[mirror_frr.git] / lib / vrf.h

/*
 * VRF related header.
 * Copyright (C) 2014 6WIND S.A.
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * GNU Zebra is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; see the file COPYING; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef _ZEBRA_VRF_H
#define _ZEBRA_VRF_H

#include "openbsd-tree.h"
#include "linklist.h"
#include "qobj.h"
#include "vty.h"
#include "ns.h"

/* The default VRF ID */
#define VRF_UNKNOWN UINT32_MAX

/* Pending: May need to refine this. */
#ifndef IFLA_VRF_MAX
enum { IFLA_VRF_UNSPEC, IFLA_VRF_TABLE, __IFLA_VRF_MAX };

#define IFLA_VRF_MAX (__IFLA_VRF_MAX - 1)
#endif

#define VRF_NAMSIZ      36
#define NS_NAMSIZ       16

/*
 * The command strings
 */
#define VRF_CMD_HELP_STR    "Specify the VRF\nThe VRF name\n"
#define VRF_ALL_CMD_HELP_STR    "Specify the VRF\nAll VRFs\n"
#define VRF_FULL_CMD_HELP_STR   "Specify the VRF\nThe VRF name\nAll VRFs\n"

/*
 * Pass some OS specific data up through
 * to the daemons
 */
struct vrf_data {
	union {
		struct {
			uint32_t table_id;
			char netns_name[NS_NAMSIZ];
		} l;
	};
};

struct vrf {
	RB_ENTRY(vrf) id_entry, name_entry;

	/* Identifier, same as the vector index */
	vrf_id_t vrf_id;

	/* Name */
	char name[VRF_NAMSIZ + 1];

	/* Zebra internal VRF status */
	uint8_t status;
#define VRF_ACTIVE     (1 << 0) /* VRF is up in kernel */
#define VRF_CONFIGURED (1 << 1) /* VRF has some FRR configuration */

	/* Interfaces belonging to this VRF */
	struct if_name_head ifaces_by_name;
	struct if_index_head ifaces_by_index;

	/* User data */
	void *info;

	/* The table_id from the kernel */
	struct vrf_data data;

	/* Back pointer to namespace context */
	void *ns_ctxt;

	QOBJ_FIELDS
};
RB_HEAD(vrf_id_head, vrf);
RB_PROTOTYPE(vrf_id_head, vrf, id_entry, vrf_id_compare)
RB_HEAD(vrf_name_head, vrf);
RB_PROTOTYPE(vrf_name_head, vrf, name_entry, vrf_name_compare)
DECLARE_QOBJ_TYPE(vrf)

/* Allow VRF with netns as backend */
#define VRF_BACKEND_VRF_LITE 0
#define VRF_BACKEND_NETNS    1

extern struct vrf_id_head vrfs_by_id;
extern struct vrf_name_head vrfs_by_name;

extern struct vrf *vrf_lookup_by_id(vrf_id_t);
extern struct vrf *vrf_lookup_by_name(const char *);
extern struct vrf *vrf_get(vrf_id_t, const char *);
extern const char *vrf_id_to_name(vrf_id_t vrf_id);
extern vrf_id_t vrf_name_to_id(const char *);

#define VRF_GET_ID(V, NAME, USE_JSON)                                          \
	do {                                                                   \
		struct vrf *_vrf;                                              \
		if (!(_vrf = vrf_lookup_by_name(NAME))) {                      \
			if (USE_JSON) {                                        \
				vty_out(vty, "{}\n");                          \
			} else {                                               \
				vty_out(vty, "%% VRF %s not found\n", NAME);   \
			}                                                      \
			return CMD_WARNING;                                    \
		}                                                              \
		if (_vrf->vrf_id == VRF_UNKNOWN) {                             \
			if (USE_JSON) {                                        \
				vty_out(vty, "{}\n");                          \
			} else {                                               \
				vty_out(vty, "%% VRF %s not active\n", NAME);  \
			}                                                      \
			return CMD_WARNING;                                    \
		}                                                              \
		(V) = _vrf->vrf_id;                                            \
	} while (0)

