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tape: implement LTO userspace driver

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This commit is contained in:
Dietmar Maurer
2021-03-30 17:07:59 +02:00
parent 1336ae8249
commit a79082a0dd
17 changed files with 1078 additions and 531 deletions
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51
src/tape/linux_list_drives.rs
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@ -12,14 +12,14 @@ use crate::{
tools::fs::scan_subdir,
};
lazy_static::lazy_static!{
static ref SCSI_GENERIC_NAME_REGEX: regex::Regex =
regex::Regex::new(r"^sg\d+$").unwrap();
}
/// List linux tape changer devices
pub fn linux_tape_changer_list() -> Vec<TapeDeviceInfo> {
lazy_static::lazy_static!{
static ref SCSI_GENERIC_NAME_REGEX: regex::Regex =
regex::Regex::new(r"^sg\d+$").unwrap();
}
let mut list = Vec::new();
let dir_iter = match scan_subdir(
@ -111,20 +111,15 @@ pub fn linux_tape_changer_list() -> Vec<TapeDeviceInfo> {
list
}
/// List linux tape devices (non-rewinding)
pub fn linux_tape_device_list() -> Vec<TapeDeviceInfo> {
lazy_static::lazy_static!{
static ref NST_TAPE_NAME_REGEX: regex::Regex =
regex::Regex::new(r"^nst\d+$").unwrap();
}
/// List LTO drives
pub fn lto_tape_device_list() -> Vec<TapeDeviceInfo> {
let mut list = Vec::new();
let dir_iter = match scan_subdir(
libc::AT_FDCWD,
"/sys/class/scsi_tape",
&NST_TAPE_NAME_REGEX)
"/sys/class/scsi_generic",
&SCSI_GENERIC_NAME_REGEX)
{
Err(_) => return list,
Ok(iter) => iter,
@ -138,7 +133,7 @@ pub fn linux_tape_device_list() -> Vec<TapeDeviceInfo> {
let name = item.file_name().to_str().unwrap().to_string();
let mut sys_path = PathBuf::from("/sys/class/scsi_tape");
let mut sys_path = PathBuf::from("/sys/class/scsi_generic");
sys_path.push(&name);
let device = match udev::Device::from_syspath(&sys_path) {
@ -151,6 +146,24 @@ pub fn linux_tape_device_list() -> Vec<TapeDeviceInfo> {
Some(devnum) => devnum,
};
let parent = match device.parent() {
None => continue,
Some(parent) => parent,
};
match parent.attribute_value("type") {
Some(type_osstr) => {
if type_osstr != "1" {
continue;
}
}
_ => { continue; }
}
// let mut test_path = sys_path.clone();
// test_path.push("device/scsi_tape");
// if !test_path.exists() { continue; }
let _dev_path = match device.devnode().map(Path::to_owned) {
None => continue,
Some(dev_path) => dev_path,
@ -174,7 +187,7 @@ pub fn linux_tape_device_list() -> Vec<TapeDeviceInfo> {
.and_then(|s| if let Ok(s) = s.into_string() { Some(s) } else { None })
.unwrap_or_else(|| String::from("unknown"));
let dev_path = format!("/dev/tape/by-id/scsi-{}-nst", serial);
let dev_path = format!("/dev/tape/by-id/scsi-{}-sg", serial);
if PathBuf::from(&dev_path).exists() {
list.push(TapeDeviceInfo {
@ -230,13 +243,13 @@ pub fn lookup_device_identification<'a>(
}
}
/// Make sure path is a linux tape device
/// Make sure path is a lto tape device
pub fn check_drive_path(
drives: &[TapeDeviceInfo],
path: &str,
) -> Result<(), Error> {
if lookup_device(drives, path).is_none() {
bail!("path '{}' is not a linux (non-rewinding) tape device", path);
bail!("path '{}' is not a lto SCSI-generic tape device", path);
}
Ok(())
}
@ -250,5 +263,5 @@ pub fn complete_changer_path(_arg: &str, _param: &HashMap<String, String>) -> Ve
/// List tape device paths
pub fn complete_drive_path(_arg: &str, _param: &HashMap<String, String>) -> Vec<String> {
linux_tape_device_list().iter().map(|v| v.path.clone()).collect()
lto_tape_device_list().iter().map(|v| v.path.clone()).collect()
}