diff options
| -rw-r--r-- | flow.h | 14 | ||||
| -rw-r--r-- | flow_table.h | 38 |
2 files changed, 52 insertions, 0 deletions
@@ -39,6 +39,20 @@ struct flow_common { #define FLOW_TABLE_PRESSURE 30 /* % of FLOW_MAX */ #define FLOW_FILE_PRESSURE 30 /* % of c->nofile */ +/** + * struct flow_sidx - ID for one side of a specific flow + * @side: Side referenced (0 or 1) + * @flow: Index of flow referenced + */ +typedef struct flow_sidx { + int side :1; + unsigned flow :FLOW_INDEX_BITS; +} flow_sidx_t; +static_assert(sizeof(flow_sidx_t) <= sizeof(uint32_t), + "flow_sidx_t must fit within 32 bits"); + +#define FLOW_SIDX_NONE ((flow_sidx_t){ .flow = FLOW_MAX }) + union flow; void flow_table_compact(struct ctx *c, union flow *hole); diff --git a/flow_table.h b/flow_table.h index 5e897bd..0dee66f 100644 --- a/flow_table.h +++ b/flow_table.h @@ -47,4 +47,42 @@ static inline unsigned flow_idx(const struct flow_common *f) */ #define FLOW(idx) (&flowtab[(idx)]) +/** flow_at_sidx - Flow entry for a given sidx + * @sidx: Flow & side index + * + * Return: pointer to the corresponding flow entry, or NULL + */ +static inline union flow *flow_at_sidx(flow_sidx_t sidx) +{ + if (sidx.flow >= FLOW_MAX) + return NULL; + return FLOW(sidx.flow); +} + +/** flow_sidx_t - Index of one side of a flow from common structure + * @f: Common flow fields pointer + * @side: Which side to refer to (0 or 1) + * + * Return: index of @f and @side in the flow table + */ +static inline flow_sidx_t flow_sidx(const struct flow_common *f, + int side) +{ + /* cppcheck-suppress [knownConditionTrueFalse, unmatchedSuppression] */ + ASSERT(side == !!side); + + return (flow_sidx_t){ + .side = side, + .flow = flow_idx(f), + }; +} + +/** FLOW_SIDX - Find the index of one side of a flow + * @f_: Flow pointer, either union flow * or protocol specific + * @side: Which side to index (0 or 1) + * + * Return: index of @f and @side in the flow table + */ +#define FLOW_SIDX(f_, side) (flow_sidx(&(f_)->f, (side))) + #endif /* FLOW_TABLE_H */ |