ubifs: Add skeleton for fscrypto
This is the first building block to provide file level
encryption on UBIFS.
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 3c7b29d..6bb5b35 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -181,6 +181,41 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
mnt_drop_write_file(file);
return err;
}
+ case FS_IOC_SET_ENCRYPTION_POLICY: {
+#ifdef CONFIG_UBIFS_FS_ENCRYPTION
+ struct fscrypt_policy policy;
+
+ if (copy_from_user(&policy,
+ (struct fscrypt_policy __user *)arg,
+ sizeof(policy)))
+ return -EFAULT;
+
+ err = fscrypt_process_policy(file, &policy);
+
+ return err;
+#else
+ return -EOPNOTSUPP;
+#endif
+ }
+ case FS_IOC_GET_ENCRYPTION_POLICY: {
+#ifdef CONFIG_UBIFS_FS_ENCRYPTION
+ struct fscrypt_policy policy;
+
+ if (!ubifs_crypt_is_encrypted(inode))
+ return -ENOENT;
+
+ err = fscrypt_get_policy(inode, &policy);
+ if (err)
+ return err;
+
+ if (copy_to_user((void __user *)arg, &policy, sizeof(policy)))
+ return -EFAULT;
+
+ return 0;
+#else
+ return -EOPNOTSUPP;
+#endif
+ }
default:
return -ENOTTY;
