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authorEd Cashin <ecashin@coraid.com>2013-09-11 23:25:39 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-12 00:59:22 +0200
commit190519cd30884215a63ed875ac074dc97a602522 (patch)
treeb97b3a8171ed01e0a0cb60c3ee4d7745dea87fe4 /drivers/block
parentmm/zswap: use postorder iteration when destroying rbtree (diff)
downloadlinux-190519cd30884215a63ed875ac074dc97a602522.tar.xz
linux-190519cd30884215a63ed875ac074dc97a602522.zip
aoe: create and destroy debugfs directory for aoe
This series adds the debugging information that the coraid.com-distributed aoe driver exports via sysfs, but instead of sysfs, it uses debugfs. With these patches applied, even without AoE targets on the network, KEDR reports new possible memory leaks, but these are from callers outside the aoe driver that have used aoe_devnode to get the name of the character devices through the aoe_class->devnode callback, and I believe they're responsible for freeing that memory. This patch: Create and destroy the debugfs directory. Signed-off-by: Ed Cashin <ecashin@coraid.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/aoe/aoeblk.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 916d9ed5c8aa..cb508b754377 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;
}