From: NeilBrown <neilb@suse.de>
Date: Thu, 22 Dec 2011 23:17:26 +0000 (+1100)
Subject: md: allow non-privileged uses to GET_*_INFO about raid arrays.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=506c9e44a85f6a79fc0643f2d2498ab6cda3d3f8;p=linux-beck.git

md: allow non-privileged uses to GET_*_INFO about raid arrays.

The info is already available in /proc/mdstat and /sys/block in
an accessible form so there is no point in putting a road-block in
the ioctl for information gathering.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index f47f1f8ac44b..004d8e5b2a57 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -6054,8 +6054,15 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode,
 	struct mddev *mddev = NULL;
 	int ro;
 
-	if (!capable(CAP_SYS_ADMIN))
-		return -EACCES;
+	switch (cmd) {
+	case RAID_VERSION:
+	case GET_ARRAY_INFO:
+	case GET_DISK_INFO:
+		break;
+	default:
+		if (!capable(CAP_SYS_ADMIN))
+			return -EACCES;
+	}
 
 	/*
 	 * Commands dealing with the RAID driver but not any