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

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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>
This commit is contained in:
Dominik Csapak 2021-05-31 10:29:31 +02:00 committed by Dietmar Maurer
parent e21a15ab17
commit 84737fb33f
1 changed files with 2 additions and 13 deletions
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15
src/tape/drive/lto/sg_tape/encryption.rs
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@ -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;