/*
 * Check whether the VRF is enabled.
 */
static inline int vrf_is_enabled(struct vrf *vrf)
{
	return vrf && CHECK_FLAG(vrf->status, VRF_ACTIVE);
}

/* check if the vrf is user configured */
static inline int vrf_is_user_cfged(struct vrf *vrf)
{
	return vrf && CHECK_FLAG(vrf->status, VRF_CONFIGURED);
}

/* Mark that VRF has user configuration */
static inline void vrf_set_user_cfged(struct vrf *vrf)
{
	SET_FLAG(vrf->status, VRF_CONFIGURED);
}

/* Mark that VRF no longer has any user configuration */
static inline void vrf_reset_user_cfged(struct vrf *vrf)
{
	UNSET_FLAG(vrf->status, VRF_CONFIGURED);
}

/*
 * Utilities to obtain the user data
 */

/* Get the data pointer of the specified VRF. If not found, create one. */
extern void *vrf_info_get(vrf_id_t);
/* Look up the data pointer of the specified VRF. */
extern void *vrf_info_lookup(vrf_id_t);

/*
 * VRF bit-map: maintaining flags, one bit per VRF ID
 */

typedef void *vrf_bitmap_t;
#define VRF_BITMAP_NULL     NULL

extern vrf_bitmap_t vrf_bitmap_init(void);
extern void vrf_bitmap_free(vrf_bitmap_t);
extern void vrf_bitmap_set(vrf_bitmap_t, vrf_id_t);
extern void vrf_bitmap_unset(vrf_bitmap_t, vrf_id_t);
extern int vrf_bitmap_check(vrf_bitmap_t, vrf_id_t);

/*
 * VRF initializer/destructor
 *
 * create -> Called back when a new VRF is created.  This
 *           can be either through these 3 options:
 *           1) CLI mentions a vrf before OS knows about it
 *           2) OS calls zebra and we create the vrf from OS
 *              callback
 *           3) zebra calls individual protocols to notify
 *              about the new vrf
 *
 * enable -> Called back when a VRF is actually usable from
 *           an OS perspective ( 2 and 3 above )
 *
 * disable -> Called back when a VRF is being deleted from
 *            the system ( 2 and 3 ) above
 *
 * delete -> Called back when a vrf is being deleted from
 *           the system ( 2 and 3 ) above.
 */
extern void vrf_init(int (*create)(struct vrf *vrf), int (*enable)(struct vrf *vrf),
		     int (*disable)(struct vrf *vrf), int (*delete)(struct vrf *vrf),
		     int (*update)(struct vrf *vrf));

/*
 * Call vrf_terminate when the protocol is being shutdown
 */
extern void vrf_terminate(void);

/*
 * Utilities to create networks objects,
 * or call network operations
 */

/* Create a socket serving for the given VRF */
extern int vrf_socket(int domain, int type, int protocol, vrf_id_t vrf_id,
		      char *name);

extern int vrf_sockunion_socket(const union sockunion *su, vrf_id_t vrf_id,
				char *name);

extern int vrf_bind(vrf_id_t vrf_id, int fd, char *name);

/* VRF ioctl operations */
extern int vrf_getaddrinfo(const char *node, const char *service,
			   const struct addrinfo *hints, struct addrinfo **res,
			   vrf_id_t vrf_id);

extern int vrf_ioctl(vrf_id_t vrf_id, int d, unsigned long request, char *args);

/* function called by macro VRF_DEFAULT
 * to get the default VRF_ID
 */
extern vrf_id_t vrf_get_default_id(void);
/* The default VRF ID */
#define VRF_DEFAULT vrf_get_default_id()

extern void vrf_set_default_name(const char *default_name, bool force);
extern const char *vrf_get_default_name(void);
#define VRF_DEFAULT_NAME    vrf_get_default_name()

