5d60418e54
Introduce kernfs setattr interface - kernfs_setattr(). sysfs_sd_setattr() is renamed to __kernfs_setattr() and kernfs_setattr() is a simple wrapper around it with sysfs_mutex locking. sysfs_chmod_file() is updated to get an explicit ref on kobj->sd and then invoke kernfs_setattr() so that it doesn't have to use internal interface. This patch doesn't introduce any behavior differences. v2: Dummy implementation for !CONFIG_SYSFS updated to return -ENOSYS. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
|
|
* kernfs.h - pseudo filesystem decoupled from vfs locking
|
|
*
|
|
* This file is released under the GPLv2.
|
|
*/
|
|
|
|
#ifndef __LINUX_KERNFS_H
|
|
#define __LINUX_KERNFS_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/err.h>
|
|
|
|
struct file;
|
|
struct iattr;
|
|
|
|
struct sysfs_dirent;
|
|
|
|
#ifdef CONFIG_SYSFS
|
|
|
|
struct sysfs_dirent *kernfs_create_link(struct sysfs_dirent *parent,
|
|
const char *name,
|
|
struct sysfs_dirent *target);
|
|
void kernfs_remove(struct sysfs_dirent *sd);
|
|
int kernfs_remove_by_name_ns(struct sysfs_dirent *parent, const char *name,
|
|
const void *ns);
|
|
int kernfs_rename_ns(struct sysfs_dirent *sd, struct sysfs_dirent *new_parent,
|
|
const char *new_name, const void *new_ns);
|
|
int kernfs_setattr(struct sysfs_dirent *sd, const struct iattr *iattr);
|
|
|
|
#else /* CONFIG_SYSFS */
|
|
|
|
static inline struct sysfs_dirent *
|
|
kernfs_create_link(struct sysfs_dirent *parent, const char *name,
|
|
struct sysfs_dirent *target)
|
|
{ return ERR_PTR(-ENOSYS); }
|
|
|
|
static inline void kernfs_remove(struct sysfs_dirent *sd) { }
|
|
|
|
static inline int kernfs_remove_by_name_ns(struct sysfs_dirent *parent,
|
|
const char *name, const void *ns)
|
|
{ return -ENOSYS; }
|
|
|
|
static inline int kernfs_rename_ns(struct sysfs_dirent *sd,
|
|
struct sysfs_dirent *new_parent,
|
|
const char *new_name, const void *new_ns)
|
|
{ return -ENOSYS; }
|
|
|
|
static inline int kernfs_setattr(struct sysfs_dirent *sd,
|
|
const struct iattr *iattr)
|
|
{ return -ENOSYS; }
|
|
|
|
#endif /* CONFIG_SYSFS */
|
|
|
|
static inline int kernfs_remove_by_name(struct sysfs_dirent *parent,
|
|
const char *name)
|
|
{
|
|
return kernfs_remove_by_name_ns(parent, name, NULL);
|
|
}
|
|
|
|
#endif /* __LINUX_KERNFS_H */
|