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aoe: create and destroy debugfs directory for aoe

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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>
This commit is contained in:
Ed Cashin 2013-09-11 14:25:39 -07:00 committed by Linus Torvalds
parent 0bd42136f7
commit 190519cd30
1 changed files with 9 additions and 1 deletions
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10
drivers/block/aoe/aoeblk.c
View file

@ -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 @@ aoeblk_gdalloc(void *vp)
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;
}