| <!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 `/root/sunhe/incubator-teaclave/third_party/rust-sgx-sdk/sgx_protected_fs/tfs/src/sys/file/node.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>node.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="../../../../sgx_tprotected_fs/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="../../../../sgx_tprotected_fs/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="comment">// Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License.. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::sys::error::FsResult; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::file::{FileInner, FileStatus}; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::metadata::MD_USER_DATA_SIZE; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::node::{FileNode, FileNodeRef, NodeType}; |
| <span class="kw">use </span><span class="kw">crate</span>::sys::node::{ATTACHED_DATA_NODES_COUNT, CHILD_MHT_NODES_COUNT, NODE_SIZE}; |
| <span class="kw">use </span>sgx_types::error::SgxStatus; |
| |
| <span class="kw">impl </span>FileInner { |
| <span class="kw">pub fn </span>get_data_node(<span class="kw-2">&mut </span><span class="self">self</span>) -> FsResult<FileNodeRef> { |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.offset >= MD_USER_DATA_SIZE, |
| <span class="macro">esgx!</span>(SgxStatus::Unexpected) |
| ); |
| |
| <span class="kw">let </span>data_node = <span class="kw">if </span>((<span class="self">self</span>.offset - MD_USER_DATA_SIZE) % NODE_SIZE == <span class="number">0</span>) |
| && (<span class="self">self</span>.offset == <span class="self">self</span>.metadata.encrypted_plain.size) |
| { |
| <span class="self">self</span>.append_data_node() |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.read_data_node() |
| }; |
| |
| <span class="comment">// bump all the parents mht to reside before the data node in the cache |
| </span><span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">ref </span>data_node) = data_node { |
| <span class="self">self</span>.bump_mht_node(data_node); |
| } |
| |
| <span class="comment">// even if we didn't get the required data_node, we might have read other nodes in the process |
| </span><span class="self">self</span>.shrink_cache()<span class="question-mark">?</span>; |
| data_node |
| } |
| |
| <span class="kw">fn </span>get_mht_node(<span class="kw-2">&mut </span><span class="self">self</span>) -> FsResult<FileNodeRef> { |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.offset >= MD_USER_DATA_SIZE, |
| <span class="macro">esgx!</span>(SgxStatus::Unexpected) |
| ); |
| |
| <span class="kw">let </span>(logic_number, <span class="kw">_</span>) = <span class="self">self</span>.get_mht_node_numbers(); |
| <span class="kw">if </span>logic_number == <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="self">self</span>.root_mht.clone()); |
| } |
| |
| <span class="kw">if </span>((<span class="self">self</span>.offset - MD_USER_DATA_SIZE) % (ATTACHED_DATA_NODES_COUNT <span class="kw">as </span>usize * NODE_SIZE) |
| == <span class="number">0</span>) |
| && <span class="self">self</span>.offset == <span class="self">self</span>.metadata.encrypted_plain.size |
| { |
| <span class="self">self</span>.append_mht_node(logic_number) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.read_mht_node(logic_number) |
| } |
| } |
| |
| <span class="kw">fn </span>append_mht_node(<span class="kw-2">&mut </span><span class="self">self</span>, logic_number: u64) -> FsResult<FileNodeRef> { |
| <span class="kw">let </span>parent_mht_node = <span class="self">self</span>.read_mht_node((logic_number - <span class="number">1</span>) / CHILD_MHT_NODES_COUNT)<span class="question-mark">?</span>; |
| |
| <span class="comment">// the '1' is for the meta data node |
| // ATTACHED_DATA_NODES_COUNT + 1 (the '1' is for the mht node preceding every 96 data nodes) |
| </span><span class="kw">let </span>physical_number = <span class="number">1 </span>+ logic_number * (ATTACHED_DATA_NODES_COUNT + <span class="number">1</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>mht_node = FileNode::new( |
