a4c1143664
a range from high to low in rust results in an empty range (see std::ops::Range documentation) so we need to generate the range from 0..data.len() and then reverse it also, the task log contains a newline at the end, so we have to remove that (should it exist) Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
682 lines
21 KiB
Rust
682 lines
21 KiB
Rust
use std::collections::HashMap;
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use std::fs::File;
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use std::io::{Read, BufRead, BufReader};
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use std::panic::UnwindSafe;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::sync::{Arc, Mutex};
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use chrono::Local;
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use anyhow::{bail, format_err, Error};
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use futures::*;
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use lazy_static::lazy_static;
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use nix::unistd::Pid;
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use serde_json::{json, Value};
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use serde::{Serialize, Deserialize};
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use tokio::sync::oneshot;
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use proxmox::sys::linux::procfs;
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use proxmox::try_block;
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use proxmox::tools::fs::{create_path, open_file_locked, replace_file, CreateOptions};
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use super::UPID;
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use crate::tools::FileLogger;
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use crate::api2::types::Userid;
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macro_rules! PROXMOX_BACKUP_VAR_RUN_DIR_M { () => ("/run/proxmox-backup") }
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macro_rules! PROXMOX_BACKUP_LOG_DIR_M { () => ("/var/log/proxmox-backup") }
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macro_rules! PROXMOX_BACKUP_TASK_DIR_M { () => (concat!( PROXMOX_BACKUP_LOG_DIR_M!(), "/tasks")) }
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pub const PROXMOX_BACKUP_VAR_RUN_DIR: &str = PROXMOX_BACKUP_VAR_RUN_DIR_M!();
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pub const PROXMOX_BACKUP_LOG_DIR: &str = PROXMOX_BACKUP_LOG_DIR_M!();
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pub const PROXMOX_BACKUP_TASK_DIR: &str = PROXMOX_BACKUP_TASK_DIR_M!();
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pub const PROXMOX_BACKUP_TASK_LOCK_FN: &str = concat!(PROXMOX_BACKUP_TASK_DIR_M!(), "/.active.lock");
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pub const PROXMOX_BACKUP_ACTIVE_TASK_FN: &str = concat!(PROXMOX_BACKUP_TASK_DIR_M!(), "/active");
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lazy_static! {
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static ref WORKER_TASK_LIST: Mutex<HashMap<usize, Arc<WorkerTask>>> = Mutex::new(HashMap::new());
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static ref MY_PID: i32 = unsafe { libc::getpid() };
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static ref MY_PID_PSTART: u64 = procfs::PidStat::read_from_pid(Pid::from_raw(*MY_PID))
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.unwrap()
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.starttime;
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}
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/// Test if the task is still running
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pub async fn worker_is_active(upid: &UPID) -> Result<bool, Error> {
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if (upid.pid == *MY_PID) && (upid.pstart == *MY_PID_PSTART) {
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return Ok(WORKER_TASK_LIST.lock().unwrap().contains_key(&upid.task_id));
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}
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if !procfs::check_process_running_pstart(upid.pid, upid.pstart).is_some() {
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return Ok(false);
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}
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let socketname = format!(
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"\0{}/proxmox-task-control-{}.sock", PROXMOX_BACKUP_VAR_RUN_DIR, upid.pid);
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let cmd = json!({
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"command": "status",
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"upid": upid.to_string(),
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});
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let status = super::send_command(socketname, cmd).await?;
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if let Some(active) = status.as_bool() {
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Ok(active)
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} else {
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bail!("got unexpected result {:?} (expected bool)", status);
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}
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}
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/// Test if the task is still running (fast but inaccurate implementation)
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///
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/// If the task is spanned from a different process, we simply return if
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/// that process is still running. This information is good enough to detect
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/// stale tasks...