/* VRF is mapped on netns or not ? */
int vrf_is_mapped_on_netns(struct vrf *vrf);

/* VRF switch from NETNS */
extern int vrf_switch_to_netns(vrf_id_t vrf_id);
extern int vrf_switchback_to_initial(void);

/*
 * VRF backend routines
 * should be called from zebra only
 */

/* VRF vty command initialisation
 */
extern void vrf_cmd_init(int (*writefunc)(struct vty *vty),
			 struct zebra_privs_t *daemon_priv);

/* VRF vty debugging
 */
extern void vrf_install_commands(void);

/*
 * VRF utilities
 */

/* API for configuring VRF backend
 * should be called from zebra only
 */
extern void vrf_configure_backend(int vrf_backend_netns);
extern int vrf_get_backend(void);
extern int vrf_is_backend_netns(void);


/* API to create a VRF. either from vty
 * or through discovery
 */
extern int vrf_handler_create(struct vty *vty, const char *name,
			      struct vrf **vrf);

/* API to associate a VRF with a NETNS.
 * called either from vty or through discovery
 * should be called from zebra only
 */
extern int vrf_netns_handler_create(struct vty *vty, struct vrf *vrf,
				    char *pathname, ns_id_t ext_ns_id,
				    ns_id_t ns_id);

/* used internally to enable or disable VRF.
 * Notify a change in the VRF ID of the VRF
 */
extern void vrf_disable(struct vrf *vrf);
extern int vrf_enable(struct vrf *vrf);
extern void vrf_delete(struct vrf *vrf);
extern vrf_id_t vrf_generate_id(void);

