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sysfs: Remove first pass at shadow directory support

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While shadow directories appear to be a good idea, the current scheme
of controlling their creation and destruction outside of sysfs appears
to be a locking and maintenance nightmare in the face of sysfs
directories dynamically coming and going.  Which can now occur for
directories containing network devices when CONFIG_SYSFS_DEPRECATED is
not set.

This patch removes everything from the initial shadow directory support
that allowed the shadow directory creation to be controlled at a higher
level.  So except for a few bits of sysfs_rename_dir everything from
commit b592fcfe7f is now gone.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Eric W. Biederman 2007-07-31 19:15:08 +09:00 • committed by Greg Kroah-Hartman
parent 869512ab5a
commit 90bc61359d
8 changed files with 33 additions and 229 deletions
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27
include/linux/sysfs.h
View file

@ -17,9 +17,6 @@
struct kobject;
struct module;
struct nameidata;
struct dentry;
struct sysfs_dirent;
/* FIXME
* The *owner field is no longer used, but leave around
@ -94,14 +91,13 @@ extern int sysfs_schedule_callback(struct kobject *kobj,
void (*func)(void *), void *data, struct module *owner);
extern int __must_check
sysfs_create_dir(struct kobject *kobj, struct sysfs_dirent *shadow_parent_sd);
sysfs_create_dir(struct kobject *);
extern void
sysfs_remove_dir(struct kobject *);
extern int __must_check
sysfs_rename_dir(struct kobject *kobj, struct sysfs_dirent *new_parent_sd,
const char *new_name);
sysfs_rename_dir(struct kobject *kobj, const char *new_name);
extern int __must_check
sysfs_move_dir(struct kobject *, struct kobject *);
@ -138,12 +134,6 @@ void sysfs_remove_file_from_group(struct kobject *kobj,
void sysfs_notify(struct kobject * k, char *dir, char *attr);
extern int sysfs_make_shadowed_dir(struct kobject *kobj,
void * (*follow_link)(struct dentry *, struct nameidata *));
extern struct sysfs_dirent *sysfs_create_shadow_dir(struct kobject *kobj);
extern void sysfs_remove_shadow_dir(struct sysfs_dirent *shadow_sd);
extern int __must_check sysfs_init(void);
#else /* CONFIG_SYSFS */
@ -154,8 +144,7 @@ static inline int sysfs_schedule_callback(struct kobject *kobj,
return -ENOSYS;
}
static inline int sysfs_create_dir(struct kobject *kobj,
struct sysfs_dirent *shadow_parent_sd)
static inline int sysfs_create_dir(struct kobject * kobj)
{
return 0;
}
@ -165,9 +154,7 @@ static inline void sysfs_remove_dir(struct kobject * k)
;
}
static inline int sysfs_rename_dir(struct kobject *kobj,
struct sysfs_dirent *new_parent_sd,
const char *new_name)
static inline int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
{
return 0;
}
@ -242,12 +229,6 @@ static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
{
}
static inline int sysfs_make_shadowed_dir(struct kobject *kobj,
void * (*follow_link)(struct dentry *, struct nameidata *))
{
return 0;
}
static inline int __must_check sysfs_init(void)
{
return 0;