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pub fn worker_is_active_local(upid: &UPID) -> bool {
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if (upid.pid == *MY_PID) && (upid.pstart == *MY_PID_PSTART) {
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WORKER_TASK_LIST.lock().unwrap().contains_key(&upid.task_id)
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} else {
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procfs::check_process_running_pstart(upid.pid, upid.pstart).is_some()
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}
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}
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pub fn create_task_control_socket() -> Result<(), Error> {
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let socketname = format!(
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"\0{}/proxmox-task-control-{}.sock", PROXMOX_BACKUP_VAR_RUN_DIR, *MY_PID);
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let control_future = super::create_control_socket(socketname, |param| {
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let param = param.as_object()
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.ok_or_else(|| format_err!("unable to parse parameters (expected json object)"))?;
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if param.keys().count() != 2 { bail!("wrong number of parameters"); }
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let command = param["command"].as_str()
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.ok_or_else(|| format_err!("unable to parse parameters (missing command)"))?;
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// we have only two commands for now
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if !(command == "abort-task" || command == "status") { bail!("got unknown command '{}'", command); }
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let upid_str = param["upid"].as_str()
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.ok_or_else(|| format_err!("unable to parse parameters (missing upid)"))?;
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let upid = upid_str.parse::<UPID>()?;
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if !((upid.pid == *MY_PID) && (upid.pstart == *MY_PID_PSTART)) {
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bail!("upid does not belong to this process");
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}
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let hash = WORKER_TASK_LIST.lock().unwrap();
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match command {
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"abort-task" => {
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if let Some(ref worker) = hash.get(&upid.task_id) {
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worker.request_abort();
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} else {
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// assume task is already stopped
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}
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Ok(Value::Null)
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}
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"status" => {
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let active = hash.contains_key(&upid.task_id);
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Ok(active.into())
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}
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_ => {
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bail!("got unknown command '{}'", command);
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}
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}
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})?;
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tokio::spawn(control_future);
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Ok(())
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}
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pub fn abort_worker_async(upid: UPID) {
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tokio::spawn(async move {
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if let Err(err) = abort_worker(upid).await {
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eprintln!("abort worker failed - {}", err);
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}
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});
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}
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pub async fn abort_worker(upid: UPID) -> Result<(), Error> {
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let target_pid = upid.pid;
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let socketname = format!(
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"\0{}/proxmox-task-control-{}.sock", PROXMOX_BACKUP_VAR_RUN_DIR, target_pid);
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let cmd = json!({
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"command": "abort-task",
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"upid": upid.to_string(),
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});
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super::send_command(socketname, cmd).map_ok(|_| ()).await
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}
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fn parse_worker_status_line(line: &str) -> Result<(String, UPID, Option<TaskState>), Error> {
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let data = line.splitn(3, ' ').collect::<Vec<&str>>();
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let len = data.len();
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match len {
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1 => Ok((data[0].to_owned(), data[0].parse::<UPID>()?, None)),
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3 => {
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let endtime = i64::from_str_radix(data[1], 16)?;
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let state = TaskState::from_endtime_and_message(endtime, data[2])?;
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Ok((data[0].to_owned(), data[0].parse::<UPID>()?, Some(state)))
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}
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_ => bail!("wrong number of components"),
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}
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}
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/// Create task log directory with correct permissions
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pub fn create_task_log_dirs() -> Result<(), Error> {
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try_block!({
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let backup_user = crate::backup::backup_user()?;
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let opts = CreateOptions::new()
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.owner(backup_user.uid)
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.group(backup_user.gid);
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create_path(PROXMOX_BACKUP_LOG_DIR, None, Some(opts.clone()))?;
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create_path(PROXMOX_BACKUP_TASK_DIR, None, Some(opts.clone()))?;
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create_path(PROXMOX_BACKUP_VAR_RUN_DIR, None, Some(opts))?;
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Ok(())
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}).map_err(|err: Error| format_err!("unable to create task log dir - {}", err))?;
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Ok(())
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}
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/// Read endtime (time of last log line) and exitstatus from task log file
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/// If there is not a single line with at valid datetime, we assume the
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/// starttime to be the endtime
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pub fn upid_read_status(upid: &UPID) -> Result<TaskState, Error> {
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let mut status = TaskState::Unknown { endtime: upid.starttime };
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let path = upid.log_path();
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let mut file = File::open(path)?;
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/// speedup - only read tail
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use std::io::Seek;
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use std::io::SeekFrom;
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let _ = file.seek(SeekFrom::End(-8192)); // ignore errors
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let mut data = Vec::with_capacity(8192);
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file.read_to_end(&mut data)?;
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// task logs should end with newline, we do not want it here
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if data[data.len()-1] == b'\n' {
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data.pop();
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}
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let last_line = {
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let mut start = 0;
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for pos in (0..data.len()).rev() {
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if data[pos] == b'\n' {
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start = pos + 1;
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break;
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}
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}
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&data[start..]
