netdev - [PATCH] iplink_rmnet: Allow passing IFLA_RMNET

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Message-Id: <20210313000241.602790-1-bjorn.andersson@linaro.org>
Date:   Fri, 12 Mar 2021 18:02:41 -0600
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     netdev@...r.kernel.org
Cc:     Daniele Palmas <dnlplm@...il.com>, Alex Elder <elder@...aro.org>
Subject: [PATCH] iplink_rmnet: Allow passing IFLA_RMNET_FLAGS

Parse and pass IFLA_RMNET_FLAGS to the kernel, to allow changing the
flags from the default of ingress-aggregate only.

Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 ip/iplink_rmnet.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/ip/iplink_rmnet.c b/ip/iplink_rmnet.c
index 1d16440c6900..8a488f3d0316 100644
--- a/ip/iplink_rmnet.c
+++ b/ip/iplink_rmnet.c
@@ -16,6 +16,10 @@ static void print_explain(FILE *f)
 {
 	fprintf(f,
 		"Usage: ... rmnet mux_id MUXID\n"
+		"                 [ingress-deaggregation]\n"
+		"                 [ingress-commands]\n"
+		"                 [ingress-chksumv4]\n"
+		"                 [egress-chksumv4]\n"
 		"\n"
 		"MUXID := 1-254\n"
 	);
@@ -29,6 +33,7 @@ static void explain(void)
 static int rmnet_parse_opt(struct link_util *lu, int argc, char **argv,
 			   struct nlmsghdr *n)
 {
+	struct ifla_rmnet_flags flags = { };
 	__u16 mux_id;
 
 	while (argc > 0) {
@@ -37,6 +42,18 @@ static int rmnet_parse_opt(struct link_util *lu, int argc, char **argv,
 			if (get_u16(&mux_id, *argv, 0))
 				invarg("mux_id is invalid", *argv);
 			addattr16(n, 1024, IFLA_RMNET_MUX_ID, mux_id);
+		} else if (matches(*argv, "ingress-deaggregation") == 0) {
+			flags.mask = ~0;
+			flags.flags |= RMNET_FLAGS_INGRESS_DEAGGREGATION;
+		} else if (matches(*argv, "ingress-commands") == 0) {
+			flags.mask = ~0;
+			flags.flags |= RMNET_FLAGS_INGRESS_MAP_COMMANDS;
+		} else if (matches(*argv, "ingress-chksumv4") == 0) {
+			flags.mask = ~0;
+			flags.flags |= RMNET_FLAGS_INGRESS_MAP_CKSUMV4;
+		} else if (matches(*argv, "egress-chksumv4") == 0) {
+			flags.mask = ~0;
+			flags.flags |= RMNET_FLAGS_EGRESS_MAP_CKSUMV4;
 		} else if (matches(*argv, "help") == 0) {
 			explain();
 			return -1;
@@ -48,11 +65,28 @@ static int rmnet_parse_opt(struct link_util *lu, int argc, char **argv,
 		argc--, argv++;
 	}
 
+	if (flags.mask)
+		addattr_l(n, 1024, IFLA_RMNET_FLAGS, &flags, sizeof(flags));
+
 	return 0;
 }
 
+static void rmnet_print_flags(FILE *fp, __u32 flags)
+{
+	if (flags & RMNET_FLAGS_INGRESS_DEAGGREGATION)
+		print_string(PRINT_ANY, NULL, "%s ", "ingress-deaggregation");
+	if (flags & RMNET_FLAGS_INGRESS_MAP_COMMANDS)
+		print_string(PRINT_ANY, NULL, "%s ", "ingress-commands");
+	if (flags & RMNET_FLAGS_INGRESS_MAP_CKSUMV4)
+		print_string(PRINT_ANY, NULL, "%s ", "ingress-chksumv4");
+	if (flags & RMNET_FLAGS_EGRESS_MAP_CKSUMV4)
+		print_string(PRINT_ANY, NULL, "%s ", "egress-cksumv4");
+}
+
 static void rmnet_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 {
+	struct ifla_vlan_flags *flags;
+
 	if (!tb)
 		return;
 
@@ -64,6 +98,14 @@ static void rmnet_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
 		   "mux_id",
 		   "mux_id %u ",
 		   rta_getattr_u16(tb[IFLA_RMNET_MUX_ID]));
+
+	if (tb[IFLA_RMNET_FLAGS]) {
+		if (RTA_PAYLOAD(tb[IFLA_RMNET_FLAGS]) < sizeof(*flags))
+			return;
+		flags = RTA_DATA(tb[IFLA_RMNET_FLAGS]);
+
+		rmnet_print_flags(f, flags->flags);
+	}
 }
 
 static void rmnet_print_help(struct link_util *lu, int argc, char **argv,
-- 
2.28.0