netdev - [PATCH iproute2-next 3/3] iplink: bond: print 3ad actor/partner oper states as strings

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Date:   Sat, 26 Oct 2019 16:29:54 -0700
From:   Andy Roulin <aroulin@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     dsahern@...il.com, nikolay@...ulusnetworks.com,
        roopa@...ulusnetworks.com, j.vosburgh@...il.com, vfalico@...il.com,
        andy@...yhouse.net
Subject: [PATCH iproute2-next 3/3] iplink: bond: print 3ad actor/partner oper states as strings

The 802.3ad actor/partner operating states are only printed as
numbers, e.g,

ad_actor_oper_port_state 15

Add an additional output in ip link show that prints a string describing
the individual 3ad bit meanings in the following way:

ad_actor_oper_port_state_str <active,short_timeout,aggregating,in_sync>

JSON output is also supported, the field becomes a json array:

"ad_actor_oper_port_state_str":
	["active","short_timeout","aggregating","in_sync"]

Signed-off-by: Andy Roulin <aroulin@...ulusnetworks.com>
Acked-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Acked-by: Roopa Prabhu <roopa@...ulusnetworks.com>
---
 ip/iplink_bond_slave.c | 38 ++++++++++++++++++++++++++++++++++----
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/ip/iplink_bond_slave.c b/ip/iplink_bond_slave.c
index 4eaf72b8..99beeca1 100644
--- a/ip/iplink_bond_slave.c
+++ b/ip/iplink_bond_slave.c
@@ -68,6 +68,28 @@ static void print_slave_mii_status(FILE *f, struct rtattr *tb)
 			     slave_mii_status[status]);
 }
 
+static void print_slave_oper_state(FILE *fp, const char *name, __u16 state)
+{
+
+	open_json_array(PRINT_ANY, name);
+	if (!is_json_context())
+		fprintf(fp, " <");
+#define _PF(s, str) if (state&AD_STATE_##s) {				\
+			state &= ~AD_STATE_##s;				\
+			print_string(PRINT_ANY, NULL,   		\
+				     state ? "%s," : "%s", str); }
+	_PF(LACP_ACTIVITY, "active");
+	_PF(LACP_TIMEOUT, "short_timeout");
+	_PF(AGGREGATION, "aggregating");
+	_PF(SYNCHRONIZATION, "in_sync");
+	_PF(COLLECTING, "collecting");
+	_PF(DISTRIBUTING, "distributing");
+	_PF(DEFAULTED, "defaulted");
+	_PF(EXPIRED, "expired");
+#undef _PF
+	close_json_array(PRINT_ANY, "> ");
+}
+
 static void bond_slave_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 {
 	SPRINT_BUF(b1);
@@ -106,17 +128,25 @@ static void bond_slave_print_opt(struct link_util *lu, FILE *f, struct rtattr *t
 			  "ad_aggregator_id %d ",
 			  rta_getattr_u16(tb[IFLA_BOND_SLAVE_AD_AGGREGATOR_ID]));
 
-	if (tb[IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE])
+	if (tb[IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE]) {
+		__u8 state = rta_getattr_u8(tb[IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE]);
+
 		print_int(PRINT_ANY,
 			  "ad_actor_oper_port_state",
 			  "ad_actor_oper_port_state %d ",
-			  rta_getattr_u8(tb[IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE]));
+			  state);
+		print_slave_oper_state(f, "ad_actor_oper_port_state_str", state);
+	}
+
+	if (tb[IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE]) {
+		__u16 state = rta_getattr_u8(tb[IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE]);
 
-	if (tb[IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE])
 		print_int(PRINT_ANY,
 			  "ad_partner_oper_port_state",
 			  "ad_partner_oper_port_state %d ",
-			  rta_getattr_u16(tb[IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE]));
+			  state);
+		print_slave_oper_state(f, "ad_partner_oper_port_state_str", state);
+	}
 }
 
 static int bond_slave_parse_opt(struct link_util *lu, int argc, char **argv,
-- 
2.20.1