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sysfs: allow attributes to be added to groups

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This patch (as860) adds two new sysfs routines:
sysfs_add_file_to_group() and sysfs_remove_file_from_group().
A later patch adds code that uses the new routines.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2007-02-20 15:02:44 -05:00 committed by Greg Kroah-Hartman
parent b5e795f8df
commit dfa87c824a
2 changed files with 61 additions and 0 deletions
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44
fs/sysfs/file.c
View file

@ -501,6 +501,30 @@ int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
}
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
* @kobj: object we're acting for.
* @attr: attribute descriptor.
* @group: group name.
*/
int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
struct dentry *dir;
int error;
dir = lookup_one_len(group, kobj->dentry, strlen(group));
if (IS_ERR(dir))
error = PTR_ERR(dir);
else {
error = sysfs_add_file(dir, attr, SYSFS_KOBJ_ATTR);
dput(dir);
}
return error;
}
EXPORT_SYMBOL_GPL(sysfs_add_file_to_group);
/**
* sysfs_update_file - update the modified timestamp on an object attribute.
* @kobj: object we're acting for.
@ -586,6 +610,26 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
}
/**
* sysfs_remove_file_from_group - remove an attribute file from a group.
* @kobj: object we're acting for.
* @attr: attribute descriptor.
* @group: group name.
*/
void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
struct dentry *dir;
dir = lookup_one_len(group, kobj->dentry, strlen(group));
if (!IS_ERR(dir)) {
sysfs_hash_and_remove(dir, attr->name);
dput(dir);
}
}
EXPORT_SYMBOL_GPL(sysfs_remove_file_from_group);
EXPORT_SYMBOL_GPL(sysfs_create_file);
EXPORT_SYMBOL_GPL(sysfs_remove_file);
EXPORT_SYMBOL_GPL(sysfs_update_file);

17
include/linux/sysfs.h
View file

@ -126,6 +126,11 @@ void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
int __must_check sysfs_create_group(struct kobject *,
const struct attribute_group *);
void sysfs_remove_group(struct kobject *, const struct attribute_group *);
int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
void sysfs_notify(struct kobject * k, char *dir, char *attr);
@ -210,6 +215,18 @@ static inline void sysfs_remove_group(struct kobject * k, const struct attribute
;
}
static inline int sysfs_add_file_to_group(struct kobject *kobj,
const struct attribute *attr, const char *group)
{
return 0;
}
static inline void sysfs_remove_file_from_group(struct kobject *kobj,
const struct attribute *attr, const char *group);
{
;
}
static inline void sysfs_notify(struct kobject * k, char *dir, char *attr)
{
}