From: Oleksij Rempel <o.rempel@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Subject: [PATCH v6 5/8] fs: add prng device
Date: Tue, 21 Mar 2017 15:00:22 +0100 [thread overview]
Message-ID: <20170321140025.25784-6-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20170321140025.25784-1-o.rempel@pengutronix.de>
this should provide easy access to get_random_bytes() interfaces.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
commands/stddev.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/commands/stddev.c b/commands/stddev.c
index 318d05741..93da2c739 100644
--- a/commands/stddev.c
+++ b/commands/stddev.c
@@ -17,6 +17,7 @@
#include <common.h>
#include <init.h>
+#include <stdlib.h>
static ssize_t zero_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, ulong flags)
{
@@ -100,3 +101,31 @@ static int null_init(void)
}
device_initcall(null_init);
+
+static ssize_t prng_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, ulong flags)
+{
+ get_random_bytes(buf, count);
+ return count;
+}
+
+static struct file_operations prngops = {
+ .read = prng_read,
+ .lseek = dev_lseek_default,
+};
+
+static int prng_init(void)
+{
+ struct cdev *cdev;
+
+ cdev = xzalloc(sizeof (*cdev));
+
+ cdev->name = "prng";
+ cdev->flags = DEVFS_IS_CHARACTER_DEV;
+ cdev->ops = &prngops;
+
+ devfs_create(cdev);
+
+ return 0;
+}
+
+device_initcall(prng_init);
--
2.11.0
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next prev parent reply other threads:[~2017-03-21 14:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-21 14:00 [PATCH v6 0/8] upstream hwrng framework Oleksij Rempel
2017-03-21 14:00 ` [PATCH v6 1/8] Release v2017.02.0 Oleksij Rempel
2017-03-21 14:08 ` Oleksij Rempel
2017-03-21 14:00 ` [PATCH v6 2/8] drivers: add simple hw_random implementation Oleksij Rempel
2017-03-22 7:34 ` Sascha Hauer
2017-03-21 14:00 ` [PATCH v6 3/8] lib: random: add get_crypto_bytes interface and use HWRNG if posssible Oleksij Rempel
2017-03-22 7:33 ` Sascha Hauer
2017-03-21 14:00 ` [PATCH v6 4/8] caamrng: port to hwrng framework Oleksij Rempel
2017-03-21 14:00 ` Oleksij Rempel [this message]
2017-03-21 14:00 ` [PATCH v6 6/8] crypto: caam - fix RNG buffer cache alignment Oleksij Rempel
2017-03-21 14:00 ` [PATCH v6 7/8] common: password: make use of get_crypto_bytes Oleksij Rempel
2017-03-21 14:00 ` [PATCH v6 8/8] add seed command Oleksij Rempel
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