| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `common/rusty_leveldb_sgx/src/disk_env.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>disk_env.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../rusty_leveldb/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../rusty_leveldb/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::env::{path_to_str, Env, FileLock, Logger, RandomAccess}; |
| <span class="kw">use </span><span class="kw">crate</span>::env_common::micros; |
| <span class="kw">use </span><span class="kw">crate</span>::error::{err, <span class="prelude-ty">Result</span>, Status, StatusCode}; |
| |
| <span class="kw">use </span>std::collections::HashMap; |
| <span class="kw">use </span>std::io::{<span class="self">self</span>, Read, Write}; |
| <span class="kw">use </span>std::io::{Seek, SeekFrom}; |
| <span class="kw">use </span>std::iter::FromIterator; |
| <span class="kw">use </span>std::path::{Path, PathBuf}; |
| <span class="kw">use </span>std::sync::{Arc, Mutex}; |
| <span class="kw">use </span>std::untrusted::fs; |
| <span class="kw">use </span>std::untrusted::path::PathEx; |
| |
| <span class="kw">pub type </span>DBPersistKey = [u8; <span class="number">16</span>]; |
| |
| <span class="kw">const </span>F_RDLCK: libc::c_short = <span class="number">0</span>; |
| <span class="kw">const </span>F_WRLCK: libc::c_short = <span class="number">1</span>; |
| <span class="kw">const </span>F_UNLCK: libc::c_short = <span class="number">2</span>; |
| |
| <span class="kw">type </span>FileDescriptor = i32; |
| |
| <span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>PosixDiskEnv { |
| locks: Arc<Mutex<HashMap<String, sgx_tprotected_fs::SgxFile>>>, |
| key: DBPersistKey, |
| } |
| |
| <span class="kw">impl </span>PosixDiskEnv { |
| <span class="kw">pub fn </span>new_with(key: DBPersistKey) -> PosixDiskEnv { |
| PosixDiskEnv { |
| locks: Arc::new(Mutex::new(HashMap::new())), |
| key, |
| } |
| } |
| } |
| |
| <span class="doccomment">/// map_err_with_name annotates an io::Error with information about the operation and the file. |
| </span><span class="kw">fn </span>map_err_with_name(method: <span class="kw-2">&</span><span class="lifetime">'static </span>str, f: <span class="kw-2">&</span>Path, e: io::Error) -> Status { |
| <span class="kw">let </span><span class="kw-2">mut </span>s = Status::from(e); |
| s.err = <span class="macro">format!</span>(<span class="string">"{}: {}: {}"</span>, method, s.err, path_to_str(f)); |
| s |
| } |
| |
| <span class="comment">// Note: We're using Ok(f()?) in several locations below in order to benefit from the automatic |
| // error conversion using std::convert::From. |
| </span><span class="kw">impl </span>Env <span class="kw">for </span>PosixDiskEnv { |
| <span class="kw">fn </span>open_sequential_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>Read>> { |
| <span class="prelude-val">Ok</span>(Box::new( |
| sgx_tprotected_fs::OpenOptions::default() |
| .read(<span class="bool-val">true</span>) |
| .open_with_key(p, <span class="self">self</span>.key) |
| .map_err(|e| map_err_with_name(<span class="string">"open_sgx (seq)"</span>, p, e))<span class="question-mark">?</span>, |
| )) |
| } |
| <span class="kw">fn </span>open_random_access_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>RandomAccess>> { |
| <span class="prelude-val">Ok</span>(sgx_tprotected_fs::OpenOptions::default() |
| .read(<span class="bool-val">true</span>) |
| .open_with_key(p, <span class="self">self</span>.key) |
| .map(|f| { |
| <span class="kw">let </span>b: Box<<span class="kw">dyn </span>RandomAccess> = Box::new(f); |
| b |
| }) |
| .map_err(|e| map_err_with_name(<span class="string">"open_sgx (randomaccess)"</span>, p, e))<span class="question-mark">?</span>) |
| } |
| <span class="kw">fn </span>open_writable_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>Write>> { |
