tape: improve EOT error handling
This commit is contained in:
parent
164ad7b706
commit
318b310638
@ -10,7 +10,6 @@ use proxmox::{
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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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section_config::SectionConfigData,
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@ -60,6 +59,7 @@ use crate::{
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Inventory,
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MediaCatalog,
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MediaId,
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BlockReadError,
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lock_media_set,
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lock_media_pool,
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lock_unassigned_media_pool,
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@ -528,17 +528,13 @@ pub fn label_media(
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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 (format it first)"),
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Ok(None) => { /* EOF mark at BOT, assume tape is empty */ },
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Ok(_reader) => bail!("media is not empty (format it first)"),
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Err(BlockReadError::EndOfFile) => { /* EOF mark at BOT, assume tape is empty */ },
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Err(BlockReadError::EndOfStream) => { /* tape is empty */ },
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Err(err) => {
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println!("TEST {:?}", 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 = MediaLabel {
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@ -1091,20 +1087,17 @@ fn barcode_label_media_worker(
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drive.rewind()?;
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match drive.read_next_file() {
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Ok(Some(_file)) => {
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Ok(_reader) => {
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worker.log(format!("media '{}' is not empty (format it first)", label_text));
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continue;
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}
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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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Err(BlockReadError::EndOfFile) => { /* EOF mark at BOT, assume tape is empty */ },
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Err(BlockReadError::EndOfStream) => { /* tape is empty */ },
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Err(_err) => {
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worker.warn(format!("media '{}' read error (maybe not empty - format it first)", label_text));
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continue;
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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 = MediaLabel {
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@ -70,6 +70,7 @@ use crate::{
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tape::{
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TAPE_STATUS_DIR,
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TapeRead,
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BlockReadError,
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MediaId,
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MediaSet,
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MediaCatalog,
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@ -418,12 +419,19 @@ pub fn restore_media(
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loop {
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let current_file_number = drive.current_file_number()?;
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let reader = match drive.read_next_file()? {
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None => {
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let reader = match drive.read_next_file() {
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Err(BlockReadError::EndOfFile) => {
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task_log!(worker, "skip unexpected filemark at pos {}", current_file_number);
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continue;
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}
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Err(BlockReadError::EndOfStream) => {
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task_log!(worker, "detected EOT after {} files", current_file_number);
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break;
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}
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Some(reader) => reader,
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Err(BlockReadError::Error(err)) => {
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return Err(err.into());
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}
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Ok(reader) => reader,
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};
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restore_archive(worker, reader, current_file_number, target, &mut catalog, verbose)?;
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@ -811,12 +819,19 @@ pub fn fast_catalog_restore(
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let current_file_number = drive.current_file_number()?;
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{ // limit reader scope
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let mut reader = match drive.read_next_file()? {
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None => {
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let mut reader = match drive.read_next_file() {
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Err(BlockReadError::EndOfFile) => {
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task_log!(worker, "skip unexpected filemark at pos {}", current_file_number);
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continue;
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}
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Err(BlockReadError::EndOfStream) => {
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task_log!(worker, "detected EOT after {} files", current_file_number);
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break;
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}
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Some(reader) => reader,
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Err(BlockReadError::Error(err)) => {
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return Err(err.into());
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}
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Ok(reader) => reader,
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};
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let header: MediaContentHeader = unsafe { reader.read_le_value()? };
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@ -43,6 +43,7 @@ use proxmox_backup::{
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media_pool::complete_pool_name,
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},
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tape::{
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BlockReadError,
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drive::{
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open_drive,
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lock_tape_device,
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@ -587,12 +588,19 @@ fn debug_scan(mut param: Value) -> Result<(), Error> {
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loop {
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let file_number = drive.current_file_number()?;
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match drive.read_next_file()? {
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None => {
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println!("EOD");
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match drive.read_next_file() {
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Err(BlockReadError::EndOfFile) => {
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println!("filemark number {}", file_number);
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continue;
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},
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Some(mut reader) => {
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}
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Err(BlockReadError::EndOfStream) => {
