vlandev: support setting ingress/egress QoS mappings

It allows setting mappings for instance this way:
"""
config device
  option name 'vlan41'
  option type '8021q'
  option vid '41'
  option ifname 'eth1'
  list   ingress_qos_mapping '1:2'
  list   ingress_qos_mapping '2:5'
  list   egress_qos_mapping '0:3'
"""

Signed-off-by: Pau Espin Pedrol <pespin.shar@gmail.com>
Tested-by: Pedro <pedrowrt@cas.cat>

3 files changed, 105 insertions, 1 deletions

diff --git a/system-linux.c b/system-linux.c
index 62636c4..c225175 100644
--- a/system-linux.c
+++ b/system-linux.c
@@ -74,6 +74,7 @@
 #include "netifd.h"
 #include "device.h"
 #include "system.h"
+#include "utils.h"
 
 struct event_socket {
 	struct uloop_fd uloop;
@@ -1401,8 +1402,10 @@ int system_vlan_del(struct device *dev)
 int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlandev_config *cfg)
 {
 	struct nl_msg *msg;
-	struct nlattr *linkinfo, *data;
+	struct nlattr *linkinfo, *data, *qos;
 	struct ifinfomsg iim = { .ifi_family = AF_UNSPEC };
+	struct vlan_qos_mapping *elem;
+	struct ifla_vlan_qos_mapping nl_qos_map;
 	int rv;
 
 	msg = nlmsg_alloc_simple(RTM_NEWLINK, NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL);
@@ -1431,6 +1434,26 @@ int system_vlandev_add(struct device *vlandev, struct device *dev, struct vlande
 		netifd_log_message(L_WARNING, "%s Your kernel is older than linux 3.10.0, 802.1ad is not supported defaulting to 802.1q", vlandev->type->name);
 #endif
 
+	if (!(qos = nla_nest_start(msg, IFLA_VLAN_INGRESS_QOS)))
+		goto nla_put_failure;
+
+	vlist_simple_for_each_element(&cfg->ingress_qos_mapping_list, elem, node) {
+		nl_qos_map.from = elem->from;
+		nl_qos_map.to = elem->to;
+		nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
+	}
+	nla_nest_end(msg, qos);
+
+	if (!(qos = nla_nest_start(msg, IFLA_VLAN_EGRESS_QOS)))
+		goto nla_put_failure;
+
+	vlist_simple_for_each_element(&cfg->egress_qos_mapping_list, elem, node) {
+		nl_qos_map.from = elem->from;
+		nl_qos_map.to = elem->to;
+		nla_put(msg, IFLA_VLAN_QOS_MAPPING, sizeof(nl_qos_map), &nl_qos_map);
+	}
+	nla_nest_end(msg, qos);
+
 	nla_nest_end(msg, data);
 	nla_nest_end(msg, linkinfo);
 
diff --git a/system.h b/system.h
index b377416..252fd92 100644
--- a/system.h
+++ b/system.h
@@ -21,6 +21,7 @@
 #include "device.h"
 #include "interface-ip.h"
 #include "iprule.h"
+#include "utils.h"
 
 enum tunnel_param {
 	TUNNEL_ATTR_TYPE,
@@ -158,9 +159,17 @@ enum vlan_proto {
 	VLAN_PROTO_8021AD = 0x88A8
 };
 
+struct vlan_qos_mapping {
+	struct vlist_simple_node node; /* entry in vlandev_config->{e,in}gress_qos_mapping_list */
+	uint32_t from;
+	uint32_t to;
+};
+
 struct vlandev_config {
 	enum vlan_proto proto;
 	uint16_t vid;
+	struct vlist_simple_tree ingress_qos_mapping_list; /* list of struct vlan_qos_mapping */
+	struct vlist_simple_tree egress_qos_mapping_list;  /* list of struct vlan_qos_mapping */
 };
 
 static inline int system_get_addr_family(unsigned int flags)
diff --git a/vlandev.c b/vlandev.c
index ceaeb3e..10b78e2 100644
--- a/vlandev.c
+++ b/vlandev.c
@@ -13,21 +13,27 @@
  */
 
 #include <string.h>
+#include <inttypes.h>
 
 #include "netifd.h"
 #include "device.h"
 #include "interface.h"
 #include "system.h"
+#include "utils.h"
 
 enum {
 	VLANDEV_ATTR_IFNAME,
 	VLANDEV_ATTR_VID,
+	VLANDEV_ATTR_INGRESS_QOS_MAPPING,
+	VLANDEV_ATTR_EGRESS_QOS_MAPPING,
 	__VLANDEV_ATTR_MAX
 };
 
 static const struct blobmsg_policy vlandev_attrs[__VLANDEV_ATTR_MAX] = {
 	[VLANDEV_ATTR_IFNAME] = { "ifname", BLOBMSG_TYPE_STRING },
 	[VLANDEV_ATTR_VID] = { "vid", BLOBMSG_TYPE_INT32 },
+	[VLANDEV_ATTR_INGRESS_QOS_MAPPING] = { "ingress_qos_mapping", BLOBMSG_TYPE_ARRAY },
+	[VLANDEV_ATTR_EGRESS_QOS_MAPPING] = { "egress_qos_mapping", BLOBMSG_TYPE_ARRAY },
 };
 
