Before this change, you had to check kernel log messages to see if the non-blocking pool had been properly initialized. With this change, you can consult the file /proc/sys/kernel/random/intialized instead.
Signed-off-by: Florian Weimer <[email protected]> --- drivers/char/random.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/char/random.c b/drivers/char/random.c index 6b75713..81d83e2 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -1592,6 +1592,19 @@ static int proc_do_entropy(ctl_table *table, int write, return proc_dointvec(&fake_table, write, buffer, lenp, ppos); } +/* + * Return whether the urandom pool has been initialized. + */ +static int proc_do_initialized(ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + ctl_table fake_table; + char ch = '0' + nonblocking_pool.initialized; + fake_table.data = &ch; + fake_table.maxlen = 1; + return proc_dostring(&fake_table, write, buffer, lenp, ppos); +} + static int sysctl_poolsize = INPUT_POOL_WORDS * 32; extern struct ctl_table random_table[]; struct ctl_table random_table[] = { @@ -1610,6 +1623,12 @@ struct ctl_table random_table[] = { .data = &input_pool.entropy_count, }, { + .procname = "initialized", + .maxlen = 1, + .mode = 0444, + .proc_handler = proc_do_initialized, + }, + { .procname = "read_wakeup_threshold", .data = &random_read_wakeup_bits, .maxlen = sizeof(int), -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