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println!("got EOT");
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return Ok(());
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}
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Err(BlockReadError::Error(err)) => {
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return Err(err.into());
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}
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Ok(mut reader) => {
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println!("got file number {}", file_number);
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let header: Result<MediaContentHeader, _> = unsafe { reader.read_le_value() };
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@ -43,6 +43,7 @@ use crate::{
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tape::{
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TapeRead,
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TapeWrite,
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BlockReadError,
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drive::{
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TapeDriver,
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},
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@ -320,16 +321,9 @@ impl TapeDriver for LtoTapeHandle {
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self.sg_tape.format_media(fast)
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}
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fn read_next_file<'a>(&'a mut self) -> Result<Option<Box<dyn TapeRead + 'a>>, std::io::Error> {
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fn read_next_file<'a>(&'a mut self) -> Result<Box<dyn TapeRead + 'a>, BlockReadError> {
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let reader = self.sg_tape.open_reader()?;
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let handle = match reader {
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Some(reader) => {
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let reader: Box<dyn TapeRead> = Box::new(reader);
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Some(reader)
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}
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None => None,
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};
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let handle: Box<dyn TapeRead> = Box::new(reader);
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Ok(handle)
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}
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@ -32,7 +32,7 @@ use crate::{
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},
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tape::{
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BlockRead,
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BlockReadStatus,
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BlockReadError,
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BlockWrite,
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file_formats::{
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BlockedWriter,
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@ -526,11 +526,13 @@ impl SgTape {
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}
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}
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fn read_block(&mut self, buffer: &mut [u8]) -> Result<BlockReadStatus, std::io::Error> {
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fn read_block(&mut self, buffer: &mut [u8]) -> Result<usize, BlockReadError> {
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let transfer_len = buffer.len();
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if transfer_len > 0xFFFFFF {
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proxmox::io_bail!("read failed - buffer too large");
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return Err(BlockReadError::Error(
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proxmox::io_format_err!("read failed - buffer too large")
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));
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}
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let mut sg_raw = SgRaw::new(&mut self.file, 0)
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@ -549,21 +551,25 @@ impl SgTape {
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let data = match sg_raw.do_in_command(&cmd, buffer) {
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Ok(data) => data,
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Err(ScsiError::Sense(SenseInfo { sense_key: 0, asc: 0, ascq: 1 })) => {
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return Ok(BlockReadStatus::EndOfFile);
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return Err(BlockReadError::EndOfFile);
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}
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Err(ScsiError::Sense(SenseInfo { sense_key: 8, asc: 0, ascq: 5 })) => {
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return Ok(BlockReadStatus::EndOfStream);
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return Err(BlockReadError::EndOfStream);
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}
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Err(err) => {
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proxmox::io_bail!("read failed - {}", err);
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return Err(BlockReadError::Error(
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proxmox::io_format_err!("read failed - {}", err)
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));
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}
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};
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if data.len() != transfer_len {
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proxmox::io_bail!("read failed - unexpected block len ({} != {})", data.len(), buffer.len())
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return Err(BlockReadError::Error(
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proxmox::io_format_err!("read failed - unexpected block len ({} != {})", data.len(), buffer.len())
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));
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}
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Ok(BlockReadStatus::Ok(transfer_len))
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Ok(transfer_len)
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}
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pub fn open_writer(&mut self) -> BlockedWriter<SgTapeWriter> {
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@ -571,12 +577,9 @@ impl SgTape {
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BlockedWriter::new(writer)
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}
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pub fn open_reader(&mut self) -> Result<Option<BlockedReader<SgTapeReader>>, std::io::Error> {
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pub fn open_reader(&mut self) -> Result<BlockedReader<SgTapeReader>, BlockReadError> {
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let reader = SgTapeReader::new(self);
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match BlockedReader::open(reader)? {
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Some(reader) => Ok(Some(reader)),
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None => Ok(None),
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}
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BlockedReader::open(reader)
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}
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/// Set important drive options
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@ -702,7 +705,7 @@ impl <'a> SgTapeReader<'a> {
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impl <'a> BlockRead for SgTapeReader<'a> {
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fn read_block(&mut self, buffer: &mut [u8]) -> Result<BlockReadStatus, std::io::Error> {
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fn read_block(&mut self, buffer: &mut [u8]) -> Result<usize, BlockReadError> {
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self.sg_tape.read_block(buffer)
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}
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}
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@ -44,6 +44,7 @@ use crate::{
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tape::{
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TapeWrite,
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TapeRead,
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BlockReadError,
