linux-kernel - [PATCH 1/6] aoe: create and destroy debugfs directory for aoe

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Message-Id: <1c323e57ec5644ed7415c143d4406c7ab037bdc5.1374610591.git.ecashin@coraid.com>
Date:	Tue, 23 Jul 2013 17:09:03 -0400
From:	Ed Cashin <ecashin@...aid.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, ecashin@...aid.com
Subject:  [PATCH 1/6] aoe: create and destroy debugfs directory for aoe

Signed-off-by: Ed Cashin <ecashin@...aid.com>
---
 drivers/block/aoe/aoeblk.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 916d9ed..cb508b7 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -17,11 +17,13 @@
 #include <linux/mutex.h>
 #include <linux/export.h>
 #include <linux/moduleparam.h>
+#include <linux/debugfs.h>
 #include <scsi/sg.h>
 #include "aoe.h"
 
 static DEFINE_MUTEX(aoeblk_mutex);
 static struct kmem_cache *buf_pool_cache;
+static struct dentry *aoe_debugfs_dir;
 
 /* GPFS needs a larger value than the default. */
 static int aoe_maxsectors;
@@ -351,6 +353,8 @@ err:
 void
 aoeblk_exit(void)
 {
+	debugfs_remove_recursive(aoe_debugfs_dir);
+	aoe_debugfs_dir = NULL;
 	kmem_cache_destroy(buf_pool_cache);
 }
 
@@ -362,7 +366,11 @@ aoeblk_init(void)
 					   0, 0, NULL);
 	if (buf_pool_cache == NULL)
 		return -ENOMEM;
-
+	aoe_debugfs_dir = debugfs_create_dir("aoe", NULL);
+	if (IS_ERR_OR_NULL(aoe_debugfs_dir)) {
+		pr_info("aoe: cannot create debugfs directory\n");
+		aoe_debugfs_dir = NULL;
+	}
 	return 0;
 }
 
-- 
1.7.1

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