lto/sg_tape/encryption: remove non lto-4 supported byte

from the SspDataEncryptionCapabilityPage

it seems we do not need it, since the EXTDECC flag is only used for
determining if the drive is capable to be configured via
ADI (Automation/Drive Interface) which we do not use at all.

this makes the call work with LTO-4 again

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

diff --git a/src/tape/drive/lto/sg_tape/encryption.rs b/src/tape/drive/lto/sg_tape/encryption.rs
index 7b687f2c35a789100fdc7dda76f18b9476472c8b..5ce571e4e754b9f08f662e6ecb85894cb8ddf405 100644 (file)
--- a/src/tape/drive/lto/sg_tape/encryption.rs
+++ b/src/tape/drive/lto/sg_tape/encryption.rs
@@ -195,8 +195,7 @@ struct DataEncryptionStatus {
 struct SspDataEncryptionCapabilityPage {
     page_code: u16,
     page_len: u16,
-    extdecc_cfgp_byte: u8,
-    reserved: [u8; 15],
+    reserved: [u8; 16],
 }
 
 #[derive(Endian)]
@@ -222,17 +221,7 @@ fn decode_spin_data_encryption_caps(data: &[u8]) -> Result<u8, Error> {
 
     proxmox::try_block!({
         let mut reader = &data[..];
-        let page: SspDataEncryptionCapabilityPage = unsafe { reader.read_be_value()? };
-
-        let extdecc = (page.extdecc_cfgp_byte & 0b00001100) >> 2;
-        if extdecc != 2 {
-            bail!("not external data encryption control capable");
-        }
-
-        let cfg_p = page.extdecc_cfgp_byte & 0b00000011;
-        if cfg_p != 1 {
-            bail!("not allow to change logical block encryption parameters");
-        }
+        let _page: SspDataEncryptionCapabilityPage = unsafe { reader.read_be_value()? };
 
         let mut aes_cgm_index = None;