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use crate::common::errors::Error;
use crate::common::defs::BlockId;
use crate::common::crc32;
use crate::common::misc::SliceToIntConverter;
use crate::common::misc::alloc_buf;
use crate::common::misc::dealloc_buf;
use crate::block_mgr::block::DataBlock;
use crate::block_mgr::block::FreeInfoSection;
use crate::block_mgr::block::FreeInfoHeaderSection;
use crate::block_mgr::block::ExtentHeaderBlock;
use crate::block_mgr::block::FileHeaderBlock;
use crate::block_mgr::block::FreeInfoBlock;
use crate::block_mgr::block::BasicBlock;
use crate::block_mgr::block::FIBLOCK_HEADER_LEN;
use crate::block_mgr::block::EHBLOCK_HEADER_LEN;
use crate::block_mgr::block::FHBLOCK_HEADER_LEN;
use crate::buf_mgr::buf_mgr::Pinned;
use crate::buf_mgr::buf_mgr::BlockArea;
use crate::storage::fs_ops;
use crate::system::config::ConfigMt;
use std::io::{Read, Write, Seek, SeekFrom};
use std::sync::RwLock;
use std::sync::Arc;
use std::sync::Mutex;
use std::sync::RwLockReadGuard;
use std::sync::atomic::AtomicU16;
use std::sync::atomic::AtomicU64;
use std::sync::atomic::Ordering;
use std::collections::HashMap;
use std::cell::Ref;
use std::cell::RefCell;
use fs2::FileExt;
use log::warn;
use std::ops::DerefMut;
pub const DATA_FILE_MAGIC: u8 = 0x14;
pub const VERSIONING_FILE_MAGIC: u8 = 0x85;
pub const CHECKPOINT_FILE_MAGIC: u8 = 0x35;
pub const LOCK_FILE: &str = "db.lock";
pub const MAX_EXTENT_SIZE: usize = 65500;
pub const MIN_BLOCK_SIZE: usize = 1024;
pub const MAX_BLOCK_SIZE: usize = 65536;
pub const DEFAULT_BLOCK_SIZE: usize = 4096;
pub const MAX_FI_BLOCKS: usize = MAX_EXTENT_SIZE / 8 / MIN_BLOCK_SIZE + 1;
pub const MIN_EXTENT_SIZE: usize = MAX_FI_BLOCKS + 2;
const FILE_IN_USE_MARK: u8 = 1;
pub struct DataStore {
desc_repo: FileDescRepo,
block_size: usize,
block_fill_size: usize,
files: RefCell<HashMap<u16, std::fs::File>>,
block_buf: RefCell<BlockArea>,
path: String,
lock_file: Arc<std::fs::File>,
seq_file_id: Arc<AtomicU16>,
path_buf: RefCell<String>,
}
impl DataStore {
pub fn new(conf: ConfigMt) -> Result<Self, Error> {
let block_fill_ratio = *conf.get_conf().get_block_fill_ratio();
let path = conf.get_conf().get_datastore_path().clone();
let mut ret = Self::open_datastore(path)?;
ret.block_fill_size = ret.block_size * block_fill_ratio as usize / 100;
Ok(ret)
}
pub fn initialize_datastore(path: &str, block_size: usize, desc_set: &[FileDesc]) -> Result<(), Error> {
if (block_size as usize) < MIN_BLOCK_SIZE || (block_size as usize) > MAX_BLOCK_SIZE
|| !block_size.is_power_of_two() {
return Err(Error::incorrect_block_size());
}
let mut lock_file = std::path::PathBuf::new();
lock_file.push(path);
lock_file.push(LOCK_FILE);
let f = std::fs::OpenOptions::new()
.write(true)
.create_new(true)
.open(lock_file)?;
f.try_lock_exclusive()?;
let desc_repo = FileDescRepo::new(vec![], vec![]);
let block_fill_size = block_size * 80 / 100;
let files = HashMap::new();
let block_buf = BlockArea::new(alloc_buf(block_size)?, block_size);
let path = path.to_owned();
let lock_file = Arc::new(f);
let seq_file_id = Arc::new(AtomicU16::new(2));
let ds = DataStore {
desc_repo,
block_size,
block_fill_size,
files: RefCell::new(files),
block_buf: RefCell::new(block_buf),
