Differential D21308 Diff 60969 head/sys/dev/random/random_harvestq.c

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head/sys/dev/random/random_harvestq.c

Show First 20 Lines • Show All 441 Lines • ▼ Show 20 Line(s)	if (data != NULL && size != 0) {
explicit_bzero(data, size);		explicit_bzero(data, size);
if (bootverbose)		if (bootverbose)
printf("random: read %zu bytes from preloaded cache\n", size);		printf("random: read %zu bytes from preloaded cache\n", size);
} else		} else
if (bootverbose)		if (bootverbose)
printf("random: no preloaded entropy cache\n");		printf("random: no preloaded entropy cache\n");
}		}
}		}
SYSINIT(random_device_prime, SI_SUB_RANDOM, SI_ORDER_FOURTH, random_harvestq_prime, NULL);		SYSINIT(random_device_prime, SI_SUB_RANDOM, SI_ORDER_MIDDLE, random_harvestq_prime, NULL);

/* ARGSUSED */		/* ARGSUSED */
static void		static void
random_harvestq_deinit(void *unused __unused)		random_harvestq_deinit(void *unused __unused)
{		{

/* Command the hash/reseed thread to end and wait for it to finish */		/* Command the hash/reseed thread to end and wait for it to finish */
random_kthread_control = 0;		random_kthread_control = 0;
▲ Show 20 Lines • Show All 91 Lines • ▼ Show 20 Line(s)
}		}

void		void
random_harvest_deregister_source(enum random_entropy_source source)		random_harvest_deregister_source(enum random_entropy_source source)
{		{

hc_source_mask &= ~(1 << source);		hc_source_mask &= ~(1 << source);
}		}

		void
		random_source_register(struct random_source *rsource)
		{
		struct random_sources *rrs;

		KASSERT(rsource != NULL, ("invalid input to %s", __func__));

		rrs = malloc(sizeof(*rrs), M_ENTROPY, M_WAITOK);
		rrs->rrs_source = rsource;

		random_harvest_register_source(rsource->rs_source);

		printf("random: registering fast source %s\n", rsource->rs_ident);
		LIST_INSERT_HEAD(&source_list, rrs, rrs_entries);
		}

		void
		random_source_deregister(struct random_source *rsource)
		{
		struct random_sources *rrs = NULL;

		KASSERT(rsource != NULL, ("invalid input to %s", __func__));

		random_harvest_deregister_source(rsource->rs_source);

		LIST_FOREACH(rrs, &source_list, rrs_entries)
		if (rrs->rrs_source == rsource) {
		LIST_REMOVE(rrs, rrs_entries);
		break;
		}
		if (rrs != NULL)
		free(rrs, M_ENTROPY);
		}

		static int
		random_source_handler(SYSCTL_HANDLER_ARGS)
		{
		struct random_sources *rrs;
		struct sbuf sbuf;
		int error, count;

		sbuf_new_for_sysctl(&sbuf, NULL, 64, req);
		count = 0;
		LIST_FOREACH(rrs, &source_list, rrs_entries) {
		sbuf_cat(&sbuf, (count++ ? ",'" : "'"));
		sbuf_cat(&sbuf, rrs->rrs_source->rs_ident);
		sbuf_cat(&sbuf, "'");
		}
		error = sbuf_finish(&sbuf);
		sbuf_delete(&sbuf);
		return (error);
		}
		SYSCTL_PROC(_kern_random, OID_AUTO, random_sources, CTLTYPE_STRING \| CTLFLAG_RD \| CTLFLAG_MPSAFE,
		NULL, 0, random_source_handler, "A",
		"List of active fast entropy sources.");

MODULE_VERSION(random_harvestq, 1);		MODULE_VERSION(random_harvestq, 1);