| NodeType::Mht, |
| logic_number, |
| physical_number, |
| <span class="self">self</span>.metadata.encrypt_flags(), |
| ); |
| mht_node.parent = <span class="prelude-val">Some</span>(parent_mht_node); |
| |
| <span class="kw">let </span>mht_node = FileNode::build_ref(mht_node); |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.cache.push(physical_number, mht_node.clone()), |
| <span class="macro">esgx!</span>(SgxStatus::Unexpected) |
| ); |
| <span class="prelude-val">Ok</span>(mht_node) |
| } |
| |
| <span class="kw">fn </span>read_mht_node(<span class="kw-2">&mut </span><span class="self">self</span>, logic_number: u64) -> FsResult<FileNodeRef> { |
| <span class="kw">if </span>logic_number == <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="self">self</span>.root_mht.clone()); |
| } |
| <span class="comment">// the '1' is for the meta data node |
| // ATTACHED_DATA_NODES_COUNT + 1 (the '1' is for the mht node preceding every 96 data nodes) |
| </span><span class="kw">let </span>physical_number = <span class="number">1 </span>+ logic_number * (ATTACHED_DATA_NODES_COUNT + <span class="number">1</span>); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(mht_node) = <span class="self">self</span>.cache.find(physical_number) { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(mht_node); |
| } |
| |
| <span class="kw">let </span>parent_mht_node = <span class="self">self</span>.read_mht_node((logic_number - <span class="number">1</span>) / CHILD_MHT_NODES_COUNT)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>mht_node = FileNode::new( |
| NodeType::Mht, |
| logic_number, |
| physical_number, |
| <span class="self">self</span>.metadata.encrypt_flags(), |
| ); |
| mht_node.parent = <span class="prelude-val">Some</span>(parent_mht_node); |
| |
| mht_node.read_from_disk(<span class="kw-2">&mut </span><span class="self">self</span>.host_file)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>gcm_data = mht_node.get_gcm_data().ok_or(SgxStatus::Unexpected)<span class="question-mark">?</span>; |
| mht_node.decrypt(<span class="kw-2">&</span>gcm_data.key, <span class="kw-2">&</span>gcm_data.mac)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>mht_node = FileNode::build_ref(mht_node); |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.cache.push(physical_number, mht_node.clone()), |
| <span class="macro">esgx!</span>(SgxStatus::Unexpected) |
| ); |
| <span class="prelude-val">Ok</span>(mht_node) |
| } |
| |
| <span class="kw">fn </span>append_data_node(<span class="kw-2">&mut </span><span class="self">self</span>) -> FsResult<FileNodeRef> { |
| <span class="kw">let </span>mht_node = <span class="self">self</span>.get_mht_node()<span class="question-mark">?</span>; |
| <span class="kw">let </span>(logic_number, physical_number) = <span class="self">self</span>.get_data_node_numbers(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>data_node = FileNode::new( |
| NodeType::Data, |
| logic_number, |
| physical_number, |
| <span class="self">self</span>.metadata.encrypt_flags(), |
| ); |
| data_node.parent = <span class="prelude-val">Some</span>(mht_node); |
| |
| <span class="kw">let </span>data_node = FileNode::build_ref(data_node); |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.cache.push(physical_number, data_node.clone()), |
| <span class="macro">esgx!</span>(SgxStatus::Unexpected) |
| ); |
| <span class="prelude-val">Ok</span>(data_node) |
| } |
| |
| <span class="kw">fn </span>read_data_node(<span class="kw-2">&mut </span><span class="self">self</span>) -> FsResult<FileNodeRef> { |
| <span class="kw">let </span>(logic_number, physical_number) = <span class="self">self</span>.get_data_node_numbers(); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(data_node) = <span class="self">self</span>.cache.find(physical_number) { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(data_node); |
| } |
| |
| <span class="kw">let </span>mht_node = <span class="self">self</span>.get_mht_node()<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>data_node = FileNode::new( |
