tape: implement label command
This commit is contained in:
parent
c4d8542ec1
commit
7bb720cb4d
@ -1,25 +1,45 @@
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use std::path::Path;
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use anyhow::{bail, Error};
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use anyhow::{bail, Error};
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use serde_json::Value;
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use serde_json::Value;
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use proxmox::api::{api, Router, SubdirMap};
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use proxmox::{
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use proxmox::{sortable, identity, list_subdirs_api_method};
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sortable,
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identity,
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list_subdirs_api_method,
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tools::Uuid,
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sys::error::SysError,
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api::{
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api,
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Router,
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SubdirMap,
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},
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};
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use crate::{
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use crate::{
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config,
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config,
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api2::types::{
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api2::types::{
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DRIVE_ID_SCHEMA,
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DRIVE_ID_SCHEMA,
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MEDIA_LABEL_SCHEMA,
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MEDIA_LABEL_SCHEMA,
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MEDIA_POOL_NAME_SCHEMA,
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LinuxTapeDrive,
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LinuxTapeDrive,
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ScsiTapeChanger,
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ScsiTapeChanger,
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TapeDeviceInfo,
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TapeDeviceInfo,
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},
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},
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tape::{
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tape::{
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TAPE_STATUS_DIR,
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TapeDriver,
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MediaChange,
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MediaChange,
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Inventory,
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MediaId,
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mtx_load,
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mtx_load,
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mtx_unload,
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mtx_unload,
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linux_tape_device_list,
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linux_tape_device_list,
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open_drive,
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open_drive,
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media_changer,
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media_changer,
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file_formats::{
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DriveLabel,
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MediaSetLabel,
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},
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},
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},
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};
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};
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@ -216,6 +236,128 @@ pub fn eject_media(drive: String) -> Result<(), Error> {
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Ok(())
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Ok(())
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}
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}
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#[api(
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input: {
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properties: {
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drive: {
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schema: DRIVE_ID_SCHEMA,
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},
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"changer-id": {
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schema: MEDIA_LABEL_SCHEMA,
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},
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pool: {
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schema: MEDIA_POOL_NAME_SCHEMA,
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optional: true,
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},
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},
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},
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)]
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/// Label media
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///
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/// Write a new media label to the media in 'drive'. The media is
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/// assigned to the specified 'pool', or else to the free media pool.
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///
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/// Note: The media need to be empty (you may want to erase it first).
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pub fn label_media(
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drive: String,
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pool: Option<String>,
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changer_id: String,
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) -> Result<(), Error> {
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if let Some(ref pool) = pool {
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let (pool_config, _digest) = config::media_pool::config()?;
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if pool_config.sections.get(pool).is_none() {
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bail!("no such pool ('{}')", pool);
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}
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}
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let (config, _digest) = config::drive::config()?;
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let mut drive = open_drive(&config, &drive)?;
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drive.rewind()?;
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match drive.read_next_file() {
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Ok(Some(_file)) => bail!("media is not empty (erase first)"),
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Ok(None) => { /* EOF mark at BOT, assume tape is empty */ },
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Err(err) => {
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if err.is_errno(nix::errno::Errno::ENOSPC) || err.is_errno(nix::errno::Errno::EIO) {
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/* assume tape is empty */
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} else {
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bail!("media read error - {}", err);
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}
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}
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}
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let ctime = proxmox::tools::time::epoch_i64();
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let label = DriveLabel {
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changer_id: changer_id.to_string(),
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uuid: Uuid::generate(),
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ctime,
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};
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write_media_label(&mut drive, label, pool)
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}
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fn write_media_label(
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drive: &mut Box<dyn TapeDriver>,
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label: DriveLabel,
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pool: Option<String>,
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) -> Result<(), Error> {
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drive.label_tape(&label)?;
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let mut media_set_label = None;
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if let Some(ref pool) = pool {
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// assign media to pool by writing special media set label
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println!("Label media '{}' for pool '{}'", label.changer_id, pool);
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let set = MediaSetLabel::with_data(&pool, [0u8; 16].into(), 0, label.ctime);
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drive.write_media_set_label(&set)?;
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media_set_label = Some(set);
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} else {
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println!("Label media '{}' (no pool assignment)", label.changer_id);
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}
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let media_id = MediaId { label, media_set_label };
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let mut inventory = Inventory::load(Path::new(TAPE_STATUS_DIR))?;
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inventory.store(media_id.clone())?;
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drive.rewind()?;
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match drive.read_label() {