path,
lock_file,
seq_file_id,
path_buf: RefCell::new(String::new()),
};
for desc in desc_set {
ds.add_datafile(desc.file_type, desc.extent_size, desc.extent_num, desc.max_extent_num)?;
}
Ok(())
}
pub fn load_block(&self, block_id: &BlockId, file_state: FileState) -> Result<Ref<BlockArea>, Error> {
self.seek_to_block(block_id, file_state)?;
let files = self.files.borrow();
let mut f = files.get(&block_id.file_id).unwrap();
let mut block_buf = self.block_buf.borrow_mut();
f.read_exact(&mut block_buf)?;
drop(files);
drop(block_buf);
let block_buf = self.block_buf.borrow();
let mut crc32 = crc32::crc32_begin();
crc32 = crc32::crc32_arr(crc32, &block_buf[4..]);
crc32 = crc32::crc32_finalize(crc32);
if u32::slice_to_int(&block_buf[0..4]).unwrap() != crc32 {
Err(Error::block_crc_mismatch())
} else {
Ok(block_buf)
}
}
pub fn get_file_desc(&self, file_id: u16) -> Option<FileDesc> {
self.desc_repo.get_by_file_id(file_id, FileState::InUse)
}
pub fn get_block_size(&self) -> usize {
self.block_size
}
pub fn block_fill_size(&self) -> usize {
self.block_fill_size
}
pub fn write_block<T: BasicBlock>(&self, block: &mut T, file_state: FileState) -> Result<(), Error> {
let block_id = block.get_id();
self.seek_to_block(&block_id, file_state)?;
block.prepare_for_write();
let files = self.files.borrow();
let mut f = files.get(&block_id.file_id).unwrap();
f.write_all(block.slice())?;
drop(files);
Ok(())
}
pub fn get_checkpoint_files(&self, files: &mut Vec<FileDesc>) {
self.desc_repo.fill_files_vec(files, FileType::CheckpointStoreFile, FileState::InUse);
}
pub fn get_versioning_files(&self, files: &mut Vec<FileDesc>) {
self.desc_repo.fill_files_vec(files, FileType::VersioningStoreFile, FileState::InUse);
}
pub fn get_data_files(&self, files: &mut Vec<FileDesc>) {
self.desc_repo.fill_files_vec(files, FileType::DataStoreFile, FileState::InUse);
}
pub fn clone(&self) -> Result<Self, Error> {
let desc_repo = self.desc_repo.clone();
let block_size = self.block_size;
let block_fill_size = self.block_fill_size;
let block_buf = BlockArea::new(alloc_buf(block_size)?, block_size);
let mut files = HashMap::new();
let mut path_buf = String::new();
for (file_id, _) in self.files.borrow().iter() {
let desc = self.desc_repo.get_by_file_id(*file_id, FileState::InUse).unwrap();
self.desc_repo.get_path(desc.file_id, &mut path_buf);
let f = std::fs::OpenOptions::new()
.read(true)
.write(true)
.create_new(false)
.open(&path_buf)?;
files.insert(*file_id, f);
}
let path = self.path.clone();
let lock_file = self.lock_file.clone();
let seq_file_id = self.seq_file_id.clone();
Ok(DataStore {
desc_repo,
block_size,
block_fill_size,
files: RefCell::new(files),
block_buf: RefCell::new(block_buf),
path,
lock_file,
seq_file_id,
path_buf: RefCell::new(String::new()),
})
}
pub fn add_extent(&self, file_id: u16, file_state: FileState) -> Result<(), Error> {
let desc = self.desc_repo.get_by_file_id(file_id, file_state).unwrap();
if desc.state != file_state {
return Err(Error::file_does_not_exist());
}
if desc.extent_num == desc.max_extent_num {
return Err(Error::extent_limit_reached());
}
let slock = self.desc_repo.lock_file(file_id).ok_or(Error::file_does_not_exist())?;
let mutex = slock.get(&file_id).unwrap();
