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use anyhow::Result;
use btrfs_stream::{StreamCommand, StreamReader, Timespec};
use std::io::Read;
fn fmt_timespec(ts: &Timespec) -> String {
format!("{}.{}", ts.sec, ts.nsec)
}
fn fmt_uuid(uuid: &uuid::Uuid) -> String {
uuid.as_hyphenated().to_string()
}
#[allow(clippy::too_many_lines)]
pub fn dump_stream<R: Read>(input: R) -> Result<()> {
let mut reader = StreamReader::new(input)?;
loop {
match reader.next_command()? {
None => break,
Some(cmd) => match &cmd {
StreamCommand::Subvol {
path,
uuid,
ctransid,
} => {
println!(
"subvol ./{path} uuid={} transid={ctransid}",
fmt_uuid(uuid)
);
}
StreamCommand::Snapshot {
path,
uuid,
ctransid,
clone_uuid,
clone_ctransid,
} => {
println!(
"snapshot ./{path} uuid={} transid={ctransid} parent_uuid={} parent_transid={clone_ctransid}",
fmt_uuid(uuid),
fmt_uuid(clone_uuid)
);
}
StreamCommand::Mkfile { path } => {
println!("mkfile ./{path}");
}
StreamCommand::Mkdir { path } => {
println!("mkdir ./{path}");
}
StreamCommand::Mknod { path, mode, rdev } => {
println!(
"mknod ./{path} mode={mode} rdev={rdev:#x}"
);
}
StreamCommand::Mkfifo { path } => {
println!("mkfifo ./{path}");
}
StreamCommand::Mksock { path } => {
println!("mksock ./{path}");
}
StreamCommand::Symlink { path, target } => {
println!("symlink ./{path} dest=./{target}");
}
StreamCommand::Rename { from, to } => {
println!("rename ./{from} dest=./{to}");
}
StreamCommand::Link { path, target } => {
println!("link ./{path} dest=./{target}");
}
StreamCommand::Unlink { path } => {
println!("unlink ./{path}");
}
StreamCommand::Rmdir { path } => {
println!("rmdir ./{path}");
}
StreamCommand::Write { path, offset, data } => {
println!(
"write ./{path} offset={offset} len={}",
data.len()
);
}
StreamCommand::Clone {
path,
offset,
len,
clone_uuid,
clone_ctransid,
clone_path,
clone_offset,
} => {
println!(
"clone ./{path} offset={offset} len={len} from={} offset={clone_offset} transid={clone_ctransid} uuid={}",
clone_path,
fmt_uuid(clone_uuid)
);
}
StreamCommand::SetXattr { path, name, data } => {
println!(
"set_xattr ./{path} name={name} len={}",
data.len()
);
}
StreamCommand::RemoveXattr { path, name } => {
println!("remove_xattr ./{path} name={name}");
}
StreamCommand::Truncate { path, size } => {
println!("truncate ./{path} size={size}");
}
StreamCommand::Chmod { path, mode } => {
println!("chmod ./{path} mode={mode:o}");
}
StreamCommand::Chown { path, uid, gid } => {
println!("chown ./{path} uid={uid} gid={gid}");
}
StreamCommand::Utimes {
path,
atime,
mtime,
ctime,
} => {
println!(
"utimes ./{path} atime={} mtime={} ctime={}",
fmt_timespec(atime),
fmt_timespec(mtime),
fmt_timespec(ctime)
);
}
StreamCommand::UpdateExtent { path, offset, len } => {
println!(
"update_extent ./{path} offset={offset} len={len}"
);
}
StreamCommand::EncodedWrite {
path,
offset,
unencoded_file_len,
unencoded_len,
unencoded_offset,
compression,
encryption,
data,
} => {
println!(
"encoded_write ./{path} offset={offset} len={} unencoded_file_len={unencoded_file_len} unencoded_len={unencoded_len} unencoded_offset={unencoded_offset} compression={compression} encryption={encryption}",
data.len()
);
}
StreamCommand::Fallocate {
path,
mode,
offset,
len,
} => {
println!(
"fallocate ./{path} mode={mode} offset={offset} len={len}"
);
}
StreamCommand::Fileattr { path, attr } => {
println!("fileattr ./{path} fileattr=0x{attr:x}");
}
StreamCommand::EnableVerity {
path,
algorithm,
block_size,
salt,
sig,
} => {
println!(
"enable_verity ./{path} algorithm={algorithm} block_size={block_size} salt_len={} sig_len={}",
salt.len(),
sig.len()
);
}
StreamCommand::End => {
println!("end");
}
},
}
}
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
use uuid::Uuid;
#[test]
fn fmt_timespec_zero() {
let ts = Timespec { sec: 0, nsec: 0 };
assert_eq!(fmt_timespec(&ts), "0.0");
}
#[test]
fn fmt_timespec_nonzero() {
let ts = Timespec {
sec: 1234567890,
nsec: 123456789,
};
assert_eq!(fmt_timespec(&ts), "1234567890.123456789");
}
#[test]
fn fmt_uuid_nil() {
let uuid = Uuid::nil();
assert_eq!(fmt_uuid(&uuid), "00000000-0000-0000-0000-000000000000");
}
#[test]
fn fmt_uuid_specific() {
let uuid =
Uuid::parse_str("550e8400-e29b-41d4-a716-446655440000").unwrap();
assert_eq!(fmt_uuid(&uuid), "550e8400-e29b-41d4-a716-446655440000");
}
}