colin/passt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

flow: Introduce 'sidx' type to represent one side of one flow

Browse Source 
In a number of places, we use indices into the flow table to identify a
specific flow.  We also have cases where we need to identify a particular
side of a particular flow, and we expect those to become more common as
we generalise the flow table to cover more things.

To assist with that, introduces flow_sidx_t, an index type which identifies
a specific side of a specific flow in the table.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[sbrivio: Suppress false cppcheck positive in flow_sidx()]
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson
2023-11-30 13:02:14 +11:00
committed by Stefano Brivio
parent eb8b1a233b
commit df96a4cb5d
2 changed files with 52 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
flow.h
View File

@@ -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);