| <span class="prelude-val">Ok</span>(Box::new( |
| sgx_tprotected_fs::OpenOptions::default() |
| .write(<span class="bool-val">true</span>) |
| .append(<span class="bool-val">false</span>) |
| .open_with_key(p, <span class="self">self</span>.key) |
| .map_err(|e| map_err_with_name(<span class="string">"open_sgx (write)"</span>, p, e))<span class="question-mark">?</span>, |
| )) |
| } |
| <span class="kw">fn </span>open_appendable_file(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Box<<span class="kw">dyn </span>Write>> { |
| <span class="prelude-val">Ok</span>(Box::new( |
| sgx_tprotected_fs::OpenOptions::default() |
| .append(<span class="bool-val">true</span>) |
| .open_with_key(p, <span class="self">self</span>.key) |
| .map_err(|e| map_err_with_name(<span class="string">"open_sgx (append_sgx)"</span>, p, e))<span class="question-mark">?</span>, |
| )) |
| } |
| <span class="kw">fn </span>exists(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><bool> { |
| <span class="prelude-val">Ok</span>(p.exists()) |
| } |
| <span class="kw">fn </span>children(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Vec<PathBuf>> { |
| <span class="kw">let </span>dir_reader = fs::read_dir(p).map_err(|e| map_err_with_name(<span class="string">"children"</span>, p, e))<span class="question-mark">?</span>; |
| <span class="kw">let </span>filenames = dir_reader |
| .map(|r| { |
| <span class="kw">if </span>!r.is_ok() { |
| Path::new(<span class="string">""</span>).to_owned() |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>direntry = r.unwrap(); |
| Path::new(<span class="kw-2">&</span>direntry.file_name()).to_owned() |
| } |
| }) |
| .filter(|s| !s.as_os_str().is_empty()); |
| <span class="prelude-val">Ok</span>(Vec::from_iter(filenames)) |
| } |
| |
| <span class="kw">fn </span>size_of(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span><span class="kw-2">mut </span>f = sgx_tprotected_fs::OpenOptions::default() |
| .read(<span class="bool-val">true</span>) |
| .open_with_key(p, <span class="self">self</span>.key) |
| .map_err(|e| map_err_with_name(<span class="string">"size_of (open)"</span>, p, e))<span class="question-mark">?</span>; |
| <span class="kw">let </span>size = f.seek(SeekFrom::End(<span class="number">0</span>))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(size <span class="kw">as </span>usize) |
| } |
| |
| <span class="kw">fn </span>delete(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()> { |
| <span class="prelude-val">Ok</span>(fs::remove_file(p).map_err(|e| map_err_with_name(<span class="string">"delete"</span>, p, e))<span class="question-mark">?</span>) |
| } |
| <span class="kw">fn </span>mkdir(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()> { |
| <span class="prelude-val">Ok</span>(fs::create_dir_all(p).map_err(|e| map_err_with_name(<span class="string">"mkdir"</span>, p, e))<span class="question-mark">?</span>) |
| } |
| <span class="kw">fn </span>rmdir(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()> { |
| <span class="prelude-val">Ok</span>(fs::remove_dir_all(p).map_err(|e| map_err_with_name(<span class="string">"rmdir"</span>, p, e))<span class="question-mark">?</span>) |
| } |
| <span class="kw">fn </span>rename(<span class="kw-2">&</span><span class="self">self</span>, old: <span class="kw-2">&</span>Path, new: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span>old_name = old |
| .file_name() |
| .map(|f| f.to_str()) |
| .flatten() |
| .ok_or(map_err_with_name( |
| <span class="string">"rename1"</span>, |
| old, |
| io::Error::from_raw_os_error(<span class="number">21</span>), |
| ))<span class="question-mark">?</span>; |
| <span class="kw">let </span>new_name = new |
| .file_name() |
| .map(|f| f.to_str()) |
| .flatten() |
| .ok_or(map_err_with_name( |
| <span class="string">"rename2"</span>, |
| old, |
| io::Error::from_raw_os_error(<span class="number">21</span>), |
