linux-kernel - [PATCH] ioprio: Allow CAP_SYS_NICE to set IOPRIO_CLASS

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Message-Id: <20130131112612.E7F446FC039@msa105.auone-net.jp>
Date:	Thu, 31 Jan 2013 20:26:12 +0900
From:	Kusanagi Kouichi <slash@...auone-net.jp>
To:	linux-kernel@...r.kernel.org
Cc:	Jens Axboe <axboe@...nel.dk>
Subject: [PATCH] ioprio: Allow CAP_SYS_NICE to set IOPRIO_CLASS_RT

sched_setscheduler allows a process with CAP_SYS_NICE to set
real-time policy. Let ioprio_set follow this.

Signed-off-by: Kusanagi Kouichi <slash@...auone-net.jp>
---
 fs/ioprio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ioprio.c b/fs/ioprio.c
index e50170c..155b51e 100644
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -70,7 +70,7 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio)
 
 	switch (class) {
 		case IOPRIO_CLASS_RT:
-			if (!capable(CAP_SYS_ADMIN))
+			if (!capable(CAP_SYS_NICE) && !capable(CAP_SYS_ADMIN))
 				return -EPERM;
 			/* fall through, rt has prio field too */
 		case IOPRIO_CLASS_BE:
-- 
1.7.10.4

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