2018-12-31 16:30:08 +00:00
|
|
|
use failure::*;
|
|
|
|
|
|
|
|
use super::chunk_store::*;
|
|
|
|
use super::chunker::*;
|
|
|
|
|
2019-01-02 11:54:40 +00:00
|
|
|
use std::io::{Read, Write, BufWriter};
|
2018-12-31 16:30:08 +00:00
|
|
|
use std::fs::File;
|
|
|
|
use std::path::{Path, PathBuf};
|
|
|
|
use std::os::unix::io::AsRawFd;
|
|
|
|
use uuid::Uuid;
|
|
|
|
use chrono::{Local, TimeZone};
|
|
|
|
|
|
|
|
#[repr(C)]
|
|
|
|
pub struct ArchiveIndexHeader {
|
|
|
|
pub magic: [u8; 12],
|
|
|
|
pub version: u32,
|
|
|
|
pub uuid: [u8; 16],
|
|
|
|
pub ctime: u64,
|
2019-01-02 11:56:04 +00:00
|
|
|
reserved: [u8; 4056], // overall size is one page (4096 bytes)
|
2018-12-31 16:30:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
pub struct ArchiveIndexWriter<'a> {
|
|
|
|
store: &'a ChunkStore,
|
|
|
|
chunker: Chunker,
|
2019-01-02 11:54:40 +00:00
|
|
|
writer: BufWriter<File>,
|
2019-01-02 10:02:56 +00:00
|
|
|
closed: bool,
|
2018-12-31 16:30:08 +00:00
|
|
|
filename: PathBuf,
|
|
|
|
tmp_filename: PathBuf,
|
|
|
|
uuid: [u8; 16],
|
|
|
|
ctime: u64,
|
|
|
|
|
|
|
|
chunk_offset: usize,
|
|
|
|
last_chunk: usize,
|
|
|
|
chunk_buffer: Vec<u8>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl <'a> ArchiveIndexWriter<'a> {
|
|
|
|
|
|
|
|
pub fn create(store: &'a ChunkStore, path: &Path, chunk_size: usize) -> Result<Self, Error> {
|
|
|
|
|
|
|
|
let full_path = store.relative_path(path);
|
|
|
|
let mut tmp_path = full_path.clone();
|
|
|
|
tmp_path.set_extension("tmp_aidx");
|
|
|
|
|
|
|
|
let mut file = std::fs::OpenOptions::new()
|
|
|
|
.create(true).truncate(true)
|
|
|
|
.read(true)
|
|
|
|
.write(true)
|
|
|
|
.open(&tmp_path)?;
|
|
|
|
|
2019-01-02 11:54:40 +00:00
|
|
|
let mut writer = BufWriter::with_capacity(1024*1024, file);
|
|
|
|
|
2018-12-31 16:30:08 +00:00
|
|
|
let header_size = std::mem::size_of::<ArchiveIndexHeader>();
|
|
|
|
|
|
|
|
// todo: use static assertion when available in rust
|
|
|
|
if header_size != 4096 { panic!("got unexpected header size"); }
|
|
|
|
|
|
|
|
let ctime = std::time::SystemTime::now().duration_since(
|
|
|
|
std::time::SystemTime::UNIX_EPOCH)?.as_secs();
|
|
|
|
|
|
|
|
let uuid = Uuid::new_v4();
|
|
|
|
|
|
|
|
let mut buffer = vec![0u8; header_size];
|
|
|
|
let header = crate::tools::map_struct_mut::<ArchiveIndexHeader>(&mut buffer)?;
|
|
|
|
|
|
|
|
header.magic = *b"PROXMOX-AIDX";
|
|
|
|
header.version = u32::to_le(1);
|
|
|
|
header.ctime = u64::to_le(ctime);
|
|
|
|
header.uuid = *uuid.as_bytes();
|
|
|
|
|
2019-01-02 11:54:40 +00:00
|
|
|
writer.write_all(&buffer)?;
|
2018-12-31 16:30:08 +00:00
|
|
|
|
|
|
|
Ok(Self {
|
|
|
|
store,
|
|
|
|
chunker: Chunker::new(chunk_size),
|
2019-01-02 11:54:40 +00:00
|
|
|
writer: writer,
|
2019-01-02 10:02:56 +00:00
|
|
|
closed: false,
|
2018-12-31 16:30:08 +00:00
|
|
|
filename: full_path,
|
|
|
|
tmp_filename: tmp_path,
|
|
|
|
ctime,
|
|
|
|
uuid: *uuid.as_bytes(),
|
|
|
|
|
|
|
|
chunk_offset: 0,
|
|
|
|
last_chunk: 0,
|
|
|
|
chunk_buffer: Vec::with_capacity(chunk_size*4),
