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tape: changer: sg_pt: add SCSI_VOLUME_TAG_LEN const

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so that we do have less 'magic' constants without description

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
This commit is contained in:
Dominik Csapak 2021-07-21 16:04:49 +02:00 committed by Dietmar Maurer
parent 5890143920
commit 62a0e190cb
1 changed files with 3 additions and 2 deletions
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5
src/tape/changer/sg_pt_changer.rs
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@ -33,6 +33,7 @@ use crate::{
};
const SCSI_CHANGER_DEFAULT_TIMEOUT: usize = 60*5; // 5 minutes
const SCSI_VOLUME_TAG_LEN: usize = 36;
/// Initialize element status (Inventory)
pub fn initialize_element_status<F: AsRawFd>(file: &mut F) -> Result<(), Error> {
@ -509,7 +510,7 @@ impl SubHeader {
) -> Result<Option<String>, Error> {
if (self.flags & 128) != 0 { // has PVolTag
let tmp = reader.read_exact_allocated(36)?;
let tmp = reader.read_exact_allocated(SCSI_VOLUME_TAG_LEN)?;
if full {
let volume_tag = scsi_ascii_to_string(&tmp);
return Ok(Some(volume_tag));
@ -526,7 +527,7 @@ impl SubHeader {
) -> Result<Option<String>, Error> {
if (self.flags & 64) != 0 { // has AVolTag
let _tmp = reader.read_exact_allocated(36)?;
let _tmp = reader.read_exact_allocated(SCSI_VOLUME_TAG_LEN)?;
}
Ok(None)