return EINVAL instead of ENOTTY to fix ceph support

Signed-off-by: Igor Golikov <igolikov@ibm.com>

diff --git a/metadata/policy.go b/metadata/policy.go
index 148df4ce69251dd327e3e138d7f5384f719f3409..6b6536b3874e97dfe750f842509ec24f5e6675f5 100644 (file)
--- a/metadata/policy.go
+++ b/metadata/policy.go
@@ -128,6 +128,13 @@ func setPolicy(file *os.File, arg unsafe.Pointer) error {
                 log.Printf("FS_IOC_SET_ENCRYPTION_KEY_RESTRICTED");
                 _, _, errno = unix.Syscall(unix.SYS_IOCTL, file.Fd(), uintptr(C.fs_ioc_set_encryption_policy_restricted), uintptr(arg))
         }
+       // there is some code (e.g. CheckSupport) that calls this function with assumption that it will fail
+        // and return EINVAL.
+        // as a temp solution, we will return EINVAL if the restricted policy fails (and returns ENOTTY)
+        if errno == unix.ENOTTY {
+                log.Printf("returning EINVAL instead of ENOTTY")
+                return unix.EINVAL
+        }      
        if errno != 0 {
                return errno
        }