let file_lock = mutex.lock().unwrap();
let extent_start_pos = ((desc.extent_num - 1) as u64 * desc.extent_size as u64
+ (self.calc_file_fi_block_num(desc.max_extent_num as usize) as u64) + 1) * self.block_size as u64;
let files = self.files.borrow();
let mut f = files.get(&file_id).unwrap();
f.set_len(extent_start_pos + (desc.extent_size as u64 * self.block_size as u64))?;
f.seek(SeekFrom::Start(extent_start_pos))?;
let mut block_id = BlockId {
file_id,
extent_id: desc.extent_num,
block_id: 0,
};
let stub_pin = AtomicU64::new(1000);
self.zero_block_buf();
let mut ehb = ExtentHeaderBlock::new(block_id, 0, Pinned::<BlockArea>::new(self.block_buf.borrow().clone(), &stub_pin));
let fi_block_num = self.calc_extent_fi_block_num(desc.extent_size as usize);
ehb.set_fi_size(desc.extent_size);
ehb.set_full_cnt(fi_block_num as u16 + 1);
for i in 0..fi_block_num + 1 {
ehb.fi_slice_mut()[i/8] |= 1 << (i%8);
}
self.write_block_direct(&mut ehb, &f)?;
if ehb.fi_slice().len() * 8 < desc.extent_size as usize {
self.add_fi_blocks(&mut block_id, fi_block_num, &stub_pin, &f)?;
}
self.zero_block_buf();
let mut db = DataBlock::new(block_id, 0, Pinned::<BlockArea>::new(self.block_buf.borrow().clone(), &stub_pin));
for _ in 0..desc.extent_size {
block_id.block_id += 1;
db.set_id(block_id);
self.write_block_direct(&mut db, &f)?;
}
f.sync_data()?;
drop(files);
self.desc_repo.add_extent(file_id);
drop(file_lock);
drop(slock);
Ok(())
}
pub fn add_datafile(&self, file_type: FileType, extent_size: u16, extent_num: u16, max_extent_num: u16) -> Result<u16, Error> {
if (extent_size as usize) < MIN_EXTENT_SIZE || (extent_size as usize) > MAX_EXTENT_SIZE {
return Err(Error::incorrect_extent_size());
}
if extent_num < 2 || max_extent_num < extent_num {
return Err(Error::incorrect_extent_settings());
}
let file_id = self.next_file_id()?;
let mut file_path = std::path::PathBuf::new();
file_path.push(&self.path);
file_path.push(format!("{}.dat", file_id));
if let Some(file_path) = file_path.to_str() {
let path = file_path.to_owned();
let mut desc = FileDesc {
state: FileState::Initializing,
file_id,
extent_size,
extent_num: 0,
max_extent_num,
file_type,
};
self.desc_repo.add_file(desc, path.clone());
desc.extent_num = extent_num;
self.create_file(&desc, &path)?;
self.desc_repo.add_extent(desc.file_id);
for _ in 0..extent_num - 1 {
self.add_extent(desc.file_id, FileState::Initializing)?;
}
self.set_file_in_use(file_id)?;
} else {
return Err(Error::failed_to_build_path());
}
Ok(file_id)
}
pub fn calc_extent_fi_block_num(&self, extent_size: usize) -> usize {
let byte_sz = (extent_size + 1) / 8;
let hdrfilen = self.block_size - EHBLOCK_HEADER_LEN;
if byte_sz > hdrfilen {
let divizor = self.block_size - FIBLOCK_HEADER_LEN;
(byte_sz - hdrfilen + divizor - 1) / divizor
} else {
0
}
}
fn calc_file_fi_block_num(&self, max_extent_num: usize) -> usize {
let byte_sz = (max_extent_num + 1) / 8;
let hdrfilen = self.block_size - FHBLOCK_HEADER_LEN;
if byte_sz > hdrfilen {
let divizor = self.block_size - FIBLOCK_HEADER_LEN;
(byte_sz - hdrfilen + divizor - 1) / divizor
} else {
0
}
}
fn add_fi_blocks(&self, mut block_id: &mut BlockId, fi_block_num: usize, stub_pin: &AtomicU64, f: &std::fs::File) -> Result<(), Error> {
self.zero_block_buf();