#endif /*_ZEBRA_VRF_H*/
Commit	Line	Data
b72ede27 FL	1	/*
	2	* VRF related header.
	3	* Copyright (C) 2014 6WIND S.A.
	4	*
	5	* This file is part of GNU Zebra.
	6	*
	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.
	11	*
	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.
	16	*
896014f4 DL	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
b72ede27 FL	20	*/
	21
	22	#ifndef _ZEBRA_VRF_H
	23	#define _ZEBRA_VRF_H
	24
1a1a7065	25	#include "openbsd-tree.h"
8736158a	26	#include "linklist.h"
e80e7cce	27	#include "qobj.h"
7ddcfca4	28	#include "vty.h"
e26aedbe	29	#include "ns.h"
8736158a	30
b72ede27	31	/* The default VRF ID */
a9ff90c4	32	#define VRF_UNKNOWN UINT32_MAX
b72ede27	33
216b18ef DS	34	/* Pending: May need to refine this. */
216b18ef DS	35	#ifndef IFLA_VRF_MAX
d62a17ae	36	enum { IFLA_VRF_UNSPEC, IFLA_VRF_TABLE, __IFLA_VRF_MAX };
216b18ef DS	37
	38	#define IFLA_VRF_MAX (__IFLA_VRF_MAX - 1)
	39	#endif
	40
	41	#define VRF_NAMSIZ 36
4691b65a	42	#define NS_NAMSIZ 16
216b18ef	43
8736158a FL	44	/*
	45	* The command strings
	46	*/
216b18ef	47	#define VRF_CMD_HELP_STR "Specify the VRF\nThe VRF name\n"
8736158a	48	#define VRF_ALL_CMD_HELP_STR "Specify the VRF\nAll VRFs\n"
ecffa493	49	#define VRF_FULL_CMD_HELP_STR "Specify the VRF\nThe VRF name\nAll VRFs\n"
8736158a	50
1da29456 DS	51	/*
	52	* Pass some OS specific data up through
	53	* to the daemons
	54	*/
d62a17ae	55	struct vrf_data {
	56	union {
	57	struct {
	58	uint32_t table_id;
4691b65a	59	char netns_name[NS_NAMSIZ];
d62a17ae	60	} l;
d62a17ae	61	};
1da29456 DS	62	};
1da29456 DS	63
d62a17ae	64	struct vrf {
d62a17ae	65	RB_ENTRY(vrf) id_entry, name_entry;
1a1a7065	66
d62a17ae	67	/* Identifier, same as the vector index */
d62a17ae	68	vrf_id_t vrf_id;
216b18ef	69
d62a17ae	70	/* Name */
d62a17ae	71	char name[VRF_NAMSIZ + 1];
216b18ef	72
d62a17ae	73	/* Zebra internal VRF status */
d7c0a89a	74	uint8_t status;
84915b0a	75	#define VRF_ACTIVE (1 << 0) /* VRF is up in kernel */
22bd3e94	76	#define VRF_CONFIGURED (1 << 1) /* VRF has some FRR configuration */
216b18ef	77
f4e14fdb RW	78	/* Interfaces belonging to this VRF */
f4e14fdb RW	79	struct if_name_head ifaces_by_name;
ff880b78	80	struct if_index_head ifaces_by_index;
216b18ef	81
d62a17ae	82	/* User data */
d62a17ae	83	void *info;
e80e7cce	84
d62a17ae	85	/* The table_id from the kernel */
d62a17ae	86	struct vrf_data data;
1da29456	87
b95c1883 PG	88	/* Back pointer to namespace context */
	89	void *ns_ctxt;
	90
d62a17ae	91	QOBJ_FIELDS
216b18ef	92	};
d62a17ae	93	RB_HEAD(vrf_id_head, vrf);
	94	RB_PROTOTYPE(vrf_id_head, vrf, id_entry, vrf_id_compare)
	95	RB_HEAD(vrf_name_head, vrf);
	96	RB_PROTOTYPE(vrf_name_head, vrf, name_entry, vrf_name_compare)
e80e7cce	97	DECLARE_QOBJ_TYPE(vrf)
216b18ef	98
78dd30b2 PG	99	/* Allow VRF with netns as backend */
	100	#define VRF_BACKEND_VRF_LITE 0
	101	#define VRF_BACKEND_NETNS 1
216b18ef	102
1a1a7065	103	extern struct vrf_id_head vrfs_by_id;
806f8760	104	extern struct vrf_name_head vrfs_by_name;
216b18ef	105
d62a17ae	106	extern struct vrf *vrf_lookup_by_id(vrf_id_t);
	107	extern struct vrf vrf_lookup_by_name(const char );
	108	extern struct vrf vrf_get(vrf_id_t, const char );
523cafc4	109	extern const char *vrf_id_to_name(vrf_id_t vrf_id);
d62a17ae	110	extern vrf_id_t vrf_name_to_id(const char *);
d62a17ae	111
