netifd: Support for configurable default packet steering behavior

The default packet steering behavior can be configured via the parameter
default_ps in the global section; the default value is true to keep
backwards compatibility.
Device packet steering (rps/xps) config can still be used to override the
default behavior.
This allows you to disable packet steering for all devices without the need
to define a device config list which disables receive/transmit packet steering

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

diff --git a/config.c b/config.c
index 48c4fbf..5d3db9f 100644 (file)
--- a/config.c
+++ b/config.c
@@ -306,6 +306,12 @@ config_init_globals(void)
        const char *ula_prefix = uci_lookup_option_string(
                        uci_ctx, globals, "ula_prefix");
        interface_ip_set_ula_prefix(ula_prefix);
+
+       const char *default_ps = uci_lookup_option_string(
+                       uci_ctx, globals, "default_ps");
+
+       if (default_ps)
+               device_set_default_ps(strcmp(default_ps, "1") ? false : true);
 }
 
 static void

diff --git a/device.c b/device.c
index 092c2d9..dd2823d 100644 (file)
--- a/device.c
+++ b/device.c
@@ -29,6 +29,7 @@
 #include "config.h"
 
 static struct avl_tree devices;
+static bool default_ps = true;
 
 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
        [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
@@ -244,15 +245,19 @@ device_init_settings(struct device *dev, struct blob_attr **tb)
                s->flags |= DEV_OPT_NEIGHREACHABLETIME;
        }
 
-       if ((cur = tb[DEV_ATTR_RPS]))
+       if ((cur = tb[DEV_ATTR_RPS])) {
                s->rps = blobmsg_get_bool(cur);
+               s->flags |= DEV_OPT_RPS;
+       }
        else
-               s->rps = true;
+               s->rps = default_ps;
 
-       if ((cur = tb[DEV_ATTR_XPS]))
+       if ((cur = tb[DEV_ATTR_XPS])) {
                s->xps = blobmsg_get_bool(cur);
+               s->flags |= DEV_OPT_XPS;
+       }
        else
-               s->xps = true;
+               s->xps = default_ps;
 
        device_set_disabled(dev, disabled);
 }
@@ -370,8 +375,8 @@ int device_init(struct device *dev, const struct device_type *type, const char *
 
        system_if_clear_state(dev);
        device_check_state(dev);
-       dev->settings.rps = true;
-       dev->settings.xps = true;
+       dev->settings.rps = default_ps;
+       dev->settings.xps = default_ps;
 
        return 0;
 }
@@ -723,6 +728,41 @@ device_reset_old(void)
        }
 }
 
+void
+device_set_default_ps(bool state)
+{
+       struct device *dev;
+
+       if (state == default_ps)
+               return;
+
+       default_ps = state;
+
+       avl_for_each_element(&devices, dev, avl) {
+               struct device_settings *s = &dev->settings;
+               unsigned int apply_mask = 0;
+
+               if (!(s->flags & DEV_OPT_RPS)) {
+                       s->rps = default_ps;
+                       apply_mask |= DEV_OPT_RPS;
+               }
+
+               if (!(s->flags & DEV_OPT_XPS)) {
+                       s->xps = default_ps;
+                       apply_mask |= DEV_OPT_XPS;
+               }
+
+               if (!apply_mask)
+                       continue;
+
+               if (!(dev->external || (dev->present && dev->active)) ||
+                               dev->config_pending)
+                       continue;
+
+               system_if_apply_settings(dev, s, apply_mask);
+       }
+}
+
 struct device *
 device_create(const char *name, const struct device_type *type,
              struct blob_attr *config)
@@ -758,8 +798,10 @@ device_create(const char *name, const struct device_type *type,
        if (odev)
                device_replace(dev, odev);
 
-       if (!config_init && dev->config_pending)
+       if (!config_init && dev->config_pending) {
                type->config_init(dev);
+               dev->config_pending = false;
+       }
 
        return dev;
 }

diff --git a/device.h b/device.h
index 753e1fa..3001f10 100644 (file)
--- a/device.h
+++ b/device.h
@@ -78,6 +78,8 @@ enum {
        DEV_OPT_IGMPVERSION             = (1 << 7),
        DEV_OPT_MLDVERSION              = (1 << 8),
        DEV_OPT_NEIGHREACHABLETIME      = (1 << 9),
+       DEV_OPT_RPS                     = (1 << 10),
+       DEV_OPT_XPS                     = (1 << 11),
 };
 
 /* events broadcasted to all users of a device */
@@ -206,6 +208,7 @@ device_apply_config(struct device *dev, const struct device_type *type,
 
 void device_reset_config(void);
 void device_reset_old(void);
+void device_set_default_ps(bool state);
 
 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name);
 int device_init(struct device *iface, const struct device_type *type, const char *ifname);