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sysfs: Add sysfs_add/remove_files utility functions

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Adding/Removing a whole array of attributes is very common. Add a standard
utility function to do this with a simple function call, instead of
requiring drivers to open code this.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andi Kleen 2010-01-05 12:48:01 +01:00 committed by Greg Kroah-Hartman
parent 265d2e2e31
commit 1c205ae18d
2 changed files with 34 additions and 0 deletions
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20
fs/sysfs/file.c
View File

@ -542,6 +542,18 @@ int sysfs_create_file(struct kobject * kobj, const struct attribute * attr)
}
int sysfs_create_files(struct kobject *kobj, const struct attribute **ptr)
{
int err = 0;
int i;
for (i = 0; ptr[i] && !err; i++)
err = sysfs_create_file(kobj, ptr[i]);
if (err)
while (--i >= 0)
sysfs_remove_file(kobj, ptr[i]);
return err;
}
/**
* sysfs_add_file_to_group - add an attribute file to a pre-existing group.
@ -614,6 +626,12 @@ void sysfs_remove_file(struct kobject * kobj, const struct attribute * attr)
sysfs_hash_and_remove(kobj->sd, attr->name);
}
void sysfs_remove_files(struct kobject * kobj, const struct attribute **ptr)
{
int i;
for (i = 0; ptr[i]; i++)
sysfs_remove_file(kobj, ptr[i]);
}
/**
* sysfs_remove_file_from_group - remove an attribute file from a group.
@ -732,3 +750,5 @@ EXPORT_SYMBOL_GPL(sysfs_schedule_callback);
EXPORT_SYMBOL_GPL(sysfs_create_file);
EXPORT_SYMBOL_GPL(sysfs_remove_file);
EXPORT_SYMBOL_GPL(sysfs_remove_files);
EXPORT_SYMBOL_GPL(sysfs_create_files);

14
include/linux/sysfs.h
View File

@ -94,9 +94,12 @@ int __must_check sysfs_move_dir(struct kobject *kobj,
int __must_check sysfs_create_file(struct kobject *kobj,
const struct attribute *attr);
int __must_check sysfs_create_files(struct kobject *kobj,
const struct attribute **attr);
int __must_check sysfs_chmod_file(struct kobject *kobj, struct attribute *attr,
mode_t mode);
void sysfs_remove_file(struct kobject *kobj, const struct attribute *attr);
void sysfs_remove_files(struct kobject *kobj, const struct attribute **attr);
int __must_check sysfs_create_bin_file(struct kobject *kobj,
const struct bin_attribute *attr);
@ -164,6 +167,12 @@ static inline int sysfs_create_file(struct kobject *kobj,
return 0;
}
static inline int sysfs_create_files(struct kobject *kobj,
const struct attribute **attr)
{
return 0;
}
static inline int sysfs_chmod_file(struct kobject *kobj,
struct attribute *attr, mode_t mode)
{
@ -175,6 +184,11 @@ static inline void sysfs_remove_file(struct kobject *kobj,
{
}
static inline void sysfs_remove_files(struct kobject *kobj,
const struct attribute **attr)
{
}
static inline int sysfs_create_bin_file(struct kobject *kobj,
const struct bin_attribute *attr)
{