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authorDave Barach <dave@barachs.net>2020-07-29 18:07:02 -0400
committerDave Barach <dave@barachs.net>2020-07-29 18:08:01 -0400
commitcaebbcf3cd19eff9dd505a89d12e26e331c77922 (patch)
tree11f4598722ec6d957ee6bfccb4b772be430fb931
parent4c5343600d4fa4351816dd44a26c6a9b81e6b47e (diff)
feature: add vnet_feature_is_enabled
A predicate function which says whether a given sw_if_index has a certain feature enabled. int vnet_feature_is_enabled (const char *arc_name, const char *feature_node_name, u32 sw_if_index) returns 1 if the feature is enabled returns 0 if the feature is not enabled returns VNET_API_ERROR_INVALID_VALUE if the arc name is not found returns VNET_API_ERROR_INVALID_VALUE_2 if the feature node name is not found returns VNET_API_ERROR_INVALID_SW_IF_INDEX if the sw_if_index is not found Type: improvement Signed-off-by: Dave Barach <dave@barachs.net> Change-Id: Id9ed53e2ae9252efc750ae80fd610456b95cefa4
-rw-r--r--src/vnet/feature/feature.c57
-rw-r--r--src/vnet/feature/feature.h4
2 files changed, 60 insertions, 1 deletions
diff --git a/src/vnet/feature/feature.c b/src/vnet/feature/feature.c
index 09dd9cc965f..1bdd695e1de 100644
--- a/src/vnet/feature/feature.c
+++ b/src/vnet/feature/feature.c
@@ -15,7 +15,6 @@
#include <vnet/feature/feature.h>
-
vnet_feature_main_t feature_main;
typedef struct vnet_feature_upd_registration_t_
@@ -321,6 +320,62 @@ vnet_feature_enable_disable (const char *arc_name, const char *node_name,
n_feature_config_bytes);
}
+int
+vnet_feature_is_enabled (const char *arc_name, const char *feature_node_name,
+ u32 sw_if_index)
+{
+ vnet_feature_main_t *fm = &feature_main;
+ vnet_feature_config_main_t *cm;
+ vnet_config_main_t *ccm;
+ vnet_config_t *current_config;
+ vnet_config_feature_t *f;
+ u32 feature_index;
+ u32 ci;
+ u8 arc_index;
+ u32 *p;
+
+ arc_index = vnet_get_feature_arc_index (arc_name);
+
+ /* No such arc? */
+ if (arc_index == (u8) ~ 0)
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ feature_index = vnet_get_feature_index (arc_index, feature_node_name);
+
+ /* No such feature? */
+ if (feature_index == (u32) ~ 0)
+ return VNET_API_ERROR_INVALID_VALUE_2;
+
+ cm = &fm->feature_config_mains[arc_index];
+
+ if (sw_if_index < vec_len (cm->config_index_by_sw_if_index))
+ ci = vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
+ else
+ /* sw_if_index out of range, certainly not enabled */
+ return VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ /* No features were ever configured? */
+ if (ci == ~0)
+ return 0;
+
+ ccm = &cm->config_main;
+
+ p = heap_elt_at_index (ccm->config_string_heap, ci);
+
+ current_config = pool_elt_at_index (ccm->config_pool, p[-1]);
+
+ /* Find feature with the required index */
+ vec_foreach (f, current_config->features)
+ {
+ if (f->feature_index == feature_index)
+ /* Feature was enabled */
+ return 1;
+ }
+ /* feature wasn't enabled */
+ return 0;
+}
+
+
u32
vnet_feature_modify_end_node (u8 arc_index,
u32 sw_if_index, u32 end_node_index)
diff --git a/src/vnet/feature/feature.h b/src/vnet/feature/feature.h
index 6eb6de3fba7..9aa32182ef6 100644
--- a/src/vnet/feature/feature.h
+++ b/src/vnet/feature/feature.h
@@ -488,6 +488,10 @@ typedef void (*vnet_feature_update_cb_t) (u32 sw_if_index,
extern void vnet_feature_register (vnet_feature_update_cb_t cb, void *data);
+int
+vnet_feature_is_enabled (const char *arc_name, const char *feature_node_name,
+ u32 sw_if_index);
+
#endif /* included_feature_h */
/*