linux-ext4 - [PATCH 08/12] container quota: let quotactl(2) works for container.

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Date:	Wed, 30 May 2012 22:59:02 +0800
From:	jeff.liu@...cle.com
To:	containers@...ts.linux-foundation.org
Cc:	cgroups@...r.kernel.org, jack@...e.cz, glommer@...allels.com,
	daniel.lezcano@...e.fr, tytso@....edu, bpm@....com,
	chris.mason@...cle.com, hch@...radead.org,
	christopher.jones@...cle.com, david@...morbit.com,
	tinguely@....com, tm@....ma, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, Jie Liu <jeff.liu@...cle.com>
Subject: [PATCH 08/12] container quota: let quotactl(2) works for container.

Modify quotactl(2) to determine for container quota control operations.

Signed-off-by: Jie Liu <jeff.liu@...cle.com>
---
 fs/quota/quota.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index 9a39120..40f381e 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -18,6 +18,12 @@
 #include <linux/types.h>
 #include <linux/writeback.h>
 
+/* Mount namespace disk quota required */
+#include <linux/mount.h>
+#include <linux/mnt_namespace.h>
+#include "../ns_quota.h"
+#include "../ns_quotaops.h"
+
 static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
 				     qid_t id)
 {
@@ -355,6 +361,14 @@ SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special,
 	type = cmd & SUBCMDMASK;
 
 	/*
+	 * Perform mount namespace quotactl when it is invoked from container.
+	 */
+	if (do_quotactl_for_container(special)) {
+		ret = do_container_quotactl(type, cmds, id, addr);
+		goto out;
+	}
+
+	/*
 	 * As a special case Q_SYNC can be called without a specific device.
 	 * It will iterate all superblocks that have quota enabled and call
 	 * the sync action on each of them.
-- 
1.7.9

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