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sysfs, kernfs: add skeletons for kernfs

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Core sysfs implementation will be separated into kernfs so that it can
be used by other non-kobject users.

This patch creates fs/kernfs/ directory and makes boilerplate changes.
kernfs interface will be directly based on sysfs_dirent and its
forward declaration is moved to include/linux/kernfs.h which is
included from include/linux/sysfs.h.  sysfs core implementation will
be gradually separated out and moved to kernfs.

This patch doesn't introduce any functional changes.

v2: mount.c added.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tejun Heo 2013-11-24 09:54:58 -05:00 committed by Greg Kroah-Hartman
parent ae2108ad32
commit b8441ed279
9 changed files with 64 additions and 3 deletions
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2
fs/Makefile
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@ -53,7 +53,7 @@ obj-$(CONFIG_FHANDLE) += fhandle.o
obj-y += quota/
obj-$(CONFIG_PROC_FS) += proc/
obj-$(CONFIG_SYSFS) += sysfs/
obj-$(CONFIG_SYSFS) += sysfs/ kernfs/
obj-$(CONFIG_CONFIGFS_FS) += configfs/
obj-y += devpts/

5
fs/kernfs/Makefile Normal file
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@ -0,0 +1,5 @@
#
# Makefile for the kernfs pseudo filesystem
#
obj-y := mount.o inode.o dir.o file.o symlink.o

9
fs/kernfs/dir.c Normal file
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@ -0,0 +1,9 @@
/*
* fs/kernfs/dir.c - kernfs directory implementation
*
* Copyright (c) 2001-3 Patrick Mochel
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/

9
fs/kernfs/file.c Normal file
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@ -0,0 +1,9 @@
/*
* fs/kernfs/file.c - kernfs file implementation
*
* Copyright (c) 2001-3 Patrick Mochel
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/

9
fs/kernfs/inode.c Normal file
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@ -0,0 +1,9 @@
/*
* fs/kernfs/inode.c - kernfs inode implementation
*
* Copyright (c) 2001-3 Patrick Mochel
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/

9
fs/kernfs/mount.c Normal file
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@ -0,0 +1,9 @@
/*
* fs/kernfs/mount.c - kernfs mount implementation
*
* Copyright (c) 2001-3 Patrick Mochel
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/

9
fs/kernfs/symlink.c Normal file
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@ -0,0 +1,9 @@
/*
* fs/kernfs/symlink.c - kernfs symlink implementation
*
* Copyright (c) 2001-3 Patrick Mochel
* Copyright (c) 2007 SUSE Linux Products GmbH
* Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
*
* This file is released under the GPLv2.
*/

12
include/linux/kernfs.h Normal file
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@ -0,0 +1,12 @@
/*
* kernfs.h - pseudo filesystem decoupled from vfs locking
*
* This file is released under the GPLv2.
*/
#ifndef __LINUX_KERNFS_H
#define __LINUX_KERNFS_H
struct sysfs_dirent;
#endif /* __LINUX_KERNFS_H */

3
include/linux/sysfs.h
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@ -12,6 +12,7 @@
#ifndef _SYSFS_H_
#define _SYSFS_H_
#include <linux/kernfs.h>
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/list.h>
@ -175,8 +176,6 @@ struct sysfs_ops {
ssize_t (*store)(struct kobject *, struct attribute *, const char *, size_t);
};
struct sysfs_dirent;
#ifdef CONFIG_SYSFS
int sysfs_schedule_callback(struct kobject *kobj, void (*func)(void *),