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ipnexthop: support for fdb nexthops

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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@cumulusnetworks.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Roopa Prabhu 2020-06-10 17:35:20 -07:00 committed by David Ahern
parent 5f6f17db3b
commit a56d17463c
2 changed files with 42 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
ip/ipnexthop.c
View File

@ -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 {

30
man/man8/ip-nexthop.8
View File

@ -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)