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MediaId,
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drive::lto::TapeAlertFlags,
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file_formats::{
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@ -86,7 +87,7 @@ pub trait TapeDriver {
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fn format_media(&mut self, fast: bool) -> Result<(), Error>;
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/// Read/Open the next file
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fn read_next_file<'a>(&'a mut self) -> Result<Option<Box<dyn TapeRead + 'a>>, std::io::Error>;
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fn read_next_file<'a>(&'a mut self) -> Result<Box<dyn TapeRead + 'a>, BlockReadError>;
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/// Write/Append a new file
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fn write_file<'a>(&'a mut self) -> Result<Box<dyn TapeWrite + 'a>, std::io::Error>;
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@ -132,9 +133,17 @@ pub trait TapeDriver {
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self.rewind()?;
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let label = {
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let mut reader = match self.read_next_file()? {
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None => return Ok((None, None)), // tape is empty
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Some(reader) => reader,
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let mut reader = match self.read_next_file() {
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Err(BlockReadError::EndOfStream) => {
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return Ok((None, None)); // tape is empty
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}
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Err(BlockReadError::EndOfFile) => {
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bail!("got unexpected filemark at BOT");
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}
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Err(BlockReadError::Error(err)) => {
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return Err(err.into());
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}
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Ok(reader) => reader,
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};
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let header: MediaContentHeader = unsafe { reader.read_le_value()? };
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@ -155,9 +164,17 @@ pub trait TapeDriver {
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let mut media_id = MediaId { label, media_set_label: None };
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// try to read MediaSet label
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let mut reader = match self.read_next_file()? {
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None => return Ok((Some(media_id), None)),
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Some(reader) => reader,
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let mut reader = match self.read_next_file() {
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Err(BlockReadError::EndOfStream) => {
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return Ok((Some(media_id), None));
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}
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Err(BlockReadError::EndOfFile) => {
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bail!("got unexpected filemark after label");
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}
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Err(BlockReadError::Error(err)) => {
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return Err(err.into());
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}
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Ok(reader) => reader,
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};
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let header: MediaContentHeader = unsafe { reader.read_le_value()? };
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@ -15,6 +15,7 @@ use crate::{
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tape::{
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TapeWrite,
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TapeRead,
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BlockReadError,
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changer::{
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MediaChange,
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MtxStatus,
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@ -261,18 +262,18 @@ impl TapeDriver for VirtualTapeHandle {
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}
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fn read_next_file(&mut self) -> Result<Option<Box<dyn TapeRead>>, io::Error> {
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fn read_next_file(&mut self) -> Result<Box<dyn TapeRead>, BlockReadError> {
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let mut status = self.load_status()
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.map_err(|err| io::Error::new(io::ErrorKind::Other, err.to_string()))?;
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.map_err(|err| BlockReadError::Error(io::Error::new(io::ErrorKind::Other, err.to_string())))?;
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match status.current_tape {
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Some(VirtualTapeStatus { ref name, ref mut pos }) => {
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let index = self.load_tape_index(name)
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.map_err(|err| io::Error::new(io::ErrorKind::Other, err.to_string()))?;
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.map_err(|err| BlockReadError::Error(io::Error::new(io::ErrorKind::Other, err.to_string())))?;
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if *pos >= index.files {
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return Ok(None); // EOM
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return Err(BlockReadError::EndOfStream);
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}
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let path = self.tape_file_path(name, *pos);
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@ -282,16 +283,15 @@ impl TapeDriver for VirtualTapeHandle {
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*pos += 1;
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self.store_status(&status)
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.map_err(|err| io::Error::new(io::ErrorKind::Other, err.to_string()))?;
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.map_err(|err| BlockReadError::Error(io::Error::new(io::ErrorKind::Other, err.to_string())))?;
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let reader = EmulateTapeReader::new(file);
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match BlockedReader::open(reader)? {
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Some(reader) => Ok(Some(Box::new(reader))),
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None => Ok(None),
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let reader = BlockedReader::open(reader)?;
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Ok(Box::new(reader))
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}
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None => {
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return Err(BlockReadError::Error(proxmox::io_format_err!("drive is empty (no tape loaded).")));
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}
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None => proxmox::io_bail!("drive is empty (no tape loaded)."),
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}
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}
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@ -3,7 +3,7 @@ use std::io::Read;
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use crate::tape::{
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TapeRead,
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BlockRead,
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BlockReadStatus,
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BlockReadError,
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file_formats::{
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PROXMOX_TAPE_BLOCK_HEADER_MAGIC_1_0,
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BlockHeader,
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@ -37,15 +37,13 @@ impl <R: BlockRead> BlockedReader<R> {
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/// Create a new BlockedReader instance.
