---

yaml --- r: 262300 b: refs/heads/master c: dd48c08 h: refs/heads/master v: v3
git-mirror · Aug 4, 2011 · 3c841ff · 3c841ff
1 parent 9292886
commit 3c841ff
Show file tree

Hide file tree

Showing 8 changed files with 34 additions and 47 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f48d1915b86f06a943087e5f9b29542a1ef4cd4d
+refs/heads/master: dd48c085c1cdf9446f92826f1fd451167fb6c2fd
diff --git a/trunk/Documentation/fault-injection/fault-injection.txt b/trunk/Documentation/fault-injection/fault-injection.txt
@@ -143,8 +143,7 @@ o provide a way to configure fault attributes
   failslab, fail_page_alloc, and fail_make_request use this way.
   Helper functions:
 
-	init_fault_attr_dentries(entries, attr, name);
-	void cleanup_fault_attr_dentries(entries);
+	fault_create_debugfs_attr(name, parent, attr);
 
 - module parameters
 

diff --git a/trunk/block/blk-core.c b/trunk/block/blk-core.c
@@ -1368,8 +1368,10 @@ static bool should_fail_request(struct hd_struct *part, unsigned int bytes)
 
 static int __init fail_make_request_debugfs(void)
 {
-	return init_fault_attr_dentries(&fail_make_request,
-					"fail_make_request");
+	struct dentry *dir = fault_create_debugfs_attr("fail_make_request",
+						NULL, &fail_make_request);
+
+	return IS_ERR(dir) ? PTR_ERR(dir) : 0;
 }
 
 late_initcall(fail_make_request_debugfs);

diff --git a/trunk/block/blk-timeout.c b/trunk/block/blk-timeout.c
@@ -28,7 +28,10 @@ int blk_should_fake_timeout(struct request_queue *q)
 
 static int __init fail_io_timeout_debugfs(void)
 {
-	return init_fault_attr_dentries(&fail_io_timeout, "fail_io_timeout");
+	struct dentry *dir = fault_create_debugfs_attr("fail_io_timeout",
+						NULL, &fail_io_timeout);
+
+	return IS_ERR(dir) ? PTR_ERR(dir) : 0;
 }
 
 late_initcall(fail_io_timeout_debugfs);

diff --git a/trunk/include/linux/fault-inject.h b/trunk/include/linux/fault-inject.h
@@ -25,10 +25,6 @@ struct fault_attr {
 	unsigned long reject_end;
 
 	unsigned long count;
-
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-	struct dentry *dir;
-#endif
 };
 
 #define FAULT_ATTR_INITIALIZER {				\
@@ -45,19 +41,15 @@ bool should_fail(struct fault_attr *attr, ssize_t size);
 
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 
-int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
-void cleanup_fault_attr_dentries(struct fault_attr *attr);
+struct dentry *fault_create_debugfs_attr(const char *name,
+			struct dentry *parent, struct fault_attr *attr);
 
 #else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
 
-static inline int init_fault_attr_dentries(struct fault_attr *attr,
-					  const char *name)
-{
-	return -ENODEV;
-}
-
-static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
+static inline struct dentry *fault_create_debugfs_attr(const char *name,
+			struct dentry *parent, struct fault_attr *attr)
 {
+	return ERR_PTR(-ENODEV);
 }
 
 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */

diff --git a/trunk/lib/fault-inject.c b/trunk/lib/fault-inject.c
@@ -197,21 +197,15 @@ static struct dentry *debugfs_create_atomic_t(const char *name, mode_t mode,
 	return debugfs_create_file(name, mode, parent, value, &fops_atomic_t);
 }
 
-void cleanup_fault_attr_dentries(struct fault_attr *attr)
-{
-	debugfs_remove_recursive(attr->dir);
-}
-
-int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
+struct dentry *fault_create_debugfs_attr(const char *name,
+			struct dentry *parent, struct fault_attr *attr)
 {
 	mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
 	struct dentry *dir;
 
-	dir = debugfs_create_dir(name, NULL);
+	dir = debugfs_create_dir(name, parent);
 	if (!dir)
-		return -ENOMEM;
-
-	attr->dir = dir;
+		return ERR_PTR(-ENOMEM);
 
 	if (!debugfs_create_ul("probability", mode, dir, &attr->probability))
 		goto fail;
@@ -243,11 +237,11 @@ int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
 
 #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
 
-	return 0;
+	return dir;
 fail:
-	debugfs_remove_recursive(attr->dir);
+	debugfs_remove_recursive(dir);
 
-	return -ENOMEM;
+	return ERR_PTR(-ENOMEM);
 }
 
 #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
diff --git a/trunk/mm/failslab.c b/trunk/mm/failslab.c
@@ -34,23 +34,23 @@ __setup("failslab=", setup_failslab);
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 static int __init failslab_debugfs_init(void)
 {
+	struct dentry *dir;
 	mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
-	int err;
 
-	err = init_fault_attr_dentries(&failslab.attr, "failslab");
-	if (err)
-		return err;
+	dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
+	if (IS_ERR(dir))
+		return PTR_ERR(dir);
 
-	if (!debugfs_create_bool("ignore-gfp-wait", mode, failslab.attr.dir,
+	if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
 				&failslab.ignore_gfp_wait))
 		goto fail;
-	if (!debugfs_create_bool("cache-filter", mode, failslab.attr.dir,
+	if (!debugfs_create_bool("cache-filter", mode, dir,
 				&failslab.cache_filter))
 		goto fail;
 
 	return 0;
 fail:
-	cleanup_fault_attr_dentries(&failslab.attr);
+	debugfs_remove_recursive(dir);
 
 	return -ENOMEM;
 }

diff --git a/trunk/mm/page_alloc.c b/trunk/mm/page_alloc.c
@@ -1409,14 +1409,11 @@ static int __init fail_page_alloc_debugfs(void)
 {
 	mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
 	struct dentry *dir;
-	int err;
 
-	err = init_fault_attr_dentries(&fail_page_alloc.attr,
-				       "fail_page_alloc");
-	if (err)
-		return err;
-
-	dir = fail_page_alloc.attr.dir;
+	dir = fault_create_debugfs_attr("fail_page_alloc", NULL,
+					&fail_page_alloc.attr);
+	if (IS_ERR(dir))
+		return PTR_ERR(dir);
 
 	if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
 				&fail_page_alloc.ignore_gfp_wait))
@@ -1430,7 +1427,7 @@ static int __init fail_page_alloc_debugfs(void)
 
 	return 0;
 fail:
-	cleanup_fault_attr_dentries(&fail_page_alloc.attr);
+	debugfs_remove_recursive(dir);
 
 	return -ENOMEM;
 }