struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type)
{
char *dup_name = NULL;
- struct sysfs_dirent *sd = NULL;
+ struct sysfs_dirent *sd;
if (type & SYSFS_COPY_NAME) {
name = dup_name = kstrdup(name, GFP_KERNEL);
if (!name)
- goto err_out;
+ return NULL;
}
sd = kmem_cache_zalloc(sysfs_dir_cachep, GFP_KERNEL);
if (!sd)
- goto err_out;
+ goto err_out1;
if (sysfs_alloc_ino(&sd->s_ino))
- goto err_out;
+ goto err_out2;
atomic_set(&sd->s_count, 1);
atomic_set(&sd->s_active, 0);
return sd;
- err_out:
- kfree(dup_name);
+ err_out2:
kmem_cache_free(sysfs_dir_cachep, sd);
+ err_out1:
+ kfree(dup_name);
return NULL;
}
/* link in */
sysfs_addrm_start(&acxt, parent_sd);
+
if (!sysfs_find_dirent(parent_sd, name)) {
sysfs_add_one(&acxt, sd);
sysfs_link_sibling(sd);
}
- if (sysfs_addrm_finish(&acxt)) {
- *p_sd = sd;
- return 0;
+
+ if (!sysfs_addrm_finish(&acxt)) {
+ sysfs_put(sd);
+ return -EEXIST;
}
- sysfs_put(sd);
- return -EEXIST;
+ *p_sd = sd;
+ return 0;
}
int sysfs_create_subdir(struct kobject *kobj, const char *name,
static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
+ struct dentry *ret = NULL;
struct sysfs_dirent * parent_sd = dentry->d_parent->d_fsdata;
struct sysfs_dirent * sd;
struct bin_attribute *bin_attr;
struct inode *inode;
int found = 0;
+ mutex_lock(&sysfs_mutex);
+
for (sd = parent_sd->s_children; sd; sd = sd->s_sibling) {
if (sysfs_type(sd) &&
!strcmp(sd->s_name, dentry->d_name.name)) {
/* no such entry */
if (!found)
- return NULL;
+ goto out_unlock;
/* attach dentry and inode */
inode = sysfs_get_inode(sd);
- if (!inode)
- return ERR_PTR(-ENOMEM);
-
- mutex_lock(&sysfs_mutex);
+ if (!inode) {
+ ret = ERR_PTR(-ENOMEM);
+ goto out_unlock;
+ }
if (inode->i_state & I_NEW) {
/* initialize inode according to type */
sysfs_instantiate(dentry, inode);
sysfs_attach_dentry(sd, dentry);
+ out_unlock:
mutex_unlock(&sysfs_mutex);
-
- return NULL;
+ return ret;
}
const struct inode_operations sysfs_dir_inode_operations = {
if (error)
goto out_drop;
+ mutex_lock(&sysfs_mutex);
+
dup_name = sd->s_name;
sd->s_name = new_name;
d_add(new_dentry, NULL);
d_move(sd->s_dentry, new_dentry);
- mutex_lock(&sysfs_mutex);
-
sysfs_unlink_sibling(sd);
sysfs_get(new_parent_sd);
sysfs_put(sd->s_parent);