/* remove the monitor mkring from the list of monitors of kring.
* If this is the last monitor, restore the original callbacks
*/
static void
netmap_monitor_del(struct netmap_kring *mkring, struct netmap_kring *kring)
{
/* sinchronize with concurrently running nm_sync()s */
nm_kr_stop(kring, NM_KR_LOCKED);
kring->n_monitors--;
if (mkring->mon_pos != kring->n_monitors) {
kring->monitors[mkring->mon_pos] = kring->monitors[kring->n_monitors];
kring->monitors[mkring->mon_pos]->mon_pos = mkring->mon_pos;
}
kring->monitors[kring->n_monitors] = NULL;
if (kring->n_monitors == 0) {
/* this was the last monitor, restore callbacks and delete monitor array */
D("%s: restoring sync on %s: %p", mkring->name, kring->name, kring->mon_sync);
kring->nm_sync = kring->mon_sync;
kring->mon_sync = NULL;
if (kring->tx == NR_RX) {
D("%s: restoring notify on %s: %p",
mkring->name, kring->name, kring->mon_notify);
kring->nm_notify = kring->mon_notify;
kring->mon_notify = NULL;
}
nm_monitor_dealloc(kring);
}
nm_kr_start(kring);
}
/* remove the monitor mkring from the list of monitors of kring.
* If this is the last monitor, restore the original callbacks
*/
static void
netmap_monitor_del(struct netmap_kring *mkring, struct netmap_kring *kring)
{
struct netmap_zmon_list *mz = &mkring->zmon_list[kring->tx];
int zmon = nm_is_zmon(mkring->na);
if (zmon && mz->prev != NULL)
kring = mz->prev;
/* sinchronize with concurrently running nm_sync()s */
nm_kr_stop(kring, NM_KR_LOCKED);
if (zmon) {
/* remove the monitor from the list */
if (mz->prev != NULL)
mz->prev->zmon_list[kring->tx].next = mz->next;
else
kring->zmon_list[kring->tx].next = mz->next;
if (mz->next != NULL) {
mz->next->zmon_list[kring->tx].prev = mz->prev;
} else {
kring->zmon_list[kring->tx].prev = mz->prev;
}
} else {
/* this is a copy monitor */
uint32_t mon_pos = mkring->mon_pos[kring->tx];
kring->n_monitors--;
if (mon_pos != kring->n_monitors) {
kring->monitors[mon_pos] =
kring->monitors[kring->n_monitors];
kring->monitors[mon_pos]->mon_pos[kring->tx] = mon_pos;
}
kring->monitors[kring->n_monitors] = NULL;
if (kring->n_monitors == 0) {
nm_monitor_dealloc(kring);
}
}
if (nm_monitor_none(kring)) {
/* this was the last monitor, restore the callbacks */
ND("%s: restoring sync on %s: %p", mkring->name, kring->name,
kring->mon_sync);
kring->nm_sync = kring->mon_sync;
kring->mon_sync = NULL;
if (kring->tx == NR_RX) {
ND("%s: restoring notify on %s: %p",
mkring->name, kring->name, kring->mon_notify);
kring->nm_notify = kring->mon_notify;
kring->mon_notify = NULL;
}
}
nm_kr_start(kring);
}