diff options
| -rw-r--r-- | fs/sysfs/dir.c | 73 |
1 files changed, 41 insertions, 32 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index b4c482461403..90bed5df254f 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -452,8 +452,9 @@ void sysfs_remove_dir(struct kobject * kobj) int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent, const char *new_name) { - int error = 0; + int error; struct dentry * new_dentry; + struct sysfs_dirent *sd, *parent_sd; if (!new_parent) return -EFAULT; @@ -462,40 +463,48 @@ int sysfs_rename_dir(struct kobject * kobj, struct dentry *new_parent, mutex_lock(&new_parent->d_inode->i_mutex); new_dentry = lookup_one_len(new_name, new_parent, strlen(new_name)); - if (!IS_ERR(new_dentry)) { - /* By allowing two different directories with the - * same d_parent we allow this routine to move - * between different shadows of the same directory - */ - if (kobj->dentry->d_parent->d_inode != new_parent->d_inode) - return -EINVAL; - else if (new_dentry->d_parent->d_inode != new_parent->d_inode) - error = -EINVAL; - else if (new_dentry == kobj->dentry) - error = -EINVAL; - else if (!new_dentry->d_inode) { - error = kobject_set_name(kobj, "%s", new_name); - if (!error) { - struct sysfs_dirent *sd, *parent_sd; - - d_add(new_dentry, NULL); - d_move(kobj->dentry, new_dentry); - - sd = kobj->dentry->d_fsdata; - parent_sd = new_parent->d_fsdata; - - list_del_init(&sd->s_sibling); - list_add(&sd->s_sibling, &parent_sd->s_children); - } - else - d_drop(new_dentry); - } else - error = -EEXIST; - dput(new_dentry); + if (IS_ERR(new_dentry)) { + error = PTR_ERR(new_dentry); + goto out_unlock; } + + /* By allowing two different directories with the same + * d_parent we allow this routine to move between different + * shadows of the same directory + */ + error = -EINVAL; + if (kobj->dentry->d_parent->d_inode != new_parent->d_inode || + new_dentry->d_parent->d_inode != new_parent->d_inode || + new_dentry == kobj->dentry) + goto out_dput; + + error = -EEXIST; + if (new_dentry->d_inode) + goto out_dput; + + error = kobject_set_name(kobj, "%s", new_name); + if (error) + goto out_drop; + + d_add(new_dentry, NULL); + d_move(kobj->dentry, new_dentry); + + sd = kobj->dentry->d_fsdata; + parent_sd = new_parent->d_fsdata; + + list_del_init(&sd->s_sibling); + list_add(&sd->s_sibling, &parent_sd->s_children); + + error = 0; + goto out_unlock; + + out_drop: + d_drop(new_dentry); + out_dput: + dput(new_dentry); + out_unlock: mutex_unlock(&new_parent->d_inode->i_mutex); up_write(&sysfs_rename_sem); - return error; } |