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pmksa: add driver callbacks and pmksa_cache_free

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In order to support fullmac drivers the PMKSA entries must be added
and removed from the kernel. To accomplish this a set of driver
callbacks will be added to the PMKSA module. In addition a new
pmksa_cache_free API will be added whos only purpose is to handle
the removal from the kernel.
This commit is contained in:
James Prestwood 2025-02-13 12:18:14 -08:00 committed by Denis Kenzior
parent 651b647570
commit c52d913f20
2 changed files with 45 additions and 2 deletions
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38
src/pmksa.c
View File

@ -40,6 +40,9 @@
static uint64_t dot11RSNAConfigPMKLifetime = 43200ULL * L_USEC_PER_SEC;
static uint32_t pmksa_cache_capacity = 255;
static pmksa_cache_add_func_t driver_add;
static pmksa_cache_remove_func_t driver_remove;
static pmksa_cache_flush_func_t driver_flush;
struct min_heap {
struct pmksa **data;
@ -142,7 +145,7 @@ int pmksa_cache_put(struct pmksa *pmksa)
l_debug("Adding entry with PMKID: "PMKID, PMKID_STR(pmksa->pmkid));
if (cache.used == cache.capacity) {
l_free(cache.data[0]);
pmksa_cache_free(cache.data[0]);
cache.data[0] = pmksa;
__minheap_sift_down(cache.data, cache.used, 0, &ops);
return 0;
@ -152,6 +155,9 @@ int pmksa_cache_put(struct pmksa *pmksa)
__minheap_sift_up(cache.data, cache.used, &ops);
cache.used += 1;
if (driver_add)
driver_add(pmksa);
return 0;
}
@ -167,7 +173,7 @@ int pmksa_cache_expire(uint64_t cutoff)
for (i = 0; i < used; i++) {
if (cache.data[i]->expiration <= cutoff) {
l_free(cache.data[i]);
pmksa_cache_free(cache.data[i]);
continue;
}
@ -190,11 +196,30 @@ int pmksa_cache_flush(void)
{
uint32_t i;
/*
* The driver flush operation is done via a single kernel API call which
* is why below we use l_free instead of pmksa_cache_free as to not
* induce a DEL_PMKSA kernel call for each entry.
*/
if (driver_flush)
driver_flush();
for (i = 0; i < cache.used; i++)
l_free(cache.data[i]);
memset(cache.data, 0, cache.capacity * sizeof(struct pmksa *));
cache.used = 0;
return 0;
}
int pmksa_cache_free(struct pmksa *pmksa)
{
if (driver_remove)
driver_remove(pmksa);
l_free(pmksa);
return 0;
}
@ -217,6 +242,15 @@ void __pmksa_set_config(const struct l_settings *config)
&pmksa_cache_capacity);
}
void __pmksa_set_driver_callbacks(pmksa_cache_add_func_t add,
pmksa_cache_remove_func_t remove,
pmksa_cache_flush_func_t flush)
{
driver_add = add;
driver_remove = remove;
driver_flush = flush;
}
static int pmksa_init(void)
{
cache.capacity = pmksa_cache_capacity;

9
src/pmksa.h
View File

@ -32,6 +32,10 @@ struct pmksa {
size_t pmk_len;
};
typedef void (*pmksa_cache_add_func_t)(const struct pmksa *pmksa);
typedef void (*pmksa_cache_remove_func_t)(const struct pmksa *pmksa);
typedef void (*pmksa_cache_flush_func_t)(void);
struct pmksa **__pmksa_cache_get_all(uint32_t *out_n_entries);
struct pmksa *pmksa_cache_get(const uint8_t spa[static 6],
@ -41,6 +45,11 @@ struct pmksa *pmksa_cache_get(const uint8_t spa[static 6],
int pmksa_cache_put(struct pmksa *pmksa);
int pmksa_cache_expire(uint64_t cutoff);
int pmksa_cache_flush(void);
int pmksa_cache_free(struct pmksa *pmksa);
uint64_t pmksa_lifetime(void);
void __pmksa_set_config(const struct l_settings *config);
void __pmksa_set_driver_callbacks(pmksa_cache_add_func_t add,
pmksa_cache_remove_func_t remove,
pmksa_cache_flush_func_t flush);