| ))<span class="question-mark">?</span>; |
| |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>f = sgx_tprotected_fs::OpenOptions::default() |
| .append(<span class="bool-val">true</span>) |
| .open_with_key(old, <span class="self">self</span>.key) |
| .map_err(|e| map_err_with_name(<span class="string">"rename (open)"</span>, old, e))<span class="question-mark">?</span>; |
| f.rename(old_name, new_name)<span class="question-mark">?</span>; |
| } |
| |
| <span class="prelude-val">Ok</span>(fs::rename(old, new).map_err(|e| map_err_with_name(<span class="string">"rename"</span>, old, e))<span class="question-mark">?</span>) |
| } |
| |
| <span class="kw">fn </span>lock(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><FileLock> { |
| <span class="kw">let </span><span class="kw-2">mut </span>locks = <span class="self">self</span>.locks.lock().unwrap(); |
| |
| <span class="kw">if </span>locks.contains_key(<span class="kw-2">&</span>p.to_str().unwrap().to_string()) { |
| <span class="prelude-val">Err</span>(Status::new(StatusCode::AlreadyExists, <span class="string">"Lock is held"</span>)) |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>f = sgx_tprotected_fs::OpenOptions::default() |
| .write(<span class="bool-val">true</span>) |
| .append(<span class="bool-val">false</span>) |
| .open_with_key(p, <span class="self">self</span>.key) |
| .map_err(|e| map_err_with_name(<span class="string">"lock_sgx: "</span>, p, e))<span class="question-mark">?</span>; |
| |
| locks.insert(p.to_str().unwrap().to_string(), f); |
| <span class="kw">let </span>lock = FileLock { |
| id: p.to_str().unwrap().to_string(), |
| }; |
| <span class="prelude-val">Ok</span>(lock) |
| } |
| } |
| <span class="kw">fn </span>unlock(<span class="kw-2">&</span><span class="self">self</span>, l: FileLock) -> <span class="prelude-ty">Result</span><()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>locks = <span class="self">self</span>.locks.lock().unwrap(); |
| <span class="kw">if </span>!locks.contains_key(<span class="kw-2">&</span>l.id) { |
| <span class="kw">return </span>err( |
| StatusCode::LockError, |
| <span class="kw-2">&</span><span class="macro">format!</span>(<span class="string">"unlocking a file that is not locked: {}"</span>, l.id), |
| ); |
| } <span class="kw">else </span>{ |
| locks.remove(<span class="kw-2">&</span>l.id).unwrap(); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">fn </span>new_logger(<span class="kw-2">&</span><span class="self">self</span>, p: <span class="kw-2">&</span>Path) -> <span class="prelude-ty">Result</span><Logger> { |
| <span class="self">self</span>.open_appendable_file(p) |
| .map(|dst| Logger::new(Box::new(dst))) |
| } |
| |
| <span class="kw">fn </span>micros(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| micros() |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"enclave_unit_test"</span>)] |
| </span><span class="kw">pub mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span>std::convert::AsRef; |
| <span class="kw">use </span>std::io::Write; |
| <span class="kw">use </span>std::iter::FromIterator; |
| <span class="kw">use </span>teaclave_test_utils::<span class="kw-2">*</span>; |
| |
| <span class="kw">pub fn </span>run_tests() -> bool { |
| <span class="macro">run_tests!</span>(test_files, test_locking, test_dirs,) |
| } |
| |
| <span class="kw">fn </span>test_files() { |
| <span class="kw">let </span>n = <span class="string">"testfile.xyz"</span>.to_string(); |
| <span class="kw">let </span>name = n.as_ref(); |
| <span class="kw">let </span>env = PosixDiskEnv::new_with([<span class="number">0u8</span>; <span class="number">16</span>]); |
| |
| <span class="comment">// exists, size_of, delete |
| </span><span class="macro">assert!</span>(env.open_appendable_file(name).is_ok()); |
| <span class="macro">assert!</span>(env.exists(name).unwrap_or(<span class="bool-val">false</span>)); |