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};
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let last_line = std::str::from_utf8(last_line)
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.map_err(|err| format_err!("upid_read_status: utf8 parse failed: {}", err))?;
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let mut iter = last_line.splitn(2, ": ");
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if let Some(time_str) = iter.next() {
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if let Ok(endtime) = chrono::DateTime::parse_from_rfc3339(time_str) {
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let endtime = endtime.timestamp();
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if let Some(rest) = iter.next().and_then(|rest| rest.strip_prefix("TASK ")) {
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if let Ok(state) = TaskState::from_endtime_and_message(endtime, rest) {
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status = state;
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}
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}
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}
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}
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Ok(status)
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}
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/// Task State
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#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
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pub enum TaskState {
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/// The Task ended with an undefined state
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Unknown { endtime: i64 },
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/// The Task ended and there were no errors or warnings
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OK { endtime: i64 },
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/// The Task had 'count' amount of warnings and no errors
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Warning { count: u64, endtime: i64 },
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/// The Task ended with the error described in 'message'
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Error { message: String, endtime: i64 },
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}
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impl TaskState {
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pub fn endtime(&self) -> i64 {
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match *self {
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TaskState::Unknown { endtime } => endtime,
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TaskState::OK { endtime } => endtime,
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TaskState::Warning { endtime, .. } => endtime,
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TaskState::Error { endtime, .. } => endtime,
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}
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}
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fn result_text(&self) -> String {
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match self {
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TaskState::Error { message, .. } => format!("TASK ERROR: {}", message),
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other => format!("TASK {}", other),
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}
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}
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fn from_endtime_and_message(endtime: i64, s: &str) -> Result<Self, Error> {
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if s == "unknown" {
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Ok(TaskState::Unknown { endtime })
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} else if s == "OK" {
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Ok(TaskState::OK { endtime })
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} else if s.starts_with("WARNINGS: ") {
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let count: u64 = s[10..].parse()?;
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Ok(TaskState::Warning{ count, endtime })
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} else if s.len() > 0 {
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let message = if s.starts_with("ERROR: ") { &s[7..] } else { s }.to_string();
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Ok(TaskState::Error{ message, endtime })
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} else {
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bail!("unable to parse Task Status '{}'", s);
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}
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}
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}
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impl std::cmp::PartialOrd for TaskState {
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fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
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Some(self.endtime().cmp(&other.endtime()))
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}
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}
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impl std::cmp::Ord for TaskState {
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fn cmp(&self, other: &Self) -> std::cmp::Ordering {
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self.endtime().cmp(&other.endtime())
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}
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}
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impl std::fmt::Display for TaskState {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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TaskState::Unknown { .. } => write!(f, "unknown"),
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TaskState::OK { .. }=> write!(f, "OK"),
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TaskState::Warning { count, .. } => write!(f, "WARNINGS: {}", count),
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TaskState::Error { message, .. } => write!(f, "{}", message),
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}
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}
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}
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/// Task details including parsed UPID
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///
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/// If there is no `state`, the task is still running.
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#[derive(Debug)]
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pub struct TaskListInfo {
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/// The parsed UPID
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pub upid: UPID,
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/// UPID string representation
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pub upid_str: String,
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/// Task `(endtime, status)` if already finished
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pub state: Option<TaskState>, // endtime, status
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}
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// atomically read/update the task list, update status of finished tasks
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// new_upid is added to the list when specified.