 static const struct uci_blob_param_list vlandev_attr_list = {
@@ -126,9 +132,30 @@ vlandev_free(struct device *dev)
 	mvdev = container_of(dev, struct vlandev_device, dev);
 	device_remove_user(&mvdev->parent);
 	free(mvdev->config_data);
+	vlist_simple_flush_all(&mvdev->config.ingress_qos_mapping_list);
+	vlist_simple_flush_all(&mvdev->config.egress_qos_mapping_list);
 	free(mvdev);
 }
 
+static void vlandev_qos_mapping_dump(struct blob_buf *b, const char *name, const struct vlist_simple_tree *qos_mapping_li)
+{
+	const struct vlan_qos_mapping *elem;
+	void *a, *t;
+
+	a = blobmsg_open_array(b, name);
+
+	vlist_simple_for_each_element(qos_mapping_li, elem, node) {
+		t = blobmsg_open_table(b, NULL);
+
+		blobmsg_add_u32(b, "from", elem->from);
+		blobmsg_add_u32(b, "to", elem->to);
+
+		blobmsg_close_table(b, t);
+	}
+
+	blobmsg_close_array(b, a);
+}
+
 static void
 vlandev_dump_info(struct device *dev, struct blob_buf *b)
 {
@@ -137,6 +164,8 @@ vlandev_dump_info(struct device *dev, struct blob_buf *b)
 	mvdev = container_of(dev, struct vlandev_device, dev);
 	blobmsg_add_string(b, "parent", mvdev->parent.dev->ifname);
 	system_if_dump_info(dev, b);
+	vlandev_qos_mapping_dump(b, "ingress_qos_mapping", &mvdev->config.ingress_qos_mapping_list);
+	vlandev_qos_mapping_dump(b, "egress_qos_mapping", &mvdev->config.egress_qos_mapping_list);
 }
 
 static void
@@ -152,6 +181,32 @@ vlandev_config_init(struct device *dev)
 	device_add_user(&mvdev->parent, basedev);
 }
 
+static void vlandev_qos_mapping_list_apply(struct vlist_simple_tree *qos_mapping_li, struct blob_attr *list)
+{
+	struct blob_attr *cur;
+	struct vlan_qos_mapping *qos_mapping;
+	int rem, rc;
+
+	blobmsg_for_each_attr(cur, list, rem) {
+		if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
+			continue;
+
+		if (!blobmsg_check_attr(cur, false))
+			continue;
+
+		qos_mapping = calloc(1, sizeof(*qos_mapping));
+		if (!qos_mapping)
+			continue;
+
+		rc = sscanf(blobmsg_data(cur), "%" PRIu32 ":%" PRIu32, &qos_mapping->from, &qos_mapping->to);
+		if (rc != 2) {
+			free(qos_mapping);
+			continue;
+		}
+		vlist_simple_add(qos_mapping_li, &qos_mapping->node);
+	}
+}
+
 static void
 vlandev_apply_settings(struct vlandev_device *mvdev, struct blob_attr **tb)
 {
@@ -162,8 +217,20 @@ vlandev_apply_settings(struct vlandev_device *mvdev, struct blob_attr **tb)
 		VLAN_PROTO_8021Q : VLAN_PROTO_8021AD;
 	cfg->vid = 1;
 
+	vlist_simple_update(&cfg->ingress_qos_mapping_list);
+	vlist_simple_update(&cfg->egress_qos_mapping_list);
+
 	if ((cur = tb[VLANDEV_ATTR_VID]))
 		cfg->vid = (uint16_t) blobmsg_get_u32(cur);
+
+	if ((cur = tb[VLANDEV_ATTR_INGRESS_QOS_MAPPING]))
+		vlandev_qos_mapping_list_apply(&cfg->ingress_qos_mapping_list, cur);
+
+	if ((cur = tb[VLANDEV_ATTR_EGRESS_QOS_MAPPING]))
+		vlandev_qos_mapping_list_apply(&cfg->egress_qos_mapping_list, cur);
+
+	vlist_simple_flush(&cfg->ingress_qos_mapping_list);
+	vlist_simple_flush(&cfg->egress_qos_mapping_list);
 }
 
 static enum dev_change_type
@@ -221,6 +288,11 @@ vlandev_create(const char *name, struct device_type *devtype,
 	if (!mvdev)
 		return NULL;
 
+	vlist_simple_init(&mvdev->config.ingress_qos_mapping_list,
+			  struct vlan_qos_mapping, node);
+	vlist_simple_init(&mvdev->config.egress_qos_mapping_list,
+			  struct vlan_qos_mapping, node);
+
 	dev = &mvdev->dev;
 
 	if (device_init(dev, devtype, name) < 0) {