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Message-Id: <1237439565-25039-2-git-send-email-hooanon05@yahoo.co.jp>
Date: Thu, 19 Mar 2009 14:12:44 +0900
From: "J. R. Okajima" <hooanon05@...oo.co.jp>
To: greg@...ah.com
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
"J. R. Okajima" <hooanon05@...oo.co.jp>
Subject: [RFC Aufs2 #3 1/2] replace /sys/fs/aufs/debug by /sys/module/aufs/parmaters/debug
Follow the comments from Greg KH on LKML.
- remove the global variable 'au_cond'.
- new global variable 'aufs_debug' as a module parameter.
- describe the new module parameter 'debug' in the manual.
- remove the global variable 'sysaufs_ktype', debug_show(),
debug_store(), au_debug_attr, au_attr_show(), au_attr_store(), and
sysaufs_ktype_body.
- make au_attr empty.
Signed-off-by: J. R. Okajima <hooanon05@...oo.co.jp>
---
Documentation/filesystems/aufs/aufs.5 | 8 ++++
fs/aufs/debug.c | 4 +-
fs/aufs/debug.h | 12 ++---
fs/aufs/sysaufs.h | 2 -
fs/aufs/sysfs.c | 73 ---------------------------------
5 files changed, 16 insertions(+), 83 deletions(-)
diff --git a/Documentation/filesystems/aufs/aufs.5 b/Documentation/filesystems/aufs/aufs.5
index 0b485ea..b3bca05 100644
--- a/Documentation/filesystems/aufs/aufs.5
+++ b/Documentation/filesystems/aufs/aufs.5
@@ -361,6 +361,14 @@ If your linux version is linux\-2.6.24 and earlier, you need to enable
CONFIG_AUFS_SYSAUFS too.
Currently this is for developers only.
The default is \[oq]a\[cq].
+.
+.TP
+.B debug= 0 | 1
+Specifies disable(0) or enable(1) debug print in aufs.
+This parameter can be changed dynamically.
+You need to enable CONFIG_AUFS_DEBUG.
+Currently this is for developers only.
+The default is \[oq]0\[cq] (disable).
.\" ----------------------------------------------------------------------
.SH Branch Syntax
diff --git a/fs/aufs/debug.c b/fs/aufs/debug.c
index e8bc59c..63ec24f 100644
--- a/fs/aufs/debug.c
+++ b/fs/aufs/debug.c
@@ -13,7 +13,9 @@
#include "aufs.h"
-atomic_t au_cond = ATOMIC_INIT(0);
+int aufs_debug;
+MODULE_PARM_DESC(debug, "debug print");
+module_param_named(debug, aufs_debug, int, S_IRUGO | S_IWUSR | S_IWGRP);
char *au_plevel = KERN_DEBUG;
#define dpri(fmt, arg...) do { \
diff --git a/fs/aufs/debug.h b/fs/aufs/debug.h
index 0b377a8..36ff0ea 100644
--- a/fs/aufs/debug.h
+++ b/fs/aufs/debug.h
@@ -25,20 +25,18 @@
#ifdef CONFIG_AUFS_DEBUG
#define AuDebugOn(a) BUG_ON(a)
-extern atomic_t au_cond;
+
+/* module parameter */
+extern int aufs_debug;
static inline void au_debug(int n)
{
- atomic_set(&au_cond, n);
+ aufs_debug = n;
smp_mb();
}
static inline int au_debug_test(void)
{
- int ret;
-
- ret = atomic_read(&au_cond);
- smp_mb();
- return ret;
+ return aufs_debug;
}
#else
#define AuDebugOn(a) do {} while (0)
diff --git a/fs/aufs/sysaufs.h b/fs/aufs/sysaufs.h
index 04ffab2..60b18a8 100644
--- a/fs/aufs/sysaufs.h
+++ b/fs/aufs/sysaufs.h
@@ -47,7 +47,6 @@ struct au_branch;
#ifdef CONFIG_SYSFS
/* sysfs.c */
extern struct attribute_group *sysaufs_attr_group;
-extern struct kobj_type *sysaufs_ktype;
int sysaufs_si_xino(struct seq_file *seq, struct super_block *sb);
ssize_t sysaufs_si_show(struct kobject *kobj, struct attribute *attr,
@@ -61,7 +60,6 @@ void sysaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex);
#else
#define sysaufs_attr_group NULL
-#define sysaufs_ktype NULL
static inline
int sysaufs_si_xino(struct seq_file *seq, struct super_block *sb)
diff --git a/fs/aufs/sysfs.c b/fs/aufs/sysfs.c
index b03c2f7..2112f3b 100644
--- a/fs/aufs/sysfs.c
+++ b/fs/aufs/sysfs.c
@@ -16,36 +16,7 @@
#include <linux/sysfs.h>
#include "aufs.h"
-#ifdef CONFIG_AUFS_DEBUG
-static ssize_t debug_show(struct kobject *kobj __maybe_unused,
- struct kobj_attribute *attr __maybe_unused,
- char *buf)
-{
- return sprintf(buf, "%d\n", au_debug_test());
-}
-
-static ssize_t debug_store(struct kobject *kobj __maybe_unused,
- struct kobj_attribute *attr __maybe_unused,
- const char *buf, size_t sz)
-{
- if (unlikely(!sz || (*buf != '0' && *buf != '1')))
- return -EOPNOTSUPP;
-
- if (*buf == '0')
- au_debug(0);
- else if (*buf == '1')
- au_debug(1);
- return sz;
-}
-
-static struct kobj_attribute au_debug_attr = __ATTR(debug, S_IRUGO | S_IWUSR,
- debug_show, debug_store);
-#endif
-
static struct attribute *au_attr[] = {
-#ifdef CONFIG_AUFS_DEBUG
- &au_debug_attr.attr,
-#endif
NULL, /* need to NULL terminate the list of attributes */
};
@@ -57,50 +28,6 @@ struct attribute_group *sysaufs_attr_group = &sysaufs_attr_group_body;
/* ---------------------------------------------------------------------- */
-/*
- * they are copied from linux/lib/kobject.c,
- * and will be exported in the future.
- */
-static ssize_t au_attr_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- struct kobj_attribute *kattr;
- ssize_t ret = -EIO;
-
- kattr = container_of(attr, struct kobj_attribute, attr);
- if (kattr->show)
- ret = kattr->show(kobj, kattr, buf);
- return ret;
-}
-
-#ifdef CONFIG_AUFS_DEBUG
-static ssize_t au_attr_store(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t count)
-{
- struct kobj_attribute *kattr;
- ssize_t ret = -EIO;
-
- kattr = container_of(attr, struct kobj_attribute, attr);
- if (kattr->store)
- ret = kattr->store(kobj, kattr, buf, count);
- return ret;
-}
-#endif
-
-static struct sysfs_ops sysaufs_ops = {
- .show = au_attr_show,
-#ifdef CONFIG_AUFS_DEBUG
- .store = au_attr_store
-#endif
-};
-
-static struct kobj_type sysaufs_ktype_body = {
- .sysfs_ops = &sysaufs_ops
-};
-struct kobj_type *sysaufs_ktype = &sysaufs_ktype_body;
-
-/* ---------------------------------------------------------------------- */
-
static int sysaufs_sbi_xi(struct seq_file *seq, struct file *xf,
struct kstat *st)
{
--
1.6.1.284.g5dc13
--
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