btrfs_cli/filesystem/
commit_stats.rs

1use crate::{Format, Runnable};
2use anyhow::{Context, Result};
3use btrfs_uapi::{filesystem::filesystem_info, sysfs::SysfsBtrfs};
4use clap::Parser;
5use std::{fs::File, os::unix::io::AsFd, path::PathBuf};
6
7/// Show commit statistics for a mounted filesystem
8#[derive(Parser, Debug)]
9pub struct FilesystemCommitStatsCommand {
10    /// Print stats then reset the max_commit_ms counter (requires root)
11    #[clap(long, short = 'z')]
12    pub reset: bool,
13
14    pub path: PathBuf,
15}
16
17impl Runnable for FilesystemCommitStatsCommand {
18    fn run(&self, _format: Format, _dry_run: bool) -> Result<()> {
19        let file = File::open(&self.path).with_context(|| {
20            format!("failed to open '{}'", self.path.display())
21        })?;
22
23        let info = filesystem_info(file.as_fd()).with_context(|| {
24            format!(
25                "failed to get filesystem info for '{}'",
26                self.path.display()
27            )
28        })?;
29
30        let sysfs = SysfsBtrfs::new(&info.uuid);
31
32        let stats = sysfs
33            .commit_stats()
34            .context("failed to read commit_stats from sysfs")?;
35
36        println!("UUID: {}", info.uuid.as_hyphenated());
37        println!("Commit stats since mount:");
38        println!("  {:<28}{:>8}", "Total commits:", stats.commits);
39        println!(
40            "  {:<28}{:>8}ms",
41            "Last commit duration:", stats.last_commit_ms
42        );
43        println!(
44            "  {:<28}{:>8}ms",
45            "Max commit duration:", stats.max_commit_ms
46        );
47        println!(
48            "  {:<28}{:>8}ms",
49            "Total time spent in commit:", stats.total_commit_ms
50        );
51
52        if self.reset {
53            sysfs
54                .reset_commit_stats()
55                .context("failed to reset commit_stats (requires root)")?;
56            println!("NOTE: Max commit duration has been reset");
57        }
58
59        Ok(())
60    }
61}
btrfs_cli/filesystem/commit_stats.rs

btrfs_cli/filesystem/
commit_stats.rs