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///
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/// This tries to read the first block, and returns None if we are
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/// at EOT.
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pub fn open(mut reader: R) -> Result<Option<Self>, std::io::Error> {
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/// This tries to read the first block. Please inspect the error
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/// to detect EOF and EOT.
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pub fn open(mut reader: R) -> Result<Self, BlockReadError> {
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let mut buffer = BlockHeader::new();
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if !Self::read_block_frame(&mut buffer, &mut reader)? {
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return Ok(None);
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}
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Self::read_block_frame(&mut buffer, &mut reader)?;
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let (_size, found_end_marker) = Self::check_buffer(&buffer, 0)?;
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@ -58,7 +56,7 @@ impl <R: BlockRead> BlockedReader<R> {
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got_eod = true;
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}
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Ok(Some(Self {
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Ok(Self {
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reader,
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buffer,
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found_end_marker,
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@ -67,7 +65,7 @@ impl <R: BlockRead> BlockedReader<R> {
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seq_nr: 1,
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read_error: false,
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read_pos: 0,
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}))
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})
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}
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fn check_buffer(buffer: &BlockHeader, seq_nr: u32) -> Result<(usize, bool), std::io::Error> {
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@ -95,7 +93,7 @@ impl <R: BlockRead> BlockedReader<R> {
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Ok((size, found_end_marker))
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}
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fn read_block_frame(buffer: &mut BlockHeader, reader: &mut R) -> Result<bool, std::io::Error> {
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fn read_block_frame(buffer: &mut BlockHeader, reader: &mut R) -> Result<(), BlockReadError> {
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let data = unsafe {
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std::slice::from_raw_parts_mut(
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@ -104,38 +102,28 @@ impl <R: BlockRead> BlockedReader<R> {
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)
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};
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match reader.read_block(data) {
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Ok(BlockReadStatus::Ok(bytes)) => {
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let bytes = reader.read_block(data)?;
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if bytes != BlockHeader::SIZE {
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proxmox::io_bail!("got wrong block size");
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}
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Ok(true)
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}
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Ok(BlockReadStatus::EndOfFile) => {
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Ok(false)
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}
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Ok(BlockReadStatus::EndOfStream) => {
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return Err(std::io::Error::from_raw_os_error(nix::errno::Errno::ENOSPC as i32));
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}
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Err(err) => {