let mut fib = FreeInfoBlock::new(*block_id, 0, Pinned::<BlockArea>::new(self.block_buf.borrow().clone(), stub_pin));
for _ in 0..fi_block_num {
block_id.block_id += 1;
fib.set_id(*block_id);
self.write_block_direct(&mut fib, &f)?;
}
Ok(())
}
fn open_datastore(path: String) -> Result<DataStore, Error> {
let mut lock_file = std::path::PathBuf::new();
lock_file.push(&path);
lock_file.push(LOCK_FILE);
let f = std::fs::OpenOptions::new()
.write(true)
.create_new(false)
.open(lock_file)?;
f.try_lock_exclusive()?;
let (files, desc_set, block_size, paths) = Self::load_files(&path)?;
let block_buf = BlockArea::new(alloc_buf(block_size)?, block_size);
let desc_repo = FileDescRepo::new(desc_set, paths);
let block_fill_size = block_size * 80 / 100;
let mut seq_file_id = 2;
for (file_id, _) in files.iter() {
if *file_id > seq_file_id {
seq_file_id = *file_id;
}
}
let path = String::from(path);
let lock_file = Arc::new(f);
let seq_file_id = Arc::new(AtomicU16::new(seq_file_id));
Ok(DataStore {
desc_repo,
block_size,
block_fill_size,
files: RefCell::new(files),
block_buf: RefCell::new(block_buf),
path,
lock_file,
seq_file_id,
path_buf: RefCell::new(String::new()),
})
}
fn load_files(datastore_path: &str) -> Result<(HashMap<u16, std::fs::File>, Vec<FileDesc>, usize, Vec<String>), Error> {
let mut desc_set = Vec::new();
let mut paths = Vec::new();
let mut files = HashMap::new();
let mut block_size = DEFAULT_BLOCK_SIZE;
fs_ops::traverse_dir(std::path::Path::new(datastore_path), false, |entry| -> Result<(), Error> {
if entry.path().is_file() &&
entry.path().extension() == Some(std::ffi::OsStr::new("dat"))
{
if let Some(path) = entry.path().to_str() {
let (f, desc, block_sz) = Self::open_file(&path)?;
files.insert(desc.file_id, f);
paths.push(path.to_owned());
desc_set.push(desc);
block_size = block_sz;
}
}
Ok(())
})?;
Ok((files, desc_set, block_size, paths))
}
fn open_file(path: &str) -> Result<(std::fs::File, FileDesc, usize), Error> {
let mut f = std::fs::OpenOptions::new()
.read(true)
.write(true)
.create_new(false)
.open(path)?;
let mut header = [0u8; FHBLOCK_HEADER_LEN];
f.read_exact(&mut header)?;
let file_type = match header[18] {
DATA_FILE_MAGIC => FileType::DataStoreFile,
CHECKPOINT_FILE_MAGIC => FileType::CheckpointStoreFile,
VERSIONING_FILE_MAGIC => FileType::VersioningStoreFile,
_ => return Err(Error::magic_mismatch())
};
if header[19] != FILE_IN_USE_MARK {
return Err(Error::data_file_not_initialized());
}
let block_size = u16::slice_to_int(&header[20..22])?;
let extent_size = u16::slice_to_int(&header[22..24])?;
let max_extent_num = u16::slice_to_int(&header[24..26])?;
let file_id = u16::slice_to_int(&header[26..28])?;
let extent_num = if file_type == FileType::CheckpointStoreFile {
let byte_sz = (max_extent_num + 1) / 8;
let hdrfilen = block_size - FHBLOCK_HEADER_LEN as u16;
let fhe_size = if byte_sz > hdrfilen {
let divizor = block_size - FIBLOCK_HEADER_LEN as u16;
(byte_sz - hdrfilen + divizor - 1) / divizor
} else {
0
} + 1;
let fhe_size = fhe_size * block_size;
((f.seek(SeekFrom::End(0))? - fhe_size as u64) / extent_size as u64 / block_size as u64) as u16 + 1
} else if file_type == FileType::VersioningStoreFile {
1
} else {
u16::slice_to_int(&header[30..32])?
