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ipvlan: add ipvlan support

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Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>
This commit is contained in:
Cong Wang 2015-06-09 21:53:09 -07:00 • committed by Thomas Haller
parent d754cb4543
commit 7de5be85bf
6 changed files with 343 additions and 1 deletions
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1
include/Makefile.am
View file

@ -60,6 +60,7 @@ nobase_libnlinclude_HEADERS = \
netlink/route/link/ipip.h \
netlink/route/link/ipvti.h \
netlink/route/link/sit.h \
netlink/route/link/ipvlan.h \
netlink/route/qdisc/cbq.h \
netlink/route/qdisc/dsmark.h \
netlink/route/qdisc/fifo.h \

15
include/linux-private/linux/if_link.h
View file

@ -305,6 +305,21 @@ enum macvlan_mode {
#define MACVLAN_FLAG_NOPROMISC 1
/* IPVLAN section */
enum {
IFLA_IPVLAN_UNSPEC,
IFLA_IPVLAN_MODE,
__IFLA_IPVLAN_MAX
};
#define IFLA_IPVLAN_MAX (__IFLA_IPVLAN_MAX - 1)
enum ipvlan_mode {
IPVLAN_MODE_L2 = 0,
IPVLAN_MODE_L3,
IPVLAN_MODE_MAX
};
/* VXLAN section */
enum {
IFLA_VXLAN_UNSPEC,

37
include/netlink/route/link/ipvlan.h Normal file
View file

@ -0,0 +1,37 @@
/*
* netlink/route/link/ipvlan.h IPVLAN interface
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2015 Cong Wang <cwang@twopensource.com>
*/
#ifndef NETLINK_LINK_IPVLAN_H_
#define NETLINK_LINK_IPVLAN_H_
#include <netlink/netlink.h>
#include <netlink/route/link.h>
#ifdef __cplusplus
extern "C" {
#endif
extern struct rtnl_link *rtnl_link_ipvlan_alloc(void);
extern int rtnl_link_is_ipvlan(struct rtnl_link *);
extern char * rtnl_link_ipvlan_mode2str(int, char *, size_t);
extern int rtnl_link_ipvlan_str2mode(const char *);
extern int rtnl_link_ipvlan_set_mode(struct rtnl_link *,
uint16_t);
extern uint16_t rtnl_link_ipvlan_get_mode(struct rtnl_link *);
#ifdef __cplusplus
}
#endif
#endif

2
lib/Makefile.am
View file

@ -110,7 +110,7 @@ libnl_route_3_la_SOURCES = \
route/link/bonding.c route/link/can.c route/link/macvlan.c \
route/link/vxlan.c route/link/veth.c route/link/ipip.c \
route/link/ipgre.c route/link/sit.c route/link/ipvti.c \
route/link/ip6tnl.c route/link/ifb.c \
route/link/ip6tnl.c route/link/ifb.c route/link/ipvlan.c \
\
route/qdisc/blackhole.c route/qdisc/cbq.c route/qdisc/dsmark.c \
route/qdisc/fifo.c route/qdisc/htb.c route/qdisc/netem.c \

