Remove NOBLOCKRANDOM as a compile-time option. Instead, provide

exactly the same functionality via a sysctl, making this feature
a run-time option.

The default is 1(ON), which means that /dev/random device will
NOT block at startup.

setting kern.random.sys.seeded to 0(OFF) will cause /dev/random
to block until the next reseed, at which stage the sysctl
will be changed back to 1(ON).

While I'm here, clean up the sysctls, and make them dynamic.
Reviewed by:		des
Tested on Alpha by:	obrien

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/dev/random/yarrow.c b/sys/dev/random/yarrow.c
index d50dcfa..c28fc74 100644
--- a/sys/dev/random/yarrow.c
+++ b/sys/dev/random/yarrow.c
@@ -184,6 +184,11 @@ random_init(void)
 	mtx_exit(&Giant, MTX_DEF);
 #endif
 
+	/* This can be turned off by the very paranoid
+	 * a reseed will turn it back on.
+	 */
+	random_state.seeded = 1;
+
 	random_state.gengateinterval = 10;
 	random_state.bins = 10;
 	random_state.pool[0].thresh = 100;