};
Ok((
f,
FileDesc {
state: FileState::InUse,
file_id,
extent_size,
extent_num,
max_extent_num,
file_type,
},
block_size as usize
))
}
fn zero_block_buf(&self) {
let ba: &mut BlockArea = &mut self.block_buf.borrow_mut();
for b in ba.deref_mut() { *b = 0; }
}
fn create_file(&self, desc: &FileDesc, path: &str) -> Result<(), Error> {
let f = std::fs::OpenOptions::new()
.read(true)
.write(true)
.create_new(true)
.open(path)?;
let mut block_id = BlockId {
file_id: desc.file_id,
extent_id: 0,
block_id: 0,
};
let stub_pin = AtomicU64::new(1000);
self.zero_block_buf();
self.load_fhb_from_desc(desc);
let mut fhb = FileHeaderBlock::new(block_id, 0, Pinned::<BlockArea>::new(self.block_buf.borrow().clone(), &stub_pin));
fhb.set_full_cnt(1);
fhb.fi_slice_mut()[0] = 0x01;
fhb.set_block_size(self.get_block_size() as u16);
fhb.set_in_use(false);
self.write_block_direct(&mut fhb, &f)?;
if fhb.fi_slice().len() * 8 < desc.max_extent_num as usize {
let fi_block_num = self.calc_file_fi_block_num(desc.max_extent_num as usize);
self.add_fi_blocks(&mut block_id, fi_block_num, &stub_pin, &f)?;
}
let mut files = self.files.borrow_mut();
files.insert(desc.file_id, f);
drop(files);
Ok(())
}
fn set_file_in_use(&self, file_id: u16) -> Result<(), Error> {
let block_id = BlockId {
file_id,
extent_id: 0,
block_id: 0,
};
let stub_pin = AtomicU64::new(1000);
let ba = self.load_block(&block_id, FileState::Initializing)?;
let mut fhb = FileHeaderBlock::new(block_id, 0, Pinned::<BlockArea>::new(ba.clone(), &stub_pin));
drop(ba);
fhb.set_in_use(true);
self.write_block(&mut fhb, FileState::Initializing)?;
self.desc_repo.set_state(file_id, FileState::InUse);
Ok(())
}
fn load_fhb_from_desc(&self, desc: &FileDesc) {
let data = &mut self.block_buf.borrow_mut();
data[18] = desc.file_type as u8;
data[22..24].copy_from_slice(&desc.extent_size.to_ne_bytes());
data[24..26].copy_from_slice(&desc.max_extent_num.to_ne_bytes());
data[26..28].copy_from_slice(&desc.file_id.to_ne_bytes());
data[30..32].copy_from_slice(&desc.extent_num.to_ne_bytes());
}
fn next_file_id(&self) -> Result<u16, Error> {
let mut current = self.seq_file_id.load(Ordering::Relaxed);
loop {
if current == std::u16::MAX {
return Err(Error::file_id_overflow());
}
if let Err(ret) = self.seq_file_id.compare_exchange(current, current+1, Ordering::Relaxed, Ordering::Relaxed) {
current = ret;
} else {
return Ok(current + 1);
}
}
}
fn seek_to_block(&self, block_id: &BlockId, file_state: FileState) -> Result<(), Error> {
if let Some(desc) = self.desc_repo.get_by_file_id(block_id.file_id, file_state) {
let fhe_size = self.calc_file_fi_block_num(desc.max_extent_num as usize) + 1;
if desc.extent_num > block_id.extent_id {
if (desc.extent_size > block_id.block_id && block_id.extent_id > 0 ) || (block_id.extent_id == 0 && block_id.block_id < fhe_size as u16) {
let mut files = self.files.borrow_mut();
let mut f = if files.contains_key(&block_id.file_id) {
files.get(&block_id.file_id).unwrap()
} else {
let mut path_buf = self.path_buf.borrow_mut();
self.desc_repo.get_path(desc.file_id, &mut path_buf);
let file = std::fs::OpenOptions::new()
.read(true)
.write(true)
.create_new(false)
.open(&path_buf as &str)?;
files.insert(block_id.file_id, file);
files.get(&block_id.file_id).unwrap()
};
let eff_extent_pos = if block_id.extent_id == 0 {
0
} else {
(block_id.extent_id - 1) as u64 * desc.extent_size as u64 + fhe_size as u64
};
let file_pos = (eff_extent_pos + block_id.block_id as u64) * self.block_size as u64;
f.seek(SeekFrom::Start(file_pos))?;
