrinfo
*hints
, struct addrinfo
**res
,
941 int ret
, ret2
, save_errno
;
943 ret
= vrf_switch_to_netns(vrf_id
);
945 flog_err_sys(EC_LIB_SOCKET
, "%s: Can't switch to VRF %u (%s)",
946 __func__
, vrf_id
, safe_strerror(errno
));
947 ret
= getaddrinfo(node
, service
, hints
, res
);
949 ret2
= vrf_switchback_to_initial();
951 flog_err_sys(EC_LIB_SOCKET
,
952 "%s: Can't switchback from VRF %u (%s)", __func__
,
953 vrf_id
, safe_strerror(errno
));
958 int vrf_ioctl(vrf_id_t vrf_id
, int d
, unsigned long request
, char *params
)
960 int ret
, saved_errno
, rc
;
962 ret
= vrf_switch_to_netns(vrf_id
);
964 flog_err_sys(EC_LIB_SOCKET
, "%s: Can't switch to VRF %u (%s)",
965 __func__
, vrf_id
, safe_strerror(errno
));
968 rc
= ioctl(d
, request
, params
);
970 ret
= vrf_switchback_to_initial();
972 flog_err_sys(EC_LIB_SOCKET
,
973 "%s: Can't switchback from VRF %u (%s)", __func__
,
974 vrf_id
, safe_strerror(errno
));
979 int vrf_sockunion_socket(const union sockunion
*su
, vrf_id_t vrf_id
,
980 const char *interfacename
)
982 int ret
, save_errno
, ret2
;
984 ret
= vrf_switch_to_netns(vrf_id
);
986 flog_err_sys(EC_LIB_SOCKET
, "%s: Can't switch to VRF %u (%s)",
987 __func__
, vrf_id
, safe_strerror(errno
));
988 ret
= sockunion_socket(su
);
990 ret2
= vrf_switchback_to_initial();
992 flog_err_sys(EC_LIB_SOCKET
,
993 "%s: Can't switchback from VRF %u (%s)", __func__
,
994 vrf_id
, safe_strerror(errno
));
999 ret2
= vrf_bind(vrf_id
, ret
, interfacename
);
1007 vrf_id_t
vrf_generate_id(void)
1009 static int vrf_id_local
;
1011 return ++vrf_id_local
;