[PATCH 2/2] iproute2: add support for link set

[Ansuel Smith]

Add support for link set useful to set CPU port for dsa drivers.

Signed-off-by: Ansuel Smith <ansuelsmth at gmail.com>
---
 ...-iplink_allow_to_change_iplink_value.patch | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 package/network/utils/iproute2/patches/191-iplink_allow_to_change_iplink_value.patch

diff --git a/package/network/utils/iproute2/patches/191-iplink_allow_to_change_iplink_value.patch b/package/network/utils/iproute2/patches/191-iplink_allow_to_change_iplink_value.patch
new file mode 100644
index 0000000000..1a8bad9119
--- /dev/null
+++ b/package/network/utils/iproute2/patches/191-iplink_allow_to_change_iplink_value.patch
@@ -0,0 +1,94 @@
+From:   Marek Behún <marek.behun at nic.cz>
+Subject: [PATCH RFC iproute2-next] iplink: allow to change iplink value
+Date:   Sat, 24 Aug 2019 04:42:51 +0200
+
+Allow to change the interface to which a given interface is linked to.
+This is useful in the case of multi-CPU port DSA, for changing the CPU
+port of a given user port.
+
+Signed-off-by: Marek Behún <marek.behun at nic.cz>
+Cc: David Ahern <dsahern at gmail.com>
+Cc: Stephen Hemminger <stephen at networkplumber.org>
+Signed-off-by: Ansuel Smith <ansuelsmth at gmail.com>
+---
+ ip/iplink.c           | 16 +++++-----------
+ man/man8/ip-link.8.in |  7 +++++++
+ 2 files changed, 12 insertions(+), 11 deletions(-)
+
+diff --git a/ip/iplink.c b/ip/iplink.c
+index 212a0885..d52c0aaf 100644
+--- a/ip/iplink.c
++++ b/ip/iplink.c
+@@ -579,7 +579,6 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
+ {
+ 	char *name = NULL;
+ 	char *dev = NULL;
+-	char *link = NULL;
+ 	int ret, len;
+ 	char abuf[32];
+ 	int qlen = -1;
+@@ -590,6 +589,7 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
+ 	int numrxqueues = -1;
+ 	int link_netnsid = -1;
+ 	int index = 0;
++	int link = -1;
+ 	int group = -1;
+ 	int addr_len = 0;
+ 
+@@ -620,7 +620,10 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
+ 				invarg("Invalid \"index\" value", *argv);
+ 		} else if (matches(*argv, "link") == 0) {
+ 			NEXT_ARG();
+-			link = *argv;
++			link = ll_name_to_index(*argv);
++			if (!link)
++				return nodev(*argv);
++			addattr32(&req->n, sizeof(*req), IFLA_LINK, link);
+ 		} else if (matches(*argv, "address") == 0) {
+ 			NEXT_ARG();
+ 			addr_len = ll_addr_a2n(abuf, sizeof(abuf), *argv);
+@@ -1004,15 +1007,6 @@ int iplink_parse(int argc, char **argv, struct iplink_req *req, char **type)
+ 			exit(-1);
+ 		}
+ 
+-		if (link) {
+-			int ifindex;
+-
+-			ifindex = ll_name_to_index(link);
+-			if (!ifindex)
+-				return nodev(link);
+-			addattr32(&req->n, sizeof(*req), IFLA_LINK, ifindex);
+-		}
+-
+ 		req->i.ifi_index = index;
+ 	}
+ 
+diff --git a/man/man8/ip-link.8.in b/man/man8/ip-link.8.in
+index a8ae72d2..800aed05 100644
+--- a/man/man8/ip-link.8.in
++++ b/man/man8/ip-link.8.in
+@@ -149,6 +149,9 @@ ip-link \- network device configuration
+ .br
+ .RB "[ " nomaster " ]"
+ .br
++.RB "[ " link
++.IR DEVICE " ]"
++.br
+ .RB "[ " vrf
+ .IR NAME " ]"
+ .br
+@@ -2131,6 +2134,10 @@ set master device of the device (enslave device).
+ .BI nomaster
+ unset master device of the device (release device).
+ 
++.TP
++.BI link " DEVICE"
++set device to which this device is linked to.
++
+ .TP
+ .BI addrgenmode " eui64|none|stable_secret|random"
+ set the IPv6 address generation mode
+-- 
+2.21.0
+
+
-- 
2.30.2.windows.1