ec1db588	112	#define VRF_GET_ID(V, NAME, USE_JSON) \
d62a17ae	113	do { \
7fe96307 A	114	struct vrf *_vrf; \
7fe96307 A	115	if (!(_vrf = vrf_lookup_by_name(NAME))) { \
ec1db588 NVG	116	if (USE_JSON) { \
	117	vty_out(vty, "{}\n"); \
	118	} else { \
	119	vty_out(vty, "%% VRF %s not found\n", NAME); \
	120	} \
d62a17ae	121	return CMD_WARNING; \
d62a17ae	122	} \
7fe96307	123	if (_vrf->vrf_id == VRF_UNKNOWN) { \
ec1db588 NVG	124	if (USE_JSON) { \
	125	vty_out(vty, "{}\n"); \
	126	} else { \
	127	vty_out(vty, "%% VRF %s not active\n", NAME); \
	128	} \
d62a17ae	129	return CMD_WARNING; \
d62a17ae	130	} \
7fe96307	131	(V) = _vrf->vrf_id; \
d62a17ae	132	} while (0)
216b18ef	133
84915b0a	134	/*
	135	* Check whether the VRF is enabled.
	136	*/
	137	static inline int vrf_is_enabled(struct vrf *vrf)
	138	{
	139	return vrf && CHECK_FLAG(vrf->status, VRF_ACTIVE);
	140	}
	141
	142	/* check if the vrf is user configured */
	143	static inline int vrf_is_user_cfged(struct vrf *vrf)
	144	{
	145	return vrf && CHECK_FLAG(vrf->status, VRF_CONFIGURED);
	146	}
	147
22bd3e94	148	/* Mark that VRF has user configuration */
	149	static inline void vrf_set_user_cfged(struct vrf *vrf)
	150	{
	151	SET_FLAG(vrf->status, VRF_CONFIGURED);
	152	}
	153
	154	/* Mark that VRF no longer has any user configuration */
	155	static inline void vrf_reset_user_cfged(struct vrf *vrf)
	156	{
	157	UNSET_FLAG(vrf->status, VRF_CONFIGURED);
	158	}
	159
b72ede27 FL	160	/*
	161	* Utilities to obtain the user data
	162	*/
	163
	164	/* Get the data pointer of the specified VRF. If not found, create one. */
d62a17ae	165	extern void *vrf_info_get(vrf_id_t);
b72ede27	166	/* Look up the data pointer of the specified VRF. */
d62a17ae	167	extern void *vrf_info_lookup(vrf_id_t);
b72ede27	168
7076bb2f FL	169	/*
	170	* VRF bit-map: maintaining flags, one bit per VRF ID
	171	*/
	172
d62a17ae	173	typedef void *vrf_bitmap_t;
7076bb2f FL	174	#define VRF_BITMAP_NULL NULL
7076bb2f FL	175
d62a17ae	176	extern vrf_bitmap_t vrf_bitmap_init(void);
	177	extern void vrf_bitmap_free(vrf_bitmap_t);
	178	extern void vrf_bitmap_set(vrf_bitmap_t, vrf_id_t);
	179	extern void vrf_bitmap_unset(vrf_bitmap_t, vrf_id_t);
	180	extern int vrf_bitmap_check(vrf_bitmap_t, vrf_id_t);
7076bb2f	181
b72ede27 FL	182	/*
b72ede27 FL	183	* VRF initializer/destructor
97b1a80c DS	184	*
	185	* create -> Called back when a new VRF is created. This
	186	* can be either through these 3 options:
	187	* 1) CLI mentions a vrf before OS knows about it
	188	* 2) OS calls zebra and we create the vrf from OS
	189	* callback
	190	* 3) zebra calls individual protocols to notify
	191	* about the new vrf
	192	*
	193	* enable -> Called back when a VRF is actually usable from
	194	* an OS perspective ( 2 and 3 above )
	195	*
	196	* disable -> Called back when a VRF is being deleted from
	197	* the system ( 2 and 3 ) above
	198	*
	199	* delete -> Called back when a vrf is being deleted from
	200	* the system ( 2 and 3 ) above.
b72ede27	201	*/
ecbc5a37 PG	202	extern void vrf_init(int (create)(struct vrf vrf), int (enable)(struct vrf vrf),
ecbc5a37 PG	203	int (disable)(struct vrf vrf), int (delete)(struct vrf vrf),
1768243e	204	int (update)(struct vrf vrf));
ecbc5a37	205
97b1a80c DS	206	/*
97b1a80c DS	207	* Call vrf_terminate when the protocol is being shutdown
