tape: define and use MediumType enum

This commit is contained in:
Dietmar Maurer 2021-04-23 07:54:42 +02:00
parent 33b8d7e5e8
commit a3b4b5b50e
2 changed files with 34 additions and 1 deletions

View File

@ -47,6 +47,7 @@ use crate::{
SenseInfo,
ScsiError,
InquiryInfo,
MediumType,
ModeParameterHeader,
ModeBlockDescriptor,
alloc_page_aligned_buffer,
@ -209,7 +210,7 @@ impl SgTape {
sg_raw.set_timeout(Self::SCSI_TAPE_DEFAULT_TIMEOUT);
let mut cmd = Vec::new();
if head.medium_type >= 0x58 { // FORMAT requires LTO5 or newer)
if MediumType::is_lto5_or_newer(head.medium_type) { // FORMAT requires LTO5 or newer)
cmd.extend(&[0x04, 0, 0, 0, 0, 0]);
sg_raw.do_command(&cmd)?;
if !fast {

View File

@ -219,6 +219,38 @@ pub struct InquiryInfo {
pub revision: String,
}
#[repr(u8)]
pub enum MediumType {
/// Unknown (no media loaded)
Unknown = 0x00,
Ultrium1Data = 0x18,
Ultrium2Data = 0x28,
Ultrium3Data = 0x38,
Ultrium3Worm = 0x3C,
Ultrium4Data = 0x48,
Ultrium4Worm = 0x4C,
Ultrium5Data = 0x58,
Ultrium5Worm = 0x5C,
Ultrium6Data = 0x68,
Ultrium6Worm = 0x6C,
Ultrium7Data = 0x78,
Ultrium7Worm = 0x7C,
Ultrium8Data = 0x88,
Ultrium8Worm = 0x8C,
}
impl MediumType {
pub fn is_lto5_or_newer(medium_type: u8) -> bool {
medium_type >= Self::Ultrium5Data as u8
}
pub fn is_worm(medium_type: u8) -> bool {
(medium_type & 0x0F) == 0x0C
}
}
#[repr(C, packed)]
#[derive(Endian, Debug, Copy, Clone)]
pub struct ModeParameterHeader {