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use anyhow::Result;
use bch_bindgen::bcachefs;
use bch_bindgen::bkey::BkeySC;
use bch_bindgen::btree::BtreeIter;
use bch_bindgen::btree::BtreeIterFlags;
use bch_bindgen::btree::BtreeNodeIter;
use bch_bindgen::btree::BtreeTrans;
use bch_bindgen::fs::Fs;
use bch_bindgen::opt_set;
use clap::Parser;
use std::io::{stdout, IsTerminal};
use crate::logging;
fn list_keys(fs: &Fs, opt: &Cli) -> anyhow::Result<()> {
let trans = BtreeTrans::new(fs);
let mut iter = BtreeIter::new(
&trans,
opt.btree,
opt.start,
BtreeIterFlags::ALL_SNAPSHOTS | BtreeIterFlags::PREFETCH,
);
while let Some(k) = iter.peek_and_restart()? {
if k.k.p > opt.end {
break;
}
if let Some(ty) = opt.bkey_type {
if k.k.type_ != ty as u8 {
iter.advance();
continue;
}
}
println!("{}", k.to_text(fs));
iter.advance();
}
Ok(())
}
fn list_btree_formats(fs: &Fs, opt: &Cli) -> anyhow::Result<()> {
let trans = BtreeTrans::new(fs);
let mut iter = BtreeNodeIter::new(
&trans,
opt.btree,
opt.start,
0,
opt.level,
BtreeIterFlags::PREFETCH,
);
while let Some(b) = iter.peek_and_restart()? {
if b.key.k.p > opt.end {
break;
}
println!("{}", b.to_text(fs));
iter.advance();
}
Ok(())
}
fn list_btree_nodes(fs: &Fs, opt: &Cli) -> anyhow::Result<()> {
let trans = BtreeTrans::new(fs);
let mut iter = BtreeNodeIter::new(
&trans,
opt.btree,
opt.start,
0,
opt.level,
BtreeIterFlags::PREFETCH,
);
while let Some(b) = iter.peek_and_restart()? {
if b.key.k.p > opt.end {
break;
}
println!("{}", BkeySC::from(&b.key).to_text(fs));
iter.advance();
}
Ok(())
}
fn list_nodes_ondisk(fs: &Fs, opt: &Cli) -> anyhow::Result<()> {
let trans = BtreeTrans::new(fs);
let mut iter = BtreeNodeIter::new(
&trans,
opt.btree,
opt.start,
0,
opt.level,
BtreeIterFlags::PREFETCH,
);
while let Some(b) = iter.peek_and_restart()? {
if b.key.k.p > opt.end {
break;
}
println!("{}", b.ondisk_to_text(fs));
iter.advance();
}
Ok(())
}
#[derive(Clone, clap::ValueEnum, Debug)]
enum Mode {
Keys,
Formats,
Nodes,
NodesOndisk,
}
/// List filesystem metadata in textual form
#[derive(Parser, Debug)]
pub struct Cli {
/// Btree to list from
#[arg(short, long, default_value_t=bcachefs::btree_id::BTREE_ID_extents)]
btree: bcachefs::btree_id,
/// Bkey type to list
#[arg(short = 'k', long)]
bkey_type: Option<bcachefs::bch_bkey_type>,
/// Btree depth to descend to (0 == leaves)
#[arg(short, long, default_value_t = 0)]
level: u32,
/// Start position to list from
#[arg(short, long, default_value = "POS_MIN")]
start: bcachefs::bpos,
/// End position
#[arg(short, long, default_value = "SPOS_MAX")]
end: bcachefs::bpos,
#[arg(short, long, default_value = "keys")]
mode: Mode,
/// Check (fsck) the filesystem first
#[arg(short, long)]
fsck: bool,
// FIXME: would be nicer to have `--color[=WHEN]` like diff or ls?
/// Force color on/off. Default: autodetect tty
#[arg(short, long, action = clap::ArgAction::Set, default_value_t=stdout().is_terminal())]
colorize: bool,
/// Quiet mode
#[arg(short, long)]
quiet: bool,
/// Verbose mode
#[arg(short, long, action = clap::ArgAction::Count)]
verbose: u8,
#[arg(required(true))]
devices: Vec<std::path::PathBuf>,
}
fn cmd_list_inner(opt: &Cli) -> anyhow::Result<()> {
let mut fs_opts = bcachefs::bch_opts::default();
opt_set!(fs_opts, nochanges, 1);
opt_set!(fs_opts, read_only, 1);
opt_set!(fs_opts, norecovery, 1);
opt_set!(fs_opts, degraded, 1);
opt_set!(fs_opts, very_degraded, 1);
opt_set!(
fs_opts,
errors,
bcachefs::bch_error_actions::BCH_ON_ERROR_continue as u8
);
if opt.fsck {
opt_set!(
fs_opts,
fix_errors,
bcachefs::fsck_err_opts::FSCK_FIX_yes as u8
);
opt_set!(fs_opts, norecovery, 0);
}
if opt.verbose > 0 {
opt_set!(fs_opts, verbose, 1);
}
let fs = Fs::open(&opt.devices, fs_opts)?;
match opt.mode {
Mode::Keys => list_keys(&fs, opt),
Mode::Formats => list_btree_formats(&fs, opt),
Mode::Nodes => list_btree_nodes(&fs, opt),
Mode::NodesOndisk => list_nodes_ondisk(&fs, opt),
}
}
pub fn list(argv: Vec<String>) -> Result<()> {
let opt = Cli::parse_from(argv);
// TODO: centralize this on the top level CLI
logging::setup(opt.quiet, opt.verbose, opt.colorize);
cmd_list_inner(&opt)
}
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