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// Returns a sorted list of known tasks,
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fn update_active_workers(new_upid: Option<&UPID>) -> Result<Vec<TaskListInfo>, Error> {
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let backup_user = crate::backup::backup_user()?;
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let lock = open_file_locked(PROXMOX_BACKUP_TASK_LOCK_FN, std::time::Duration::new(10, 0))?;
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nix::unistd::chown(PROXMOX_BACKUP_TASK_LOCK_FN, Some(backup_user.uid), Some(backup_user.gid))?;
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let reader = match File::open(PROXMOX_BACKUP_ACTIVE_TASK_FN) {
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Ok(f) => Some(BufReader::new(f)),
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Err(err) => {
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if err.kind() == std::io::ErrorKind::NotFound {
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None
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} else {
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bail!("unable to open active worker {:?} - {}", PROXMOX_BACKUP_ACTIVE_TASK_FN, err);
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}
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}
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};
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let mut active_list = vec![];
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let mut finish_list = vec![];
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if let Some(lines) = reader.map(|r| r.lines()) {
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for line in lines {
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let line = line?;
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match parse_worker_status_line(&line) {
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Err(err) => bail!("unable to parse active worker status '{}' - {}", line, err),
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Ok((upid_str, upid, state)) => match state {
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None if worker_is_active_local(&upid) => {
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active_list.push(TaskListInfo { upid, upid_str, state: None });
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},
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None => {
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println!("Detected stopped UPID {}", upid_str);
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let status = upid_read_status(&upid)
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.unwrap_or_else(|_| TaskState::Unknown { endtime: Local::now().timestamp() });
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finish_list.push(TaskListInfo {
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upid, upid_str, state: Some(status)
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});
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},
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Some(status) => {
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finish_list.push(TaskListInfo {
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upid, upid_str, state: Some(status)
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})
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}
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}
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}
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}
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}
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if let Some(upid) = new_upid {
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active_list.push(TaskListInfo { upid: upid.clone(), upid_str: upid.to_string(), state: None });
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}
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// assemble list without duplicates
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// we include all active tasks,
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// and fill up to 1000 entries with finished tasks
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let max = 1000;
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let mut task_hash = HashMap::new();
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for info in active_list {
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task_hash.insert(info.upid_str.clone(), info);
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}
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for info in finish_list {
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if task_hash.len() > max { break; }
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if !task_hash.contains_key(&info.upid_str) {
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task_hash.insert(info.upid_str.clone(), info);
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}
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}
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let mut task_list: Vec<TaskListInfo> = vec![];
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for (_, info) in task_hash { task_list.push(info); }
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task_list.sort_unstable_by(|b, a| { // lastest on top
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match (&a.state, &b.state) {
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(Some(s1), Some(s2)) => s1.cmp(&s2),
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(Some(_), None) => std::cmp::Ordering::Less,
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(None, Some(_)) => std::cmp::Ordering::Greater,
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_ => a.upid.starttime.cmp(&b.upid.starttime),
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}
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});
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let mut raw = String::new();
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for info in &task_list {
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if let Some(status) = &info.state {
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raw.push_str(&format!("{} {:08X} {}\n", info.upid_str, status.endtime(), status));
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} else {
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raw.push_str(&info.upid_str);
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raw.push('\n');
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}
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}
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replace_file(
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PROXMOX_BACKUP_ACTIVE_TASK_FN,
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raw.as_bytes(),
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CreateOptions::new()
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.owner(backup_user.uid)
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.group(backup_user.gid),
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)?;
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drop(lock);
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Ok(task_list)
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}
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|
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/// Returns a sorted list of known tasks
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///
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/// The list is sorted by `(starttime, endtime)` in ascending order
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pub fn read_task_list() -> Result<Vec<TaskListInfo>, Error> {
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update_active_workers(None)
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}
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/// Launch long running worker tasks.
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///
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/// A worker task can either be a whole thread, or a simply tokio
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/// task/future. Each task can `log()` messages, which are stored
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/// persistently to files. Task should poll the `abort_requested`
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/// flag, and stop execution when requested.
