return sd;
}
+/*
+ *
+ * Return -EEXIST if there is already a sysfs element with the same name for
+ * the same parent.
+ *
+ * called with parent inode's i_mutex held
+ */
+int sysfs_dirent_exist(struct sysfs_dirent *parent_sd,
+ const unsigned char *new)
+{
+ struct sysfs_dirent * sd;
+
+ list_for_each_entry(sd, &parent_sd->s_children, s_sibling) {
+ if (sd->s_element) {
+ const unsigned char *existing = sysfs_get_name(sd);
+ if (strcmp(existing, new))
+ continue;
+ else
+ return -EEXIST;
+ }
+ }
+
+ return 0;
+}
+
+
int sysfs_make_dirent(struct sysfs_dirent * parent_sd, struct dentry * dentry,
void * element, umode_t mode, int type)
{
mutex_lock(&p->d_inode->i_mutex);
*d = lookup_one_len(n, p, strlen(n));
if (!IS_ERR(*d)) {
- error = sysfs_make_dirent(p->d_fsdata, *d, k, mode, SYSFS_DIR);
+ if (sysfs_dirent_exist(p->d_fsdata, n))
+ error = -EEXIST;
+ else
+ error = sysfs_make_dirent(p->d_fsdata, *d, k, mode,
+ SYSFS_DIR);
if (!error) {
error = sysfs_create(*d, mode, init_dir);
if (!error) {
* Drop reference from dget() on entrance.
*/
dput(dentry);
+ kobj->dentry = NULL;
}
int sysfs_rename_dir(struct kobject * kobj, const char *new_name)
return offset;
}
-struct file_operations sysfs_dir_operations = {
+const struct file_operations sysfs_dir_operations = {
.open = sysfs_dir_open,
.release = sysfs_dir_close,
.llseek = sysfs_dir_lseek,
.read = generic_read_dir,
.readdir = sysfs_readdir,
};
-
-EXPORT_SYMBOL_GPL(sysfs_create_dir);
-EXPORT_SYMBOL_GPL(sysfs_remove_dir);
-EXPORT_SYMBOL_GPL(sysfs_rename_dir);