diff options
Diffstat (limited to 'src/vnet/adj/adj.h')
| -rw-r--r-- | src/vnet/adj/adj.h | 63 |
1 files changed, 58 insertions, 5 deletions
diff --git a/src/vnet/adj/adj.h b/src/vnet/adj/adj.h index 18a2e1ddbbb..fb3dc368db0 100644 --- a/src/vnet/adj/adj.h +++ b/src/vnet/adj/adj.h @@ -157,14 +157,12 @@ typedef void (*adj_midchain_fixup_t) (vlib_main_t * vm, /** * @brief Flags on an IP adjacency */ -typedef enum ip_adjacency_flags_t_ +typedef enum adj_attr_t_ { - ADJ_FLAG_NONE = 0, - /** * Currently a sync walk is active. Used to prevent re-entrant walking */ - ADJ_FLAG_SYNC_WALK_ACTIVE = (1 << 0), + ADJ_ATTR_SYNC_WALK_ACTIVE = 0, /** * Packets TX through the midchain do not increment the interface @@ -173,10 +171,48 @@ typedef enum ip_adjacency_flags_t_ * the packet will have traversed the interface's TX node, and hence have * been counted, before it traverses ths midchain */ - ADJ_FLAG_MIDCHAIN_NO_COUNT = (1 << 1), + ADJ_ATTR_MIDCHAIN_NO_COUNT, + /** + * When stacking midchains on a fib-entry extract the choice from the + * load-balance returned based on an IP hash of the adj's rewrite + */ + ADJ_ATTR_MIDCHAIN_IP_STACK, + /** + * If the midchain were to stack on its FIB entry a loop would form. + */ + ADJ_ATTR_MIDCHAIN_LOOPED, +} adj_attr_t; + +#define ADJ_ATTR_NAMES { \ + [ADJ_ATTR_SYNC_WALK_ACTIVE] = "walk-active", \ + [ADJ_ATTR_MIDCHAIN_NO_COUNT] = "midchain-no-count", \ + [ADJ_ATTR_MIDCHAIN_IP_STACK] = "midchain-ip-stack", \ + [ADJ_ATTR_MIDCHAIN_LOOPED] = "midchain-looped", \ +} + +#define FOR_EACH_ADJ_ATTR(_attr) \ + for (_attr = ADJ_ATTR_SYNC_WALK_ACTIVE; \ + _attr <= ADJ_ATTR_MIDCHAIN_LOOPED; \ + _attr++) + +/** + * @brief Flags on an IP adjacency + */ +typedef enum adj_flags_t_ +{ + ADJ_FLAG_NONE = 0, + ADJ_FLAG_SYNC_WALK_ACTIVE = (1 << ADJ_ATTR_SYNC_WALK_ACTIVE), + ADJ_FLAG_MIDCHAIN_NO_COUNT = (1 << ADJ_ATTR_MIDCHAIN_NO_COUNT), + ADJ_FLAG_MIDCHAIN_IP_STACK = (1 << ADJ_ATTR_MIDCHAIN_IP_STACK), + ADJ_FLAG_MIDCHAIN_LOOPED = (1 << ADJ_ATTR_MIDCHAIN_LOOPED), } __attribute__ ((packed)) adj_flags_t; /** + * @brief Format adjacency flags + */ +extern u8* format_adj_flags(u8 * s, va_list * args); + +/** * @brief IP unicast adjacency. * @note cache aligned. * @@ -257,6 +293,11 @@ typedef struct ip_adjacency_t_ * Fixup data passed back to the client in the fixup function */ const void *fixup_data; + /** + * the FIB entry this midchain resolves through. required for recursive + * loop detection. + */ + fib_node_index_t fei; } midchain; /** * IP_LOOKUP_NEXT_GLEAN @@ -355,6 +396,18 @@ extern const u8* adj_get_rewrite (adj_index_t ai); extern void adj_feature_update (u32 sw_if_index, u8 arc_index, u8 is_enable); /** + * @brief descend the FIB graph looking for loops + * + * @param ai + * The adj index to traverse + * + * @param entry_indicies) + * A pointer to a vector of FIB entries already visited. + */ +extern int adj_recursive_loop_detect (adj_index_t ai, + fib_node_index_t **entry_indicies); + +/** * @brief * The global adjacnecy pool. Exposed for fast/inline data-plane access */ |