From ceaa3a5ecffe0c558c990be6c4ba682be5ce85e8 Mon Sep 17 00:00:00 2001
From: Andrea Claudi <aclaudi@redhat.com>
Date: Mon, 25 Mar 2019 11:40:57 +0100
Subject: [PATCH] devlink: Add support for hot reload

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1644731
Upstream Status: iproute2.git commit 06dd94f952e50

commit 06dd94f952e50edeffe5ea8b7b95b5cd562b9365
Author: Arkadi Sharshevsky <arkadis@mellanox.com>
Date:   Wed Feb 14 10:55:19 2018 +0200

    devlink: Add support for hot reload

    Add support for hot reload. It should be used in order for resource
    updates to take place.

    Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
    Acked-by: Jiri Pirko <jiri@mellanox.com>
    Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 devlink/devlink.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 7f47b79450094..fc3939e564bc8 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -1163,6 +1163,7 @@ static void cmd_dev_help(void)
 	pr_err("                               [ inline-mode { none | link | network | transport } ]\n");
 	pr_err("                               [ encap { disable | enable } ]\n");
 	pr_err("       devlink dev eswitch show DEV\n");
+	pr_err("       devlink dev reload DEV\n");
 }
 
 static bool cmp_arr_last_handle(struct dl *dl, const char *bus_name,
@@ -1602,6 +1603,31 @@ static int cmd_dev_show(struct dl *dl)
 	return err;
 }
 
+static void cmd_dev_reload_help(void)
+{
+	pr_err("Usage: devlink dev reload [ DEV ]\n");
+}
+
+static int cmd_dev_reload(struct dl *dl)
+{
+	struct nlmsghdr *nlh;
+	int err;
+
+	if (dl_argv_match(dl, "help") || dl_no_arg(dl)) {
+		cmd_dev_reload_help();
+		return 0;
+	}
+
+	nlh = mnlg_msg_prepare(dl->nlg, DEVLINK_CMD_RELOAD,
+			       NLM_F_REQUEST | NLM_F_ACK);
+
+	err = dl_argv_parse_put(nlh, dl, DL_OPT_HANDLE, 0);
+	if (err)
+		return err;
+
+	return _mnlg_socket_sndrcv(dl->nlg, nlh, NULL, NULL);
+}
+
 static int cmd_dev(struct dl *dl)
 {
 	if (dl_argv_match(dl, "help")) {
@@ -1614,6 +1640,9 @@ static int cmd_dev(struct dl *dl)
 	} else if (dl_argv_match(dl, "eswitch")) {
 		dl_arg_inc(dl);
 		return cmd_dev_eswitch(dl);
+	} else if (dl_argv_match(dl, "reload")) {
+		dl_arg_inc(dl);
+		return cmd_dev_reload(dl);
 	}
 	pr_err("Command \"%s\" not found\n", dl_argv(dl));
 	return -ENOENT;
-- 
2.20.1