Ok(())
} else {
Err(Error::block_does_not_exist())
}
} else {
Err(Error::extent_does_not_exist())
}
} else {
Err(Error::file_does_not_exist())
}
}
pub fn write_block_direct<T: BasicBlock>(&self, block: &mut T, mut f: &std::fs::File) -> Result<(), Error> {
block.prepare_for_write();
f.write_all(block.slice())?;
Ok(())
}
}
impl Drop for DataStore {
fn drop(&mut self) {
for (_, f) in self.files.borrow_mut().drain() {
if let Err(e) = f.sync_all() {
warn!("Error while closing datastore file: {}", e);
}
}
if Arc::strong_count(&self.lock_file) == 1 {
if let Err(e) = self.lock_file.unlock() {
warn!("Error while closing datastore lock file: {}", e);
}
}
let block_buf = self.block_buf.borrow();
let v = dealloc_buf(block_buf.data_ptr(), block_buf.size());
drop(v);
}
}
#[derive(Copy, Clone, Eq, PartialEq, Debug, Hash)]
pub enum FileState {
Initializing = 0,
InUse = 1,
}
#[derive(Hash, Eq, PartialEq, Clone, Copy, Debug)]
pub enum FileType {
DataStoreFile = DATA_FILE_MAGIC as isize,
CheckpointStoreFile = CHECKPOINT_FILE_MAGIC as isize,
VersioningStoreFile = VERSIONING_FILE_MAGIC as isize,
}
#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
pub struct FileDesc {
pub state: FileState,
pub file_id: u16,
pub extent_size: u16,
pub extent_num: u16,
pub max_extent_num: u16,
pub file_type: FileType,
}
#[derive(Clone)]
struct FileDescRepo {
fd: Arc<RwLock<HashMap<u16, (FileDesc, String)>>>,
locks: Arc<RwLock<HashMap<u16, Mutex<()>>>>,
}
impl FileDescRepo {
fn new(mut desc_set: Vec<FileDesc>, mut paths: Vec<String>) -> Self {
let mut hm = HashMap::new();
let mut hm2 = HashMap::new();
for desc in desc_set.drain(..) {
hm.insert(desc.file_id, (desc, paths.remove(0)));
hm2.insert(desc.file_id, Mutex::new(()));
}
let fd = Arc::new(RwLock::new(hm));
let locks = Arc::new(RwLock::new(hm2));
FileDescRepo {
fd,
locks,
}
}
fn add_file(&self, desc: FileDesc, path: String) {
let mut xlock = self.fd.write().unwrap();
xlock.insert(desc.file_id, (desc, path));
let mut xlock = self.locks.write().unwrap();
xlock.insert(desc.file_id, Mutex::new(()));
}
fn fill_files_vec(&self, files: &mut Vec<FileDesc>, file_type: FileType, state: FileState) {
files.truncate(0);
let slock = self.fd.read().unwrap();
for (_, desc) in slock.iter() {
if desc.0.file_type == file_type && desc.0.state == state {
files.push(desc.0);
}
}
}
fn get_by_file_id(&self, file_id: u16, state: FileState) -> Option<FileDesc> {
let slock = self.fd.read().unwrap();
if let Some(desc) = slock.get(&file_id) {
if desc.0.state == state {
Some(desc.0)
} else {
None
}
} else {
None
}
}
fn get_path(&self, file_id: u16, dst: &mut String) {
let slock = self.fd.read().unwrap();
if let Some(desc) = slock.get(&file_id) {
dst.truncate(0);
dst.push_str(&desc.1);
}
}
fn add_extent(&self, file_id: u16) {
let mut xlock = self.fd.write().unwrap();
let mut desc = xlock.get_mut(&file_id).unwrap();
desc.0.extent_num += 1;
}
fn set_state(&self, file_id: u16, state: FileState) {
let mut xlock = self.fd.write().unwrap();
let mut desc = xlock.get_mut(&file_id).unwrap();
desc.0.state = state;
}
fn lock_file(&self, file_id: u16) -> Option<RwLockReadGuard<HashMap<u16, Mutex<()>>>> {
let slock = self.locks.read().unwrap();
if slock.contains_key(&file_id) {
Some(slock)
} else {
None
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::path::Path;
#[test]
fn test_datastore() {
let dspath = "/tmp/test456343567578".to_owned();
let block_size = 8192;
if Path::new(&dspath).exists() {
std::fs::remove_dir_all(&dspath).expect("Failed to delete test dir on cleanup");
