linux-kernel - [RFC][patch 3/12][CFQ-cgroup] Introduce cgroup subsystem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <006001c8955a$23267fa0$69737ee0$@jp.nec.com>
Date:	Thu, 3 Apr 2008 16:12:54 +0900
From:	"Satoshi UCHIDA" <s-uchida@...jp.nec.com>
To:	"'Satoshi UCHIDA'" <s-uchida@...jp.nec.com>,
	"'Paul Menage'" <menage@...gle.com>,
	<linux-kernel@...r.kernel.org>,
	<containers@...ts.linux-foundation.org>
Cc:	<axboe@...nel.dk>, <tom-sugawara@...jp.nec.com>
Subject: [RFC][patch 3/12][CFQ-cgroup] Introduce cgroup subsystem

This patch introduces a simple cgroup subsystem.
New cgroup subsystem is called cfq_cgroup.

   Signed-off-by: Satoshi UCHIDA <uchida@...jp.nec.com>

---
 block/Makefile                |    1 +
 block/cfq-cgroup.c            |   57 +++++++++++++++++++++++++++++++++++++++++
 include/linux/cgroup_subsys.h |    6 ++++
 3 files changed, 64 insertions(+), 0 deletions(-)
 create mode 100644 block/cfq-cgroup.c

diff --git a/block/Makefile b/block/Makefile
index 5a43c7d..ea07b46 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_IOSCHED_NOOP)	+= noop-iosched.o
 obj-$(CONFIG_IOSCHED_AS)	+= as-iosched.o
 obj-$(CONFIG_IOSCHED_DEADLINE)	+= deadline-iosched.o
 obj-$(CONFIG_IOSCHED_CFQ)	+= cfq-iosched.o
+obj-$(CONFIG_CGROUP_CFQ)	+= cfq-cgroup.o
 
 obj-$(CONFIG_BLK_DEV_IO_TRACE)	+= blktrace.o
 obj-$(CONFIG_BLOCK_COMPAT)	+= compat_ioctl.o
diff --git a/block/cfq-cgroup.c b/block/cfq-cgroup.c
new file mode 100644
index 0000000..de00a0d
--- /dev/null
+++ b/block/cfq-cgroup.c
@@ -0,0 +1,57 @@
+/*
+ *  CFQ CGROUP disk scheduler.
+ *
+ *     This program is a wrapper program that is
+ *     extend CFQ disk scheduler for handling
+ *     cgroup subsystem. 
+ *
+ *     This program is based on original CFQ code.
+ * 
+ *  Copyright (C) 2008 Satoshi UCHIDA <s-uchida@...jp.nec.com>
+ *   and NEC Corp.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/cgroup.h>
+#include <linux/cfq-iosched.h>
+
+struct cfq_cgroup {
+	struct cgroup_subsys_state css;
+};
+
+
+static inline struct cfq_cgroup *cgroup_to_cfq_cgroup(struct cgroup *cont)
+{
+	return container_of(cgroup_subsys_state(cont, cfq_subsys_id),
+			    struct cfq_cgroup, css);
+}
+
+static struct cgroup_subsys_state *
+cfq_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
+{
+	struct cfq_cgroup *cfqc;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return ERR_PTR(-EPERM);
+
+	if (!cgroup_is_descendant(cont))
+		return ERR_PTR(-EPERM);
+
+	cfqc = kzalloc(sizeof(struct cfq_cgroup), GFP_KERNEL);
+	if (unlikely(!cfqc))
+		return ERR_PTR(-ENOMEM);
+
+	return &cfqc->css;	
+}
+
+static void cfq_cgroup_destroy(struct cgroup_subsys *ss, struct cgroup *cont)
+{
+	kfree(cgroup_to_cfq_cgroup(cont));
+}
+
+struct cgroup_subsys cfq_subsys = {
+	.name = "cfq",
+	.create = cfq_cgroup_create,
+	.destroy = cfq_cgroup_destroy,
+	.subsys_id = cfq_subsys_id,
+};
diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h
index 1ddebfc..217ecb9 100644
--- a/include/linux/cgroup_subsys.h
+++ b/include/linux/cgroup_subsys.h
@@ -42,3 +42,9 @@ SUBSYS(mem_cgroup)
 #endif
 
 /* */
+
+#ifdef CONFIG_CGROUP_CFQ
+SUBSYS(cfq)
+#endif
+
+/* */
-- 
1.5.4.1


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/