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Err(err)
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}
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return Err(proxmox::io_format_err!("got wrong block size").into());
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}
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Ok(())
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}
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fn consume_eof_marker(reader: &mut R) -> Result<(), std::io::Error> {
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let mut tmp_buf = [0u8; 512]; // use a small buffer for testing EOF
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match reader.read_block(&mut tmp_buf) {
|
||||
Ok(BlockReadStatus::Ok(_)) => {
|
||||
Ok(_) => {
|
||||
proxmox::io_bail!("detected tape block after block-stream end marker");
|
||||
}
|
||||
Ok(BlockReadStatus::EndOfFile) => {
|
||||
Err(BlockReadError::EndOfFile) => {
|
||||
return Ok(());
|
||||
}
|
||||
Ok(BlockReadStatus::EndOfStream) => {
|
||||
Err(BlockReadError::EndOfStream) => {
|
||||
proxmox::io_bail!("got unexpected end of tape");
|
||||
}
|
||||
Err(err) => {
|
||||
Err(BlockReadError::Error(err)) => {
|
||||
return Err(err);
|
||||
}
|
||||
}
|
||||
@ -143,7 +131,9 @@ impl <R: BlockRead> BlockedReader<R> {
|
||||
|
||||
fn read_block(&mut self) -> Result<usize, std::io::Error> {
|
||||
|
||||
if !Self::read_block_frame(&mut self.buffer, &mut self.reader)? {
|
||||
match Self::read_block_frame(&mut self.buffer, &mut self.reader) {
|
||||
Ok(()) => { /* ok */ }
|
||||
Err(BlockReadError::EndOfFile) => {
|
||||
self.got_eod = true;
|
||||
self.read_pos = self.buffer.payload.len();
|
||||
if !self.found_end_marker {
|
||||
@ -151,6 +141,13 @@ impl <R: BlockRead> BlockedReader<R> {
|
||||
}
|
||||
return Ok(0); // EOD
|
||||
}
|
||||
Err(BlockReadError::EndOfStream) => {
|
||||
proxmox::io_bail!("got unexpected end of tape");
|
||||
}
|
||||
Err(BlockReadError::Error(err)) => {
|
||||
return Err(err);
|
||||
}
|
||||
}
|
||||
|
||||
let (size, found_end_marker) = Self::check_buffer(&self.buffer, self.seq_nr)?;
|
||||
self.seq_nr += 1;
|
||||
|
@ -4,7 +4,7 @@ use proxmox::tools::io::ReadExt;
|
||||
|
||||
use crate::tape::{
|
||||
BlockRead,
|
||||
BlockReadStatus,
|
||||
BlockReadError,
|
||||
file_formats::PROXMOX_TAPE_BLOCK_SIZE,
|
||||
};
|
||||
|
||||
@ -24,22 +24,27 @@ impl <R: Read> EmulateTapeReader<R> {
|
||||
}
|
||||
|
||||
impl <R: Read> BlockRead for EmulateTapeReader<R> {
|
||||
fn read_block(&mut self, buffer: &mut [u8]) -> Result<BlockReadStatus, std::io::Error> {
|
||||
fn read_block(&mut self, buffer: &mut [u8]) -> Result<usize, BlockReadError> {
|
||||
if self.got_eof {
|
||||
proxmox::io_bail!("detected read after EOF!");
|
||||
return Err(BlockReadError::Error(proxmox::io_format_err!("detected read after EOF!")));
|
||||
}
|
||||
match self.reader.read_exact_or_eof(buffer)? {
|
||||
false => {
|
||||
self.got_eof = true;
|
||||
Ok(BlockReadStatus::EndOfFile)
|
||||
Err(BlockReadError::EndOfFile)
|
||||
}
|
||||
true => {
|
||||
// test buffer len after EOF test (to allow EOF test with small buffers in BufferedReader)
|
||||
if buffer.len() != PROXMOX_TAPE_BLOCK_SIZE {
|
||||
proxmox::io_bail!("EmulateTapeReader: read_block with wrong block size ({} != {})",
|
||||
buffer.len(), PROXMOX_TAPE_BLOCK_SIZE);
|
||||
return Err(BlockReadError::Error(
|
||||
proxmox::io_format_err!(
|
||||
"EmulateTapeReader: read_block with wrong block size ({} != {})",
|
||||
buffer.len(),
|
||||
PROXMOX_TAPE_BLOCK_SIZE,
|
||||
)
|
||||
));
|
||||
}
|
||||
Ok(BlockReadStatus::Ok(buffer.len()))
|
||||
Ok(buffer.len())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -15,14 +15,18 @@ pub trait TapeRead: Read {
|
||||
fn has_end_marker(&self) -> Result<bool, std::io::Error>;
|
||||
}
|
||||
|
||||
pub enum BlockReadStatus {
|
||||
Ok(usize),
|
||||
#[derive(thiserror::Error, Debug)]
|
||||
pub enum BlockReadError {
|
||||
#[error("{0}")]
|
||||
Error(#[from] std::io::Error),
|
||||
#[error("end of file")]
|
||||
EndOfFile,
|
||||
#[error("end of data stream")]
|
||||
EndOfStream,
|
||||
}
|
||||
|
||||
/// Read streams of blocks
|
||||
pub trait BlockRead {
|
||||
/// Read the next block (whole buffer)
|
||||
fn read_block(&mut self, buffer: &mut [u8]) -> Result<BlockReadStatus, std::io::Error>;
|
||||
fn read_block(&mut self, buffer: &mut [u8]) -> Result<usize, BlockReadError>;
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user