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Subject[PATCH 16/22] sysfs: convert group implementation to use sd-based interface
Date
From
Reimplement group interface in terms of sd-based interface in
fs/sysfs/kobject.c.

This patch doesn't introduce any behavior change to the original API.

Signed-off-by: Tejun Heo <htejun@gmail.com>
---
fs/sysfs/Makefile | 3 +-
fs/sysfs/group.c | 87 ----------------------------------------------------
fs/sysfs/kobject.c | 72 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 73 insertions(+), 89 deletions(-)
delete mode 100644 fs/sysfs/group.c

diff --git a/fs/sysfs/Makefile b/fs/sysfs/Makefile
index f58bce9..b25ed0d 100644
--- a/fs/sysfs/Makefile
+++ b/fs/sysfs/Makefile
@@ -2,5 +2,4 @@
# Makefile for the sysfs virtual filesystem
#

-obj-y := inode.o file.o dir.o symlink.o mount.o bin.o \
- group.o kobject.o
+obj-y := inode.o file.o dir.o symlink.o mount.o bin.o kobject.o
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
deleted file mode 100644
index bb94f6a..0000000
--- a/fs/sysfs/group.c
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * fs/sysfs/group.c - Operations for adding/removing multiple files at once.
- *
- * Copyright (c) 2003 Patrick Mochel
- * Copyright (c) 2003 Open Source Development Lab
- *
- * This file is released undert the GPL v2.
- *
- */
-
-#include <linux/kobject.h>
-#include <linux/module.h>
-#include <linux/dcache.h>
-#include <linux/namei.h>
-#include <linux/err.h>
-#include "sysfs.h"
-
-
-static void remove_files(struct sysfs_dirent *dir_sd,
- const struct attribute_group *grp)
-{
- struct attribute *const* attr;
-
- for (attr = grp->attrs; *attr; attr++)
- sysfs_hash_and_remove(dir_sd, (*attr)->name);
-}
-
-static int create_files(struct sysfs_dirent *dir_sd,
- const struct attribute_group *grp)
-{
- struct attribute *const* attr;
- int error = 0;
-
- for (attr = grp->attrs; *attr && !error; attr++)
- error = __sysfs_add_file(dir_sd, *attr, SYSFS_FILE);
- if (error)
- remove_files(dir_sd, grp);
- return error;
-}
-
-
-int sysfs_create_group(struct kobject * kobj,
- const struct attribute_group * grp)
-{
- struct sysfs_dirent *sd;
- int error;
-
- BUG_ON(!kobj || !kobj->sd);
-
- if (grp->name) {
- sd = sysfs_add_dir(kobj->sd, grp->name, SYSFS_DIR_MODE, kobj);
- if (IS_ERR(sd))
- return PTR_ERR(sd);
- } else
- sd = kobj->sd;
- sysfs_get(sd);
- error = create_files(sd, grp);
- if (error) {
- if (grp->name)
- sysfs_remove(sd);
- }
- sysfs_put(sd);
- return error;
-}
-
-void sysfs_remove_group(struct kobject * kobj,
- const struct attribute_group * grp)
-{
- struct sysfs_dirent *dir_sd = kobj->sd;
- struct sysfs_dirent *sd;
-
- if (grp->name) {
- sd = sysfs_get_dirent(dir_sd, grp->name);
- BUG_ON(!sd);
- } else
- sd = sysfs_get(dir_sd);
-
- remove_files(sd, grp);
- if (grp->name)
- sysfs_remove(sd);
-
- sysfs_put(sd);
-}
-
-
-EXPORT_SYMBOL_GPL(sysfs_create_group);
-EXPORT_SYMBOL_GPL(sysfs_remove_group);
diff --git a/fs/sysfs/kobject.c b/fs/sysfs/kobject.c
index 7400575..0a0d583 100644
--- a/fs/sysfs/kobject.c
+++ b/fs/sysfs/kobject.c
@@ -413,6 +413,78 @@ void sysfs_remove_link(struct kobject * kobj, const char * name)
}
EXPORT_SYMBOL_GPL(sysfs_remove_link);

+/*
+ * group interface
+ */
+static void remove_files(struct sysfs_dirent *dir_sd,
+ const struct attribute_group *grp)
+{
+ struct attribute *const* attr;
+
+ for (attr = grp->attrs; *attr; attr++)
+ sysfs_remove_child(dir_sd, (*attr)->name);
+}
+
+static int create_files(struct kobject *kobj, struct sysfs_dirent *dir_sd,
+ const struct attribute_group *grp)
+{
+ struct attribute *const* attr;
+ struct sysfs_dirent *sd;
+
+ for (attr = grp->attrs; *attr; attr++) {
+ sd = sysfs_add_file(dir_sd, (*attr)->name, (*attr)->mode,
+ sysfs_attr_fops(kobj), (void *)*attr);
+ if (IS_ERR(sd)) {
+ remove_files(dir_sd, grp);
+ return PTR_ERR(sd);
+ }
+ }
+
+ return 0;
+}
+
+int sysfs_create_group(struct kobject *kobj, const struct attribute_group *grp)
+{
+ struct sysfs_dirent *sd;
+ int error;
+
+ BUG_ON(!kobj || !kobj->sd);
+
+ if (grp->name) {
+ sd = sysfs_add_dir(kobj->sd, grp->name,
+ SYSFS_DIR_MODE | SYSFS_COPY_NAME, kobj);
+ if (IS_ERR(sd))
+ return PTR_ERR(sd);
+ } else
+ sd = kobj->sd;
+ sysfs_get(sd);
+ error = create_files(kobj, sd, grp);
+ if (error && grp->name)
+ sysfs_remove(sd);
+ sysfs_put(sd);
+ return error;
+}
+EXPORT_SYMBOL_GPL(sysfs_create_group);
+
+void sysfs_remove_group(struct kobject *kobj, const struct attribute_group *grp)
+{
+ struct sysfs_dirent *dir_sd = kobj->sd;
+ struct sysfs_dirent *sd;
+
+ if (grp->name) {
+ sd = sysfs_get_dirent(dir_sd, grp->name);
+ BUG_ON(!sd);
+ } else
+ sd = sysfs_get(dir_sd);
+
+ remove_files(sd, grp);
+ if (grp->name)
+ sysfs_remove(sd);
+
+ sysfs_put(sd);
+}
+EXPORT_SYMBOL_GPL(sysfs_remove_group);
+
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
* @kobj: object we're acting for.
--
1.5.0.3

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