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#[derive(Debug)]
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pub struct WorkerTask {
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upid: UPID,
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data: Mutex<WorkerTaskData>,
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abort_requested: AtomicBool,
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}
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impl std::fmt::Display for WorkerTask {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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self.upid.fmt(f)
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}
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}
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#[derive(Debug)]
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struct WorkerTaskData {
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logger: FileLogger,
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progress: f64, // 0..1
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warn_count: u64,
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pub abort_listeners: Vec<oneshot::Sender<()>>,
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}
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impl Drop for WorkerTask {
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fn drop(&mut self) {
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println!("unregister worker");
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}
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}
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|
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impl WorkerTask {
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pub fn new(worker_type: &str, worker_id: Option<String>, userid: Userid, to_stdout: bool) -> Result<Arc<Self>, Error> {
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println!("register worker");
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|
|
|
let upid = UPID::new(worker_type, worker_id, userid)?;
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|
let task_id = upid.task_id;
|
|
|
|
let mut path = std::path::PathBuf::from(PROXMOX_BACKUP_TASK_DIR);
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|
|
|
path.push(format!("{:02X}", upid.pstart % 256));
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|
|
|
let backup_user = crate::backup::backup_user()?;
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|
|
|
create_path(&path, None, Some(CreateOptions::new().owner(backup_user.uid).group(backup_user.gid)))?;
|
|
|
|
path.push(upid.to_string());
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|
|
|
println!("FILE: {:?}", path);
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|
|
|
let logger = FileLogger::new(&path, to_stdout)?;
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|
nix::unistd::chown(&path, Some(backup_user.uid), Some(backup_user.gid))?;
|
|
|
|
let worker = Arc::new(Self {
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|
upid: upid.clone(),
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|
abort_requested: AtomicBool::new(false),
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|
data: Mutex::new(WorkerTaskData {
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|
logger,
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|
progress: 0.0,
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|
warn_count: 0,
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|
abort_listeners: vec![],
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|
}),
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|
});
|
|
|
|
// scope to drop the lock again after inserting
|
|
{
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|
let mut hash = WORKER_TASK_LIST.lock().unwrap();
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|
hash.insert(task_id, worker.clone());
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|
super::set_worker_count(hash.len());
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|
}
|
|
|
|
update_active_workers(Some(&upid))?;
|
|
|
|
Ok(worker)
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|
}
|
|
|
|
/// Spawn a new tokio task/future.
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|
pub fn spawn<F, T>(
|
|
worker_type: &str,
|
|
worker_id: Option<String>,
|
|
userid: Userid,
|
|
to_stdout: bool,
|
|
f: F,
|
|
) -> Result<String, Error>
|
|
where F: Send + 'static + FnOnce(Arc<WorkerTask>) -> T,
|
|
T: Send + 'static + Future<Output = Result<(), Error>>,
|
|
{
|
|
let worker = WorkerTask::new(worker_type, worker_id, userid, to_stdout)?;
|
|
let upid_str = worker.upid.to_string();
|
|
let f = f(worker.clone());
|
|
tokio::spawn(async move {
|
|
let result = f.await;
|
|
worker.log_result(&result);
|
|
});
|
|
|
|
Ok(upid_str)
|
|
}
|
|
|
|
/// Create a new worker thread.
|
|
pub fn new_thread<F>(
|
|
worker_type: &str,
|
|
worker_id: Option<String>,
|
|
userid: Userid,
|
|
to_stdout: bool,
|
|
f: F,
|
|
) -> Result<String, Error>
|
|
where F: Send + UnwindSafe + 'static + FnOnce(Arc<WorkerTask>) -> Result<(), Error>
|
|
{
|
|
println!("register worker thread");
|
|
|
|
let worker = WorkerTask::new(worker_type, worker_id, userid, to_stdout)?;
|
|
let upid_str = worker.upid.to_string();
|
|
|
|
let _child = std::thread::Builder::new().name(upid_str.clone()).spawn(move || {
|
|
let worker1 = worker.clone();
|
|
let result = match std::panic::catch_unwind(move || f(worker1)) {
|
|
Ok(r) => r,
|
|
Err(panic) => {
|
|
match panic.downcast::<&str>() {
|
|
Ok(panic_msg) => {
|
|
Err(format_err!("worker panicked: {}", panic_msg))
|
|
}
|
|
Err(_) => {
|
|
Err(format_err!("worker panicked: unknown type."))