b72ede27	208	*/
d62a17ae	209	extern void vrf_terminate(void);
b72ede27	210
e5bf3e1e	211	/*
e26aedbe PG	212	* Utilities to create networks objects,
e26aedbe PG	213	* or call network operations
e5bf3e1e FL	214	*/
	215
	216	/* Create a socket serving for the given VRF */
996c9314	217	extern int vrf_socket(int domain, int type, int protocol, vrf_id_t vrf_id,
0f4977c6 PG	218	char *name);
0f4977c6 PG	219
996c9314 LB	220	extern int vrf_sockunion_socket(const union sockunion *su, vrf_id_t vrf_id,
996c9314 LB	221	char *name);
0f4977c6 PG	222
0f4977c6 PG	223	extern int vrf_bind(vrf_id_t vrf_id, int fd, char *name);
ce1be369	224
2e0d2b3d PG	225	/* VRF ioctl operations */
2e0d2b3d PG	226	extern int vrf_getaddrinfo(const char node, const char service,
996c9314 LB	227	const struct addrinfo hints, struct addrinfo *res,
996c9314 LB	228	vrf_id_t vrf_id);
e26aedbe	229
516d7591 PG	230	extern int vrf_ioctl(vrf_id_t vrf_id, int d, unsigned long request, char *args);
516d7591 PG	231
e26aedbe PG	232	/* function called by macro VRF_DEFAULT
	233	* to get the default VRF_ID
	234	*/
	235	extern vrf_id_t vrf_get_default_id(void);
	236	/* The default VRF ID */
	237	#define VRF_DEFAULT vrf_get_default_id()
	238
4fe52e76	239	extern void vrf_set_default_name(const char *default_name, bool force);
c200f5e1 PG	240	extern const char *vrf_get_default_name(void);
	241	#define VRF_DEFAULT_NAME vrf_get_default_name()
	242
e26aedbe	243	/* VRF is mapped on netns or not ? */
3d4c0b49	244	int vrf_is_mapped_on_netns(struct vrf *vrf);
e26aedbe	245
2e0d2b3d PG	246	/* VRF switch from NETNS */
	247	extern int vrf_switch_to_netns(vrf_id_t vrf_id);
	248	extern int vrf_switchback_to_initial(void);
	249
e26aedbe PG	250	/*
	251	* VRF backend routines
	252	* should be called from zebra only
697d3ec7	253	*/
e5bf3e1e	254
e26aedbe PG	255	/* VRF vty command initialisation
e26aedbe PG	256	*/
3bc34908 PG	257	extern void vrf_cmd_init(int (writefunc)(struct vty vty),
3bc34908 PG	258	struct zebra_privs_t *daemon_priv);
e26aedbe PG	259
e26aedbe PG	260	/* VRF vty debugging
19dc275e	261	*/
d62a17ae	262	extern void vrf_install_commands(void);
ec31f30d	263
e26aedbe PG	264	/*
	265	* VRF utilities
	266	*/
ec31f30d	267
e26aedbe PG	268	/* API for configuring VRF backend
	269	* should be called from zebra only
	270	*/
	271	extern void vrf_configure_backend(int vrf_backend_netns);
	272	extern int vrf_get_backend(void);
	273	extern int vrf_is_backend_netns(void);
	274
	275
	276	/* API to create a VRF. either from vty
	277	* or through discovery
	278	*/
996c9314	279	extern int vrf_handler_create(struct vty vty, const char name,
e26aedbe PG	280	struct vrf **vrf);
	281
	282	/* API to associate a VRF with a NETNS.
	283	* called either from vty or through discovery
	284	* should be called from zebra only
	285	*/
	286	extern int vrf_netns_handler_create(struct vty vty, struct vrf vrf,
03aff2d8 PG	287	char *pathname, ns_id_t ext_ns_id,
03aff2d8 PG	288	ns_id_t ns_id);
e26aedbe PG	289
	290	/* used internally to enable or disable VRF.
	291	* Notify a change in the VRF ID of the VRF
	292	*/
	293	extern void vrf_disable(struct vrf *vrf);
	294	extern int vrf_enable(struct vrf *vrf);
0c902ba5	295	extern void vrf_delete(struct vrf *vrf);
0b014ea6	296	extern vrf_id_t vrf_generate_id(void);
ec31f30d	297
b72ede27	298	#endif /_ZEBRA_VRF_H/