int sysfs_add_file(struct dentry * dir, const struct attribute * attr)
{
struct dentry * dentry;
int error;
down(&dir->d_inode->i_sem);
dentry = sysfs_get_dentry(dir,attr->name);
if (!IS_ERR(dentry)) {
error = sysfs_create(dentry,
(attr->mode & S_IALLUGO) | S_IFREG,
init_file);
if (!error)
dentry->d_fsdata = (void *)attr;
dput(dentry);
} else
error = PTR_ERR(dentry);
up(&dir->d_inode->i_sem);
return error;
}
static int create_dir(struct kobject * k, struct dentry * p,
const char * n, struct dentry ** d)
{
int error;
down(&p->d_inode->i_sem);
*d = sysfs_get_dentry(p,n);
if (!IS_ERR(*d)) {
error = sysfs_create(*d,
S_IFDIR| S_IRWXU | S_IRUGO | S_IXUGO,
init_dir);
if (!error) {
(*d)->d_fsdata = k;
p->d_inode->i_nlink++;
}
dput(*d);
} else
error = PTR_ERR(*d);
up(&p->d_inode->i_sem);
return error;
}
/**
* sysfs_create_link - create symlink between two objects.
* @kobj: object whose directory we're creating the link in.
* @target: object we're pointing to.
* @name: name of the symlink.
*/
int sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name)
{
struct dentry * dentry = kobj->dentry;
struct dentry * d;
int error = 0;
down(&dentry->d_inode->i_sem);
d = sysfs_get_dentry(dentry,name);
if (!IS_ERR(d)) {
error = sysfs_create(d, S_IFLNK|S_IRWXUGO, init_symlink);
if (!error)
/*
* associate the link dentry with the target kobject
*/
d->d_fsdata = kobject_get(target);
dput(d);
} else
error = PTR_ERR(d);
up(&dentry->d_inode->i_sem);
return error;
}
int sysfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
{
return sysfs_create(dentry, mode, NULL);
}