| <span class="macro">assert_eq!</span>(env.size_of(name).unwrap_or(<span class="number">1</span>), <span class="number">0</span>); |
| <span class="macro">assert!</span>(env.delete(name).is_ok()); |
| |
| <span class="macro">assert!</span>(env.open_writable_file(name).is_ok()); |
| <span class="macro">assert!</span>(env.exists(name).unwrap_or(<span class="bool-val">false</span>)); |
| <span class="macro">assert_eq!</span>(env.size_of(name).unwrap_or(<span class="number">1</span>), <span class="number">0</span>); |
| <span class="macro">assert!</span>(env.delete(name).is_ok()); |
| |
| { |
| { |
| <span class="comment">// write |
| </span><span class="kw">let </span><span class="kw-2">mut </span>f = env.open_writable_file(name).unwrap(); |
| <span class="kw">let _ </span>= f.write(<span class="string">"123xyz"</span>.as_bytes()); |
| } |
| <span class="macro">assert_eq!</span>(<span class="number">6</span>, env.size_of(name).unwrap_or(<span class="number">0</span>)); |
| |
| <span class="comment">// rename |
| </span><span class="kw">let </span>newname = Path::new(<span class="string">"testfile2.xyz"</span>); |
| <span class="macro">assert!</span>(env.rename(name, newname).is_ok()); |
| <span class="macro">assert_eq!</span>(<span class="bool-val">false</span>, env.size_of(newname).is_err()); |
| <span class="macro">assert!</span>(!env.exists(name).unwrap()); |
| <span class="comment">// rename back so that the remaining tests can use the file. |
| </span><span class="macro">assert!</span>(env.rename(newname, name).is_ok()); |
| } |
| |
| <span class="macro">assert!</span>(env.open_sequential_file(name).is_ok()); |
| <span class="macro">assert!</span>(env.open_random_access_file(name).is_ok()); |
| |
| <span class="macro">assert!</span>(env.delete(name).is_ok()); |
| } |
| |
| <span class="kw">fn </span>test_locking() { |
| <span class="kw">let </span>env = PosixDiskEnv::new_with([<span class="number">0u8</span>; <span class="number">16</span>]); |
| <span class="kw">let </span>n = <span class="string">"acquire_lock.123"</span>.to_string(); |
| <span class="kw">let </span>name = n.as_ref(); |
| |
| { |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>f = env.open_writable_file(name).unwrap(); |
| <span class="kw">let _ </span>= f.write(<span class="string">"123xyz"</span>.as_bytes()); |
| } |
| <span class="macro">assert_eq!</span>(env.size_of(name).unwrap_or(<span class="number">0</span>), <span class="number">6</span>); |
| } |
| |
| { |
| <span class="kw">let </span>r = env.lock(name); |
| <span class="macro">assert!</span>(r.is_ok()); |
| env.unlock(r.unwrap()).unwrap(); |
| } |
| |
| { |
| <span class="kw">let </span>r = env.lock(name); |
| <span class="macro">assert!</span>(r.is_ok()); |
| <span class="kw">let </span>s = env.lock(name); |
| <span class="macro">assert!</span>(s.is_err()); |
| env.unlock(r.unwrap()).unwrap(); |
| } |
| |
| <span class="macro">assert!</span>(env.delete(name).is_ok()); |
| } |
| |
| <span class="kw">fn </span>test_dirs() { |
| <span class="kw">let </span>d = <span class="string">"subdir/"</span>; |
| <span class="kw">let </span>dirname = d.as_ref(); |
| <span class="kw">let </span>env = PosixDiskEnv::new_with([<span class="number">0u8</span>; <span class="number">16</span>]); |
| |
| <span class="macro">assert!</span>(env.mkdir(dirname).is_ok()); |
| <span class="macro">assert!</span>(env |
| .open_writable_file( |
| String::from_iter(<span class="macro">vec!</span>[d.to_string(), <span class="string">"f1.txt"</span>.to_string()].into_iter()).as_ref() |
| ) |
| .is_ok()); |
| <span class="macro">assert_eq!</span>(env.children(dirname).unwrap().len(), <span class="number">1</span>); |
| <span class="macro">assert!</span>(env.rmdir(dirname).is_ok()); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="rusty_leveldb" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
