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src/backup/fixed_index.rs: store index_length to avoid code duplication

This commit is contained in:
Dietmar Maurer 2019-05-28 08:27:57 +02:00
parent e3d525feb7
commit e1225de467
1 changed files with 15 additions and 11 deletions
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26
src/backup/fixed_index.rs
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@ -34,6 +34,7 @@ pub struct FixedIndexReader {
filename: PathBuf,
pub chunk_size: usize,
pub size: usize,
index_length: usize,
index: *mut u8,
pub uuid: [u8; 16],
pub ctime: u64,
@ -86,7 +87,8 @@ impl FixedIndexReader {
let ctime = u64::from_le(header.ctime);
let chunk_size = u64::from_le(header.chunk_size) as usize;
let index_size = ((size + chunk_size - 1)/chunk_size)*32;
let index_length = (size + chunk_size - 1)/chunk_size;
let index_size = index_length*32;
let rawfd = file.as_raw_fd();
@ -115,6 +117,7 @@ impl FixedIndexReader {
_file: file,
chunk_size,
size,
index_length,
index: data,
ctime,
uuid: header.uuid,
@ -125,7 +128,7 @@ impl FixedIndexReader {
if self.index == std::ptr::null_mut() { return Ok(()); }
let index_size = ((self.size + self.chunk_size - 1)/self.chunk_size)*32;
let index_size = self.index_length*32;
if let Err(err) = unsafe { nix::sys::mman::munmap(self.index as *mut std::ffi::c_void, index_size) } {
bail!("unmap file {:?} failed - {}", self.filename, err);
@ -140,12 +143,10 @@ impl FixedIndexReader {
if self.index == std::ptr::null_mut() { bail!("detected closed index file."); }
let index_count = self.index_count();
status.used_bytes += self.index_length * self.chunk_size;
status.used_chunks += self.index_length;
status.used_bytes += index_count * self.chunk_size;
status.used_chunks += index_count;
for pos in 0..index_count {
for pos in 0..self.index_length {
tools::fail_on_shutdown()?;
@ -170,11 +171,11 @@ impl FixedIndexReader {
impl IndexFile for FixedIndexReader {
fn index_count(&self) -> usize {
(self.size + self.chunk_size - 1)/self.chunk_size
self.index_length
}
fn index_digest(&self, pos: usize) -> Option<&[u8; 32]> {
if pos >= self.index_count() {
if pos >= self.index_length {
None
} else {
Some(unsafe { std::mem::transmute(self.index.add(pos*32)) })
@ -192,6 +193,7 @@ pub struct FixedIndexWriter {
stat: ChunkStat,
size: usize,
index_length: usize,
index: *mut u8,
pub uuid: [u8; 16],
pub ctime: u64,
@ -248,7 +250,8 @@ impl FixedIndexWriter {
file.write_all(&buffer)?;
let index_size = ((size + chunk_size - 1)/chunk_size)*32;
let index_length = (size + chunk_size - 1)/chunk_size;
let index_size = index_length*32;
nix::unistd::ftruncate(file.as_raw_fd(), (header_size + index_size) as i64)?;
let data = unsafe { nix::sys::mman::mmap(
@ -268,6 +271,7 @@ impl FixedIndexWriter {
chunk_size,
size,
stat: ChunkStat::new(size as u64),
index_length,
index: data,
ctime,
uuid: *uuid.as_bytes(),
@ -278,7 +282,7 @@ impl FixedIndexWriter {
if self.index == std::ptr::null_mut() { return Ok(()); }
let index_size = ((self.size + self.chunk_size - 1)/self.chunk_size)*32;
let index_size = self.index_length*32;
if let Err(err) = unsafe { nix::sys::mman::munmap(self.index as *mut std::ffi::c_void, index_size) } {
bail!("unmap file {:?} failed - {}", self.tmp_filename, err);