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Ok(Some(info)) => {
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if info.label.uuid != media_id.label.uuid {
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bail!("verify label failed - got wrong label uuid");
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}
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if let Some(ref pool) = pool {
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match info.media_set_label {
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Some((set, _)) => {
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if set.uuid != [0u8; 16].into() {
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bail!("verify media set label failed - got wrong set uuid");
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}
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if &set.pool != pool {
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bail!("verify media set label failed - got wrong pool");
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}
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}
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None => {
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bail!("verify media set label failed (missing set label)");
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}
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}
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}
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},
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Ok(None) => bail!("verify label failed (got empty media)"),
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Err(err) => bail!("verify label failed - {}", err),
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};
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drive.rewind()?;
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Ok(())
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}
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#[sortable]
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#[sortable]
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pub const SUBDIRS: SubdirMap = &sorted!([
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pub const SUBDIRS: SubdirMap = &sorted!([
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(
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(
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@ -228,6 +370,11 @@ pub const SUBDIRS: SubdirMap = &sorted!([
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&Router::new()
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&Router::new()
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.put(&API_METHOD_ERASE_MEDIA)
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.put(&API_METHOD_ERASE_MEDIA)
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),
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),
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(
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"label-media",
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&Router::new()
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.put(&API_METHOD_LABEL_MEDIA)
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),
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(
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(
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"load-slot",
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"load-slot",
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&Router::new()
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&Router::new()
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@ -17,11 +17,13 @@ use proxmox_backup::{
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types::{
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types::{
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DRIVE_ID_SCHEMA,
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DRIVE_ID_SCHEMA,
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MEDIA_LABEL_SCHEMA,
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MEDIA_LABEL_SCHEMA,
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MEDIA_POOL_NAME_SCHEMA,
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},
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},
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},
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},
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config::{
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config::{
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self,
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self,
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drive::complete_drive_name,
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drive::complete_drive_name,
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media_pool::complete_pool_name,
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},
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},
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tape::{
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tape::{
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complete_media_changer_id,
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complete_media_changer_id,
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@ -190,6 +192,43 @@ fn load_media(
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Ok(())
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Ok(())
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}
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}
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#[api(
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input: {
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properties: {
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pool: {
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schema: MEDIA_POOL_NAME_SCHEMA,
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optional: true,
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},
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drive: {
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schema: DRIVE_ID_SCHEMA,
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optional: true,
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},
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"changer-id": {
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schema: MEDIA_LABEL_SCHEMA,
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},
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},
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},
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)]
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/// Label media
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fn label_media(
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mut param: Value,
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rpcenv: &mut dyn RpcEnvironment,
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) -> Result<(), Error> {
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let (config, _digest) = config::drive::config()?;
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param["drive"] = lookup_drive_name(¶m, &config)?.into();
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let info = &api2::tape::drive::API_METHOD_LABEL_MEDIA;
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match info.handler {
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ApiHandler::Sync(handler) => (handler)(param, info, rpcenv)?,
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_ => unreachable!(),
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};
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Ok(())
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}
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fn main() {
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fn main() {
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let cmd_def = CliCommandMap::new()
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let cmd_def = CliCommandMap::new()
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@ -208,6 +247,13 @@ fn main() {
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CliCommand::new(&API_METHOD_EJECT_MEDIA)
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CliCommand::new(&API_METHOD_EJECT_MEDIA)
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.completion_cb("drive", complete_drive_name)
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.completion_cb("drive", complete_drive_name)
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)
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)
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.insert(
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"label",
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CliCommand::new(&API_METHOD_LABEL_MEDIA)
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.completion_cb("drive", complete_drive_name)
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.completion_cb("pool", complete_pool_name)
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)
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.insert("changer", changer_commands())
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.insert("changer", changer_commands())
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.insert("drive", drive_commands())
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.insert("drive", drive_commands())
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.insert("pool", pool_commands())
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.insert("pool", pool_commands())
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@ -3,7 +3,7 @@
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//! A set of backup medias.
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//! A set of backup medias.
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//!
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//!
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//! This struct manages backup media state during backup. The main
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//! This struct manages backup media state during backup. The main
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//! purpose ist to allocate media sets and assing new tapes to it.
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//! purpose is to allocate media sets and assing new tapes to it.
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//!
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//!
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//!
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//!
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