Interfaces can be grouped and each group has an unique positive integer ID.
It can be set via ip link. Symbolic names can be specified in
/etc/iproute2/rt_ifgroup.
Signed-off-by: Laszlo Attila Toth [EMAIL PROTECTED]
---
include/linux/if_link.h |2 +
include/rt_names.h |2 +
ip/ipaddress.c |4 +++
ip/iplink.c | 11
lib/rt_names.c | 62 +++
man/man8/ip.8 |5
6 files changed, 86 insertions(+), 0 deletions(-)
diff --git a/include/linux/if_link.h b/include/linux/if_link.h
index c948395..5a2d071 100644
--- a/include/linux/if_link.h
+++ b/include/linux/if_link.h
@@ -79,6 +79,8 @@ enum
IFLA_LINKINFO,
#define IFLA_LINKINFO IFLA_LINKINFO
IFLA_NET_NS_PID,
+ IFLA_IFGROUP,
+#defineIFLA_IFGROUP IFLA_IFGROUP
__IFLA_MAX
};
diff --git a/include/rt_names.h b/include/rt_names.h
index 07a10e0..72c5247 100644
--- a/include/rt_names.h
+++ b/include/rt_names.h
@@ -8,11 +8,13 @@ char* rtnl_rtscope_n2a(int id, char *buf, int len);
char* rtnl_rttable_n2a(__u32 id, char *buf, int len);
char* rtnl_rtrealm_n2a(int id, char *buf, int len);
char* rtnl_dsfield_n2a(int id, char *buf, int len);
+char* rtnl_ifgroup_n2a(int id, char *buf, int len);
int rtnl_rtprot_a2n(__u32 *id, char *arg);
int rtnl_rtscope_a2n(__u32 *id, char *arg);
int rtnl_rttable_a2n(__u32 *id, char *arg);
int rtnl_rtrealm_a2n(__u32 *id, char *arg);
int rtnl_dsfield_a2n(__u32 *id, char *arg);
+int rtnl_ifgroup_a2n(__u32 *id, char *arg);
const char *inet_proto_n2a(int proto, char *buf, int len);
int inet_proto_a2n(char *buf);
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index d1c6620..1ecbe03 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -227,6 +227,10 @@ int print_linkinfo(const struct sockaddr_nl *who,
fprintf(fp, mtu %u , *(int*)RTA_DATA(tb[IFLA_MTU]));
if (tb[IFLA_QDISC])
fprintf(fp, qdisc %s , (char*)RTA_DATA(tb[IFLA_QDISC]));
+ if (tb[IFLA_IFGROUP]) {
+ SPRINT_BUF(b1);
+ fprintf(fp, group %s ,
rtnl_ifgroup_n2a(*(int*)RTA_DATA(tb[IFLA_IFGROUP]), b1, sizeof(b1)));
+ }
#ifdef IFLA_MASTER
if (tb[IFLA_MASTER]) {
SPRINT_BUF(b1);
diff --git a/ip/iplink.c b/ip/iplink.c
index 8e0ed2a..71bd240 100644
--- a/ip/iplink.c
+++ b/ip/iplink.c
@@ -27,6 +27,7 @@
#include string.h
#include sys/ioctl.h
#include linux/sockios.h
+#include linux/rtnetlink.h
#include rt_names.h
#include utils.h
@@ -46,6 +47,7 @@ void iplink_usage(void)
fprintf(stderr, promisc { on | off } |\n);
fprintf(stderr, trailers { on | off }
|\n);
fprintf(stderr, txqueuelen PACKETS |\n);
+ fprintf(stderr, group GROUP |\n);
fprintf(stderr, name NEWNAME |\n);
fprintf(stderr, address LLADDR | broadcast
LLADDR |\n);
fprintf(stderr, mtu MTU }\n);
@@ -145,6 +147,7 @@ static int iplink_have_newlink(void)
static int iplink_modify(int cmd, unsigned int flags, int argc, char **argv)
{
int qlen = -1;
+ __u32 group = 0;
int mtu = -1;
int len;
char abuf[32];
@@ -197,6 +200,14 @@ static int iplink_modify(int cmd, unsigned int flags, int
argc, char **argv)
if (get_integer(qlen, *argv, 0))
invarg(Invalid \txqueuelen\ value\n, *argv);
addattr_l(req.n, sizeof(req), IFLA_TXQLEN, qlen, 4);
+ } else if (matches(*argv, group) == 0) {
+ NEXT_ARG();
+ if (group != 0)
+ duparg(group, *argv);
+
+ if (rtnl_ifgroup_a2n(group, *argv))
+ invarg(\group\ value is invalid\n, *argv);
+ addattr_l(req.n, sizeof(req), IFLA_IFGROUP, group,
sizeof(group));
} else if (strcmp(*argv, mtu) == 0) {
NEXT_ARG();
if (mtu != -1)
diff --git a/lib/rt_names.c b/lib/rt_names.c
index 8d019a0..a067e74 100644
--- a/lib/rt_names.c
+++ b/lib/rt_names.c
@@ -446,3 +446,65 @@ int rtnl_dsfield_a2n(__u32 *id, char *arg)
return 0;
}
+static char * rtnl_rtifgroup_tab[256] = {
+ 0,
+};
+
+static int rtnl_rtifgroup_init;
+
+static void rtnl_rtifgroup_initialize(void)
+{
+ rtnl_rtifgroup_init = 1;
+ rtnl_tab_initialize(/etc/iproute2/rt_ifgroup,
+ rtnl_rtifgroup_tab, 256);
+}
+
+char * rtnl_ifgroup_n2a(int id, char *buf, int len)
+{
+ if (id0 || id=256) {
+ snprintf(buf, len, %d, id);
+ return buf;
+ }
+ if (!rtnl_rtifgroup_tab[id]) {
+ if (!rtnl_rtifgroup_init)
+