|
|
|
|
})
|
|
|
|
}
|
2019-01-02 10:02:56 +00:00
|
|
|
|
|
|
|
pub fn close(&mut self) -> Result<(), Error> {
|
|
|
|
|
|
|
|
if self.closed {
|
|
|
|
bail!("cannot close already closed archive index file {:?}", self.filename);
|
|
|
|
}
|
|
|
|
|
|
|
|
self.closed = true;
|
|
|
|
|
|
|
|
self.write_chunk_buffer()?;
|
|
|
|
|
2019-01-02 11:54:40 +00:00
|
|
|
self.writer.flush()?;
|
2019-01-02 10:02:56 +00:00
|
|
|
|
|
|
|
// fixme:
|
|
|
|
|
|
|
|
if let Err(err) = std::fs::rename(&self.tmp_filename, &self.filename) {
|
|
|
|
bail!("Atomic rename file {:?} failed - {}", self.filename, err);
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
|
|
|
|
fn write_chunk_buffer(&mut self) -> Result<(), std::io::Error> {
|
|
|
|
|
|
|
|
use std::io::{Error, ErrorKind};
|
|
|
|
|
|
|
|
let chunk_size = self.chunk_buffer.len();
|
|
|
|
|
|
|
|
if chunk_size == 0 { return Ok(()); }
|
|
|
|
|
|
|
|
let expected_chunk_size = self.chunk_offset - self.last_chunk;
|
|
|
|
if expected_chunk_size != self.chunk_buffer.len() {
|
|
|
|
return Err(Error::new(
|
|
|
|
ErrorKind::Other,
|
|
|
|
format!("wrong chunk size {} != {}", expected_chunk_size, chunk_size)));
|
|
|
|
}
|
|
|
|
|
|
|
|
self.last_chunk = self.chunk_offset;
|
|
|
|
|
|
|
|
match self.store.insert_chunk(&self.chunk_buffer) {
|
|
|
|
Ok((is_duplicate, digest)) => {
|
|
|
|
println!("ADD CHUNK {} {} {} {}", self.chunk_offset, chunk_size, is_duplicate, digest_to_hex(&digest));
|
2019-01-02 11:54:40 +00:00
|
|
|
self.writer.write(unsafe { &std::mem::transmute::<u64, [u8;8]>(self.chunk_offset as u64) })?;
|
|
|
|
self.writer.write(&digest)?;
|
2019-01-02 10:02:56 +00:00
|
|
|
self.chunk_buffer.truncate(0);
|
|
|
|
return Ok(());
|
|
|
|
}
|
|
|
|
Err(err) => {
|
|
|
|
self.chunk_buffer.truncate(0);
|
|
|
|
return Err(Error::new(ErrorKind::Other, err.to_string()));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
Ok(())
|
|
|
|
}
|
2018-12-31 16:30:08 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
impl <'a> Write for ArchiveIndexWriter<'a> {
|
|
|
|
|
|
|
|
fn write(&mut self, data: &[u8]) -> std::result::Result<usize, std::io::Error> {
|
|
|
|
|
|
|
|
use std::io::{Error, ErrorKind};
|
|
|
|
|
|
|
|
let chunker = &mut self.chunker;
|
|
|
|
|
|
|
|
let pos = chunker.scan(data);
|
|
|
|
|
|
|
|
if pos > 0 {
|
|
|
|
self.chunk_buffer.extend(&data[0..pos]);
|
|
|
|
self.chunk_offset += pos;
|
|
|
|
|
2019-01-02 10:02:56 +00:00
|
|
|
self.write_chunk_buffer()?;
|
|
|
|
Ok(pos)
|
2018-12-31 16:30:08 +00:00
|
|
|
|
|
|
|
} else {
|
|
|
|
self.chunk_offset += data.len();
|
|
|
|
self.chunk_buffer.extend(data);
|
2019-01-02 10:02:56 +00:00
|
|
|
Ok(data.len())
|
2018-12-31 16:30:08 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn flush(&mut self) -> std::result::Result<(), std::io::Error> {
|
|
|
|
|
2018-12-31 17:01:07 +00:00
|
|
|
use std::io::{Error, ErrorKind};
|
|
|
|
|
2019-01-02 10:02:56 +00:00
|
|
|
Err(Error::new(ErrorKind::Other, "please use close() instead of flush()"))
|
2018-12-31 16:30:08 +00:00
|
|
|
}
|
|
|
|
}
|