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Message-Id: <1591835721-39497-2-git-send-email-roopa@cumulusnetworks.com>
Date: Wed, 10 Jun 2020 17:35:20 -0700
From: Roopa Prabhu <roopa@...ulusnetworks.com>
To: dsahern@...il.com
Cc: netdev@...r.kernel.org, stephen@...workplumber.org,
nikolay@...ulusnetworks.com
Subject: [PATCH iproute2 net-next v2 1/2] ipnexthop: support for fdb nexthops
From: Roopa Prabhu <roopa@...ulusnetworks.com>
This patch adds support to add and delete
ecmp nexthops of type fdb. Such nexthops can
be linked to vxlan fdb entries.
$ip nexthop add id 12 via 172.16.1.2 fdb
$ip nexthop add id 13 via 172.16.1.3 fdb
$ip nexthop add id 102 group 12/13 fdb
$bridge fdb add 02:02:00:00:00:13 dev vx10 nhid 102 self
Signed-off-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
ip/ipnexthop.c | 16 +++++++++++++++-
man/man8/ip-nexthop.8 | 30 +++++++++++++++++++++++++++---
2 files changed, 42 insertions(+), 4 deletions(-)
diff --git a/ip/ipnexthop.c b/ip/ipnexthop.c
index 99f8963..421d4d0 100644
--- a/ip/ipnexthop.c
+++ b/ip/ipnexthop.c
@@ -20,6 +20,7 @@ static struct {
unsigned int ifindex;
unsigned int master;
unsigned int proto;
+ unsigned int fdb;
} filter;
enum {
@@ -39,7 +40,7 @@ static void usage(void)
" ip nexthop { add | replace } id ID NH [ protocol ID ]\n"
" ip nexthop { get| del } id ID\n"
"SELECTOR := [ id ID ] [ dev DEV ] [ vrf NAME ] [ master DEV ]\n"
- " [ groups ]\n"
+ " [ groups ] [ fdb ]\n"
"NH := { blackhole | [ via ADDRESS ] [ dev DEV ] [ onlink ]\n"
" [ encap ENCAPTYPE ENCAPHDR ] | group GROUP ] }\n"
"GROUP := [ id[,weight]>/<id[,weight]>/... ]\n"
@@ -70,6 +71,12 @@ static int nh_dump_filter(struct nlmsghdr *nlh, int reqlen)
return err;
}
+ if (filter.fdb) {
+ err = addattr_l(nlh, reqlen, NHA_FDB, NULL, 0);
+ if (err)
+ return err;
+ }
+
return 0;
}
@@ -259,6 +266,9 @@ int print_nexthop(struct nlmsghdr *n, void *arg)
if (tb[NHA_OIF])
print_rt_flags(fp, nhm->nh_flags);
+ if (tb[NHA_FDB])
+ print_null(PRINT_ANY, "fdb", "fdb", NULL);
+
print_string(PRINT_FP, NULL, "%s", "\n");
close_json_object();
fflush(fp);
@@ -385,6 +395,8 @@ static int ipnh_modify(int cmd, unsigned int flags, int argc, char **argv)
addattr_l(&req.n, sizeof(req), NHA_BLACKHOLE, NULL, 0);
if (req.nhm.nh_family == AF_UNSPEC)
req.nhm.nh_family = AF_INET;
+ } else if (!strcmp(*argv, "fdb")) {
+ addattr_l(&req.n, sizeof(req), NHA_FDB, NULL, 0);
} else if (!strcmp(*argv, "onlink")) {
nh_flags |= RTNH_F_ONLINK;
} else if (!strcmp(*argv, "group")) {
@@ -487,6 +499,8 @@ static int ipnh_list_flush(int argc, char **argv, int action)
if (get_unsigned(&proto, *argv, 0))
invarg("invalid protocol value", *argv);
filter.proto = proto;
+ } else if (!matches(*argv, "fdb")) {
+ filter.fdb = 1;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
diff --git a/man/man8/ip-nexthop.8 b/man/man8/ip-nexthop.8
index 68164f3..4d55f4d 100644
--- a/man/man8/ip-nexthop.8
+++ b/man/man8/ip-nexthop.8
@@ -38,7 +38,8 @@ ip-nexthop \- nexthop object management
.IR NAME " ] [ "
.B master
.IR DEV " ] [ "
-.BR groups " ] "
+.BR groups " ] [ "
+.BR fdb " ]"
.ti -8
.IR NH " := { "
@@ -49,9 +50,11 @@ ip-nexthop \- nexthop object management
.IR DEV " ] [ "
.BR onlink " ] [ "
.B encap
-.IR ENCAP " ] | "
+.IR ENCAP " ] [ "
+.BR fdb " ] | "
.B group
-.IR GROUP " } "
+.IR GROUP " [ "
+.BR fdb " ] } "
.ti -8
.IR ENCAP " := [ "
@@ -125,6 +128,13 @@ weight (id,weight) and a '/' as a separator between entries.
.TP
.B blackhole
create a blackhole nexthop
+.TP
+.B fdb
+nexthop and nexthop groups for use with layer-2 fdb entries.
+A fdb nexthop group can only have fdb nexthops.
+Example: Used to represent a vxlan remote vtep ip. layer-2 vxlan
+fdb entry pointing to an ecmp nexthop group containing multiple
+remote vtep ips.
.RE
.TP
@@ -148,6 +158,9 @@ show the nexthops using devices enslaved to given master device
.TP
.BI groups
show only nexthop groups
+.TP
+.BI fdb
+show only fdb nexthops and nexthop groups
.RE
.TP
ip nexthop flush
@@ -186,6 +199,17 @@ ip nexthop add id 4 group 1,5/2,11
Adds a nexthop with id 4. The nexthop is a group using nexthops with ids
1 and 2 with nexthop 1 at weight 5 and nexthop 2 at weight 11.
.RE
+.PP
+ip nexthop add id 5 via 192.168.1.2 fdb
+.RS 4
+Adds a fdb nexthop with id 5.
+.RE
+.PP
+ip nexthop add id 7 group 5/6 fdb
+.RS 4
+Adds a fdb nexthop group with id 7. A fdb nexthop group can only have
+fdb nexthops.
+.RE
.SH SEE ALSO
.br
.BR ip (8)
--
2.1.4
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