279
lib/route/link/ipvlan.c Normal file
View file

@ -0,0 +1,279 @@
/*
* lib/route/link/ipvlan.c IPVLAN Link Info
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2015 Cong Wang <cwang@twopensource.com>
*/
/**
* @ingroup link
* @defgroup ipvlan IPVLAN
* IP-based Virtual LAN link module
*
* @details
* \b Link Type Name: "ipvlan"
*
* @route_doc{link_ipvlan, IPVLAN Documentation}
*
* @{
*/
#include <netlink-private/netlink.h>
#include <netlink/netlink.h>
#include <netlink/attr.h>
#include <netlink/utils.h>
#include <netlink/object.h>
#include <netlink/route/rtnl.h>
#include <netlink-private/route/link/api.h>
#include <netlink/route/link/ipvlan.h>
#include <linux/if_link.h>
/** @cond SKIP */
#define IPVLAN_HAS_MODE (1<<0)
struct ipvlan_info
{
uint16_t ipi_mode;
uint32_t ipi_mask;
};
/** @endcond */
static struct nla_policy ipvlan_policy[IFLA_IPVLAN_MAX+1] = {
[IFLA_IPVLAN_MODE] = { .type = NLA_U16 },
};
static int ipvlan_alloc(struct rtnl_link *link)
{
struct ipvlan_info *ipi;
if (link->l_info)
memset(link->l_info, 0, sizeof(*ipi));
else {
if ((ipi = calloc(1, sizeof(*ipi))) == NULL)
return -NLE_NOMEM;
link->l_info = ipi;
}
return 0;
}
static int ipvlan_parse(struct rtnl_link *link, struct nlattr *data,
struct nlattr *xstats)
{
struct nlattr *tb[IFLA_IPVLAN_MAX+1];
struct ipvlan_info *ipi;
int err;
NL_DBG(3, "Parsing IPVLAN link info");
if ((err = nla_parse_nested(tb, IFLA_IPVLAN_MAX, data, ipvlan_policy)) < 0)
goto errout;
if ((err = ipvlan_alloc(link)) < 0)
goto errout;
ipi = link->l_info;
if (tb[IFLA_IPVLAN_MODE]) {
ipi->ipi_mode = nla_get_u16(tb[IFLA_IPVLAN_MODE]);
ipi->ipi_mask |= IPVLAN_HAS_MODE;
}
err = 0;
errout:
return err;
}
static void ipvlan_free(struct rtnl_link *link)
{
free(link->l_info);
link->l_info = NULL;
}
static void ipvlan_dump(struct rtnl_link *link, struct nl_dump_params *p)
{
char buf[64];
struct ipvlan_info *ipi = link->l_info;
if (ipi->ipi_mask & IPVLAN_HAS_MODE) {
rtnl_link_ipvlan_mode2str(ipi->ipi_mode, buf, sizeof(buf));
nl_dump(p, "ipvlan-mode %s", buf);
}
}
static int ipvlan_clone(struct rtnl_link *dst, struct rtnl_link *src)
{
struct ipvlan_info *vdst, *vsrc = src->l_info;
int err;
dst->l_info = NULL;
if ((err = rtnl_link_set_type(dst, "ipvlan")) < 0)
return err;
vdst = dst->l_info;
if (!vdst || !vsrc)
return -NLE_NOMEM;
memcpy(vdst, vsrc, sizeof(struct ipvlan_info));
return 0;
}
static int ipvlan_put_attrs(struct nl_msg *msg, struct rtnl_link *link)
{
struct ipvlan_info *ipi = link->l_info;
struct nlattr *data;
if (!(data = nla_nest_start(msg, IFLA_INFO_DATA)))
return -NLE_MSGSIZE;
if (ipi->ipi_mask & IPVLAN_HAS_MODE)
NLA_PUT_U16(msg, IFLA_IPVLAN_MODE, ipi->ipi_mode);
nla_nest_end(msg, data);
nla_put_failure:
return 0;
}
static struct rtnl_link_info_ops ipvlan_info_ops = {
.io_name = "ipvlan",
.io_alloc = ipvlan_alloc,
.io_parse = ipvlan_parse,
.io_dump = {
[NL_DUMP_LINE] = ipvlan_dump,
[NL_DUMP_DETAILS] = ipvlan_dump,
},
.io_clone = ipvlan_clone,
.io_put_attrs = ipvlan_put_attrs,
.io_free = ipvlan_free,
};
/** @cond SKIP */
#define IS_IPVLAN_LINK_ASSERT(link) \
if ((link)->l_info_ops != &ipvlan_info_ops) { \
APPBUG("Link is not a ipvlan link. set type \"ipvlan\" first."); \
return -NLE_OPNOTSUPP; \
}
/** @endcond */
/**
* @name IPVLAN Object
* @{
*/
/**
* Allocate link object of type IPVLAN
*
* @return Allocated link object or NULL.
*/
struct rtnl_link *rtnl_link_ipvlan_alloc(void)
{
struct rtnl_link *link;
int err;
if (!(link = rtnl_link_alloc()))
return NULL;
if ((err = rtnl_link_set_type(link, "ipvlan")) < 0) {
rtnl_link_put(link);
return NULL;
}
return link;
}
/**
* Check if link is a IPVLAN link
* @arg link Link object
*
* @return True if link is a IPVLAN link, otherwise false is returned.
*/
int rtnl_link_is_ipvlan(struct rtnl_link *link)
{
return link->l_info_ops && !strcmp(link->l_info_ops->io_name, "ipvlan");
}
/**
* Set IPVLAN MODE
* @arg link Link object
* @arg mode IPVLAN mode
*
* @return 0 on success or a negative error code
*/
int rtnl_link_ipvlan_set_mode(struct rtnl_link *link, uint16_t mode)
{
struct ipvlan_info *ipi = link->l_info;
IS_IPVLAN_LINK_ASSERT(link);
if (mode != IPVLAN_MODE_L2 && mode != IPVLAN_MODE_L3)
return -NLE_INVAL;
ipi->ipi_mode = mode;
ipi->ipi_mask |= IPVLAN_HAS_MODE;
return 0;
}
/**
* Get IPVLAN Mode
* @arg link Link object
*
* @return IPVLAN mode, 0 if not set or a negative error code.
*/
uint16_t rtnl_link_ipvlan_get_mode(struct rtnl_link *link)
{
struct ipvlan_info *ipi = link->l_info;
IS_IPVLAN_LINK_ASSERT(link);
if (ipi->ipi_mask & IPVLAN_HAS_MODE)
return ipi->ipi_mode;
else
return 0;
}
/** @} */
static const struct trans_tbl ipvlan_modes[] = {
__ADD(IPVLAN_MODE_L2, l2),
__ADD(IPVLAN_MODE_L3, l3),
};
/**
* @name Mode Translation
* @{
*/
char *rtnl_link_ipvlan_mode2str(int mode, char *buf, size_t len)
{
return __type2str(mode, buf, len, ipvlan_modes, ARRAY_SIZE(ipvlan_modes));
}
int rtnl_link_ipvlan_str2mode(const char *name)
{
return __str2type(name, ipvlan_modes, ARRAY_SIZE(ipvlan_modes));
}
/** @} */
static void __init ipvlan_init(void)
{
rtnl_link_register_info(&ipvlan_info_ops);
}
static void __exit ipvlan_exit(void)
{
rtnl_link_unregister_info(&ipvlan_info_ops);
}
/** @} */

10
libnl-route-3.sym
View file

@ -872,3 +872,13 @@ global:
rtnl_tc_str2stat;
rtnl_u32_get_classid;
} libnl_3;
libnl_3_2_27 {
global:
rtnl_link_ipvlan_alloc;
rtnl_link_is_ipvlan;
rtnl_link_ipvlan_mode2str;
rtnl_link_ipvlan_str2mode;
rtnl_link_ipvlan_set_mode;
rtnl_link_ipvlan_get_mode;
} libnl_3_2_26;