linux-kernel - [PATCH 3/4] dlm: Send lockspace name with uevents

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Date:	Fri, 26 Feb 2010 13:17:43 -0600
From:	David Teigland <teigland@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 3/4] dlm: Send lockspace name with uevents

From: Steven Whitehouse <swhiteho@...hat.com>

Although it is possible to get this information from the path,
its much easier to provide the lockspace as a seperate env
variable.

Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>
Signed-off-by: David Teigland <teigland@...hat.com>
---
 fs/dlm/lockspace.c |   14 +++++++++++++-
 1 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index c010ecf..26a8bd4 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -191,6 +191,18 @@ static int do_uevent(struct dlm_ls *ls, int in)
 	return error;
 }
 
+static int dlm_uevent(struct kset *kset, struct kobject *kobj,
+		      struct kobj_uevent_env *env)
+{
+	struct dlm_ls *ls = container_of(kobj, struct dlm_ls, ls_kobj);
+
+	add_uevent_var(env, "LOCKSPACE=%s", ls->ls_name);
+	return 0;
+}
+
+static struct kset_uevent_ops dlm_uevent_ops = {
+	.uevent = dlm_uevent,
+};
 
 int __init dlm_lockspace_init(void)
 {
@@ -199,7 +211,7 @@ int __init dlm_lockspace_init(void)
 	INIT_LIST_HEAD(&lslist);
 	spin_lock_init(&lslist_lock);
 
-	dlm_kset = kset_create_and_add("dlm", NULL, kernel_kobj);
+	dlm_kset = kset_create_and_add("dlm", &dlm_uevent_ops, kernel_kobj);
 	if (!dlm_kset) {
 		printk(KERN_WARNING "%s: can not create kset\n", __func__);
 		return -ENOMEM;
-- 
1.6.6

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