}
std::fs::create_dir(&dspath).expect("Failed to create test dir");
let conf = ConfigMt::new();
let mut c = conf.get_conf();
c.set_datastore_path(dspath.clone());
drop(c);
let mut fdset = vec![];
let desc1 = FileDesc {
state: FileState::InUse,
file_id: 3,
extent_size: 10,
extent_num: 2,
max_extent_num: 2,
file_type: FileType::DataStoreFile,
};
let mut desc2 = FileDesc {
state: FileState::InUse,
file_id: 4,
extent_size: 10,
extent_num: 2,
max_extent_num: 65500,
file_type: FileType::VersioningStoreFile,
};
let desc3 = FileDesc {
state: FileState::InUse,
file_id: 5,
extent_size: 10,
extent_num: 3,
max_extent_num: 65500,
file_type: FileType::CheckpointStoreFile,
};
fdset.push(desc1);
fdset.push(desc2);
fdset.push(desc3);
DataStore::initialize_datastore(&dspath, block_size, &fdset).expect("Failed to init datastore");
desc2.extent_num = 1;
fdset[1].extent_num = 1;
let ds = DataStore::new(conf.clone()).expect("Failed to open datastore");
for desc in fdset {
for extent_id in 0..desc.extent_num {
let mut block_id = BlockId {
file_id: desc.file_id,
extent_id,
block_id: 0,
};
let bn = if extent_id == 0 {
ds.calc_file_fi_block_num(desc.max_extent_num as usize)
} else {
desc.extent_num as usize
};
for bid in 0..bn {
block_id.block_id = bid as u16;
let block: Ref<BlockArea> = ds.load_block(&block_id, FileState::InUse).expect("Failed to load block");
drop(block);
}
}
}
let desc = ds.get_file_desc(3).expect("No file description for file id found");
assert_eq!(desc, desc1);
let desc = ds.get_file_desc(4).expect("No file description for file id found");
assert_eq!(desc, desc2);
let desc = ds.get_file_desc(5).expect("No file description for file id found");
assert_eq!(desc, desc3);
let bsz = ds.get_block_size();
assert_eq!(block_size, bsz);
let bfsz = ds.block_fill_size();
assert_eq!(*conf.get_conf().get_block_fill_ratio() as usize * block_size / 100, bfsz);
let block_id = BlockId {
file_id: 3,
extent_id: 1,
block_id: 5,
};
let stub_pin = AtomicU64::new(1000);
let block_buf = BlockArea::new(alloc_buf(block_size).expect("Allocation failure"), block_size);
let mut db = DataBlock::new(block_id, 0, Pinned::<BlockArea>::new(block_buf.clone(), &stub_pin));
ds.write_block(&mut db, FileState::InUse).expect("Failed to write block to disk");
drop(db);
dealloc_buf(block_buf.data_ptr(), block_size);
let mut files = Vec::new();
ds.get_checkpoint_files(&mut files);
assert_eq!(1, files.len());
assert_eq!(desc3, files[0]);
ds.get_versioning_files(&mut files);
assert_eq!(1, files.len());
assert_eq!(desc2, files[0]);
ds.get_data_files(&mut files);
assert_eq!(1, files.len());
assert_eq!(desc1, files[0]);
let ds2 = ds.clone().expect("Failed to clone ds");
ds.add_extent(5, FileState::InUse).expect("Failed to add extent");
let desc = ds.get_file_desc(5).expect("No file description for file id found");
assert_eq!(desc.extent_num, desc3.extent_num + 1);
let mut block_id = BlockId {
file_id: 5,
extent_id: desc.extent_num-1,
block_id: 0,
};
for i in 0..desc.extent_size {
block_id.block_id = i;
let block: Ref<BlockArea> = ds.load_block(&block_id, FileState::InUse).expect("Failed to load block");
drop(block);
}
let file_id = ds2.add_datafile(FileType::DataStoreFile, 16, 3, 3).expect("Failed to add a data file");
let desc = ds.get_file_desc(file_id).expect("No file description for file id found");
assert_eq!(FileType::DataStoreFile, desc.file_type);
assert_eq!(16, desc.extent_size);
assert_eq!(3, desc.extent_num);
assert_eq!(3, desc.max_extent_num);
}
}