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flow: Move flow_count from context structure to a global

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In general, the passt code is a bit haphazard about what's a true global
variable and what's in the quasi-global 'context structure'.  The
flow_count field is one such example: it's in the context structure,
although it's really part of the same data structure as flowtab[], which
is a genuine global.

Move flow_count to be a regular global to match.  For now it needs to be
public, rather than static, but we expect to be able to change that in
future.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson 2024-01-16 11:50:40 +11:00 • committed by Stefano Brivio
parent 7f37bf4cd5
commit fb7c00169d
7 changed files with 17 additions and 18 deletions

11
flow.c
View file

@ -26,6 +26,7 @@ static_assert(ARRAY_SIZE(flow_type_str) == FLOW_NUM_TYPES,
"flow_type_str[] doesn't match enum flow_type");
/* Global Flow Table */
unsigned flow_count;
union flow flowtab[FLOW_MAX];
/* Last time the flow timers ran */
@ -54,18 +55,18 @@ void flow_log_(const struct flow_common *f, int pri, const char *fmt, ...)
* @c: Execution context
* @hole: Pointer to recently closed flow
*/
void flow_table_compact(struct ctx *c, union flow *hole)
void flow_table_compact(const struct ctx *c, union flow *hole)
{
union flow *from;
if (FLOW_IDX(hole) == --c->flow_count) {
if (FLOW_IDX(hole) == --flow_count) {
debug("flow: table compaction: maximum index was %u (%p)",
FLOW_IDX(hole), (void *)hole);
memset(hole, 0, sizeof(*hole));
return;
}
from = flowtab + c->flow_count;
from = flowtab + flow_count;
memcpy(hole, from, sizeof(*hole));
switch (from->f.type) {
@ -93,7 +94,7 @@ void flow_table_compact(struct ctx *c, union flow *hole)
* @c: Execution context
* @now: Current timestamp
*/
void flow_defer_handler(struct ctx *c, const struct timespec *now)
void flow_defer_handler(const struct ctx *c, const struct timespec *now)
{
bool timer = false;
union flow *flow;
@ -103,7 +104,7 @@ void flow_defer_handler(struct ctx *c, const struct timespec *now)
flow_timer_run = *now;
}
for (flow = flowtab + c->flow_count - 1; flow >= flowtab; flow--) {
for (flow = flowtab + flow_count - 1; flow >= flowtab; flow--) {
switch (flow->f.type) {
case FLOW_TCP:
tcp_flow_defer(c, flow);