Commit 52f7c21b authored by Mark Fasheh's avatar Mark Fasheh
Browse files

ocfs2: Move /sys/o2cb to /sys/fs/o2cb 



/sys/fs is where we really want file system specific sysfs objects.

Ocfs2-tools has been updated to look in /sys/fs/o2cb. We can maintain
backwards compatibility with old ocfs2-tools by using a sysfs symlink. After
some time (2 years), the symlink can be safely removed. This patch also adds
documentation to make it easier for people to figure out what /sys/fs/o2cb
is used for.

Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
parent a839c5af

Documentation/ABI/obsolete/o2cb

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What:		/sys/o2cb symlink

Date:		Dec 2005

KernelVersion:	2.6.16

Contact:	ocfs2-devel@oss.oracle.com

Description:	This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink will

		be removed when new versions of ocfs2-tools which know to look

		in /sys/fs/o2cb are sufficiently prevalent. Don't code new

		software to look here, it should try /sys/fs/o2cb instead.

		See Documentation/ABI/stable/o2cb for more information on usage.

Users:		ocfs2-tools. It's sufficient to mail proposed changes to

		ocfs2-devel@oss.oracle.com.

Documentation/ABI/stable/o2cb

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What:		/sys/fs/o2cb/ (was /sys/o2cb)

Date:		Dec 2005

KernelVersion:	2.6.16

Contact:	ocfs2-devel@oss.oracle.com

Description:	Ocfs2-tools looks at 'interface-revision' for versioning

		information. Each logmask/ file controls a set of debug prints

		and can be written into with the strings "allow", "deny", or

		"off". Reading the file returns the current state.

Users:		ocfs2-tools. It's sufficient to mail proposed changes to

		ocfs2-devel@oss.oracle.com.

Documentation/feature-removal-schedule.txt

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@@ -318,3 +318,13 @@ Why: Not used in-tree. The current out-of-tree users used it to 
	code / infrastructure should be in the kernel and not in some

	out-of-tree driver.

Who:	Thomas Gleixner <tglx@linutronix.de>



---------------------------



What:	/sys/o2cb symlink

When:	January 2010

Why:	/sys/fs/o2cb is the proper location for this information - /sys/o2cb

	exists as a symlink for backwards compatibility for old versions of

	ocfs2-tools. 2 years should be sufficient time to phase in new versions

	which know to look in /sys/fs/o2cb.

Who:	ocfs2-devel@oss.oracle.com

fs/ocfs2/cluster/sys.c

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@@ -57,6 +57,7 @@ static struct kset *o2cb_kset; 
void o2cb_sys_shutdown(void)

{

	mlog_sys_shutdown();

	sysfs_remove_link(NULL, "o2cb");

	kset_unregister(o2cb_kset);

}
@@ -68,6 +69,14 @@ int o2cb_sys_init(void) 
	if (!o2cb_kset)

		return -ENOMEM;



	/*

	 * Create this symlink for backwards compatibility with old

	 * versions of ocfs2-tools which look for things in /sys/o2cb.

	 */

	ret = sysfs_create_link(NULL, &o2cb_kset->kobj, "o2cb");

	if (ret)

		goto error;



	ret = sysfs_create_group(&o2cb_kset->kobj, &o2cb_attr_group);

	if (ret)

		goto error;

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