haproxy/src/counters.c
Aurelien DARRAGON 4fcc9b5572 MINOR: counters: rename last_change counter to last_state_change
Since proxy and server struct already have an internal last_change
variable and we cannot merge it with the shared counter one, let's
rename the last_change counter to be more specific and prevent the
mixup between the two.

last_change counter is renamed to last_state_change, and unlike the
internal last_change, this one is a shared counter so it is expected
to be updated by other processes in our back.

However, when updating last_state_change counter, we use the value
of the server/proxy last_change as reference value.
2025-06-30 16:26:38 +02:00

101 lines
2.9 KiB
C

/*
* objects counters management
*
* Copyright 2025 HAProxy Technologies
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <haproxy/atomic.h>
#include <haproxy/clock.h>
#include <haproxy/counters.h>
#include <haproxy/global.h>
#include <haproxy/time.h>
static void _counters_shared_drop(void *counters)
{
struct counters_shared *shared = counters;
int it = 0;
if (!shared)
return;
/* memory was allocated using calloc(), simply free it */
while (it < global.nbtgroups) {
free(shared->tg[it]);
it += 1;
}
free(counters);
}
/* release a shared fe counters struct */
void counters_fe_shared_drop(struct fe_counters_shared *counters)
{
_counters_shared_drop(counters);
}
/* release a shared be counters struct */
void counters_be_shared_drop(struct be_counters_shared *counters)
{
_counters_shared_drop(counters);
}
/* retrieved shared counters pointer for a given <guid> object
* <size> hint is expected to reflect the actual tg member size (fe/be)
* if <guid> is not set, then sharing is disabled
* Returns the pointer on success or NULL on failure
*/
static void*_counters_shared_get(const struct guid_node *guid, size_t size)
{
struct counters_shared *shared;
int it = 0;
/* no shared memory for now, simply allocate a memory block
* for the counters (zero-initialized), ignore guid
*/
shared = calloc(1, sizeof(*shared));
if (!shared)
return NULL;
if (!guid->node.key)
shared->flags |= COUNTERS_SHARED_F_LOCAL;
while (it < global.nbtgroups) {
shared->tg[it] = calloc(1, size);
if (!shared->tg[it]) {
_counters_shared_drop(shared);
return NULL;
}
it += 1;
}
/* initial values:
* only set one group, only latest value is considered
*/
HA_ATOMIC_STORE(&shared->tg[0]->last_state_change, ns_to_sec(now_ns));
return shared;
}
/* retrieve shared fe counters pointer for a given <guid> object */
struct fe_counters_shared *counters_fe_shared_get(const struct guid_node *guid)
{
return _counters_shared_get(guid, sizeof(struct fe_counters_shared_tg));
}
/* retrieve shared be counters pointer for a given <guid> object */
struct be_counters_shared *counters_be_shared_get(const struct guid_node *guid)
{
return _counters_shared_get(guid, sizeof(struct be_counters_shared_tg));
}