linux-kernel - [RFC 15/18] limits: track RLIMIT

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Message-Id: <1465847065-3577-16-git-send-email-toiwoton@gmail.com>
Date:	Mon, 13 Jun 2016 22:44:22 +0300
From:	Topi Miettinen <toiwoton@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Topi Miettinen <toiwoton@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Doug Ledford <dledford@...hat.com>,
	Vladimir Davydov <vdavydov@...tuozzo.com>,
	Marcus Gelderie <redmnic@...il.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [RFC 15/18] limits: track RLIMIT_MSGQUEUE actual max

Track maximum size of message queues, presented in /proc/self/limits.

Signed-off-by: Topi Miettinen <toiwoton@...il.com>
---
 ipc/mqueue.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index ade739f..edccf55 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -287,6 +287,8 @@ static struct inode *mqueue_get_inode(struct super_block *sb,
 
 		/* all is ok */
 		info->user = get_uid(u);
+		/* XXX resource limits apply per task, not per user */
+		bump_rlimit(RLIMIT_MSGQUEUE, u->mq_bytes);
 	} else if (S_ISDIR(mode)) {
 		inc_nlink(inode);
 		/* Some things misbehave if size == 0 on a directory */
-- 
2.8.1