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
worker.log_result(&result);
|
|
});
|
|
|
|
Ok(upid_str)
|
|
}
|
|
|
|
/// create state from self and a result
|
|
pub fn create_state(&self, result: &Result<(), Error>) -> TaskState {
|
|
let warn_count = self.data.lock().unwrap().warn_count;
|
|
|
|
let endtime = Local::now().timestamp();
|
|
|
|
if let Err(err) = result {
|
|
TaskState::Error { message: err.to_string(), endtime }
|
|
} else if warn_count > 0 {
|
|
TaskState::Warning { count: warn_count, endtime }
|
|
} else {
|
|
TaskState::OK { endtime }
|
|
}
|
|
}
|
|
|
|
/// Log task result, remove task from running list
|
|
pub fn log_result(&self, result: &Result<(), Error>) {
|
|
let state = self.create_state(result);
|
|
self.log(state.result_text());
|
|
|
|
WORKER_TASK_LIST.lock().unwrap().remove(&self.upid.task_id);
|
|
let _ = update_active_workers(None);
|
|
super::set_worker_count(WORKER_TASK_LIST.lock().unwrap().len());
|
|
}
|
|
|
|
/// Log a message.
|
|
pub fn log<S: AsRef<str>>(&self, msg: S) {
|
|
let mut data = self.data.lock().unwrap();
|
|
data.logger.log(msg);
|
|
}
|
|
|
|
/// Log a message as warning.
|
|
pub fn warn<S: AsRef<str>>(&self, msg: S) {
|
|
let mut data = self.data.lock().unwrap();
|
|
data.logger.log(format!("WARN: {}", msg.as_ref()));
|
|
data.warn_count += 1;
|
|
}
|
|
|
|
/// Set progress indicator
|
|
pub fn progress(&self, progress: f64) {
|
|
if progress >= 0.0 && progress <= 1.0 {
|
|
let mut data = self.data.lock().unwrap();
|
|
data.progress = progress;
|
|
} else {
|
|
// fixme: log!("task '{}': ignoring strange value for progress '{}'", self.upid, progress);
|
|
}
|
|
}
|
|
|
|
/// Request abort
|
|
pub fn request_abort(&self) {
|
|
eprintln!("set abort flag for worker {}", self.upid);
|
|
self.abort_requested.store(true, Ordering::SeqCst);
|
|
// noitify listeners
|
|
let mut data = self.data.lock().unwrap();
|
|
loop {
|
|
match data.abort_listeners.pop() {
|
|
None => { break; },
|
|
Some(ch) => {
|
|
let _ = ch.send(()); // ignore erros here
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Test if abort was requested.
|
|
pub fn abort_requested(&self) -> bool {
|
|
self.abort_requested.load(Ordering::SeqCst)
|
|
}
|
|
|
|
/// Fail if abort was requested.
|
|
pub fn fail_on_abort(&self) -> Result<(), Error> {
|
|
if self.abort_requested() {
|
|
bail!("abort requested - aborting task");
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
/// Get a future which resolves on task abort
|
|
pub fn abort_future(&self) -> oneshot::Receiver<()> {
|
|
let (tx, rx) = oneshot::channel::<()>();
|
|
|
|
let mut data = self.data.lock().unwrap();
|
|
if self.abort_requested() {
|
|
let _ = tx.send(());
|
|
} else {
|
|
data.abort_listeners.push(tx);
|
|
}
|
|
rx
|
|
}
|
|
|
|
pub fn upid(&self) -> &UPID {
|
|
&self.upid
|
|
}
|
|
}
|