| NodeType::Data, |
| logic_number, |
| physical_number, |
| <span class="self">self</span>.metadata.encrypt_flags(), |
| ); |
| data_node.parent = <span class="prelude-val">Some</span>(mht_node); |
| |
| data_node.read_from_disk(<span class="kw-2">&mut </span><span class="self">self</span>.host_file)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>gcm_data = data_node.get_gcm_data().ok_or(SgxStatus::Unexpected)<span class="question-mark">?</span>; |
| data_node.decrypt(<span class="kw-2">&</span>gcm_data.key, <span class="kw-2">&</span>gcm_data.mac)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>data_node = FileNode::build_ref(data_node); |
| <span class="macro">ensure!</span>( |
| <span class="self">self</span>.cache.push(physical_number, data_node.clone()), |
| <span class="macro">esgx!</span>(SgxStatus::Unexpected) |
| ); |
| <span class="prelude-val">Ok</span>(data_node) |
| } |
| |
| <span class="kw">fn </span>bump_mht_node(<span class="kw-2">&mut </span><span class="self">self</span>, node: <span class="kw-2">&</span>FileNodeRef) { |
| <span class="kw">let </span><span class="kw-2">mut </span>parent = node.borrow().parent.clone(); |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(mht) = parent { |
| <span class="kw">let </span>mht = mht.borrow(); |
| <span class="kw">if </span>!mht.is_root_mht() { |
| <span class="self">self</span>.cache.move_to_head(mht.ciphertext.physical_number); |
| parent = mht.parent.clone(); |
| } <span class="kw">else </span>{ |
| <span class="kw">break</span>; |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>shrink_cache(<span class="kw-2">&mut </span><span class="self">self</span>) -> FsResult { |
| <span class="kw">while </span><span class="self">self</span>.cache.len() > <span class="self">self</span>.max_cache_page { |
| <span class="kw">let </span>node = <span class="self">self</span>.cache.back().ok_or(SgxStatus::Unexpected)<span class="question-mark">?</span>; |
| <span class="kw">if </span>!node.borrow().need_writing { |
| <span class="kw">let </span>_node = <span class="self">self</span>.cache.pop_back(); |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.internal_flush(<span class="bool-val">false</span>).map_err(|error| { |
| <span class="kw">if </span><span class="self">self</span>.status.is_ok() { |
| <span class="self">self</span>.set_file_status(FileStatus::FlushError); |
| } |
| error |
| })<span class="question-mark">?</span>; |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>get_node_numbers(<span class="kw-2">&</span><span class="self">self</span>) -> (u64, u64, u64, u64) { |
| <span class="kw">if </span><span class="self">self</span>.offset < MD_USER_DATA_SIZE { |
| <span class="kw">return </span>(<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>); |
| } |
| |
| <span class="comment">// node 0 - meta data node |
| // node 1 - mht |
| // nodes 2-97 - data (ATTACHED_DATA_NODES_COUNT == 96) |
| // node 98 - mht |
| // node 99-195 - data |
| // etc. |
| </span><span class="kw">let </span>data_logic_number = ((<span class="self">self</span>.offset - MD_USER_DATA_SIZE) / NODE_SIZE) <span class="kw">as </span>u64; |
| <span class="kw">let </span>mht_logic_number = data_logic_number / ATTACHED_DATA_NODES_COUNT; |
| |
| <span class="comment">// + 1 - meta data node |
| // + 1 - mht root |
| // + mht_logic_number - number of mht nodes in the middle (the root mht mht_node_number is 0) |
| </span><span class="kw">let </span>data_physical_number = data_logic_number + <span class="number">1 </span>+ <span class="number">1 </span>+ mht_logic_number; |
| |
| <span class="kw">let </span>mht_physical_number = |
| data_physical_number - data_logic_number % ATTACHED_DATA_NODES_COUNT - <span class="number">1</span>; |
| |
| ( |
| mht_logic_number, |
| data_logic_number, |
| mht_physical_number, |
| data_physical_number, |
| ) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>get_data_node_numbers(<span class="kw-2">&</span><span class="self">self</span>) -> (u64, u64) { |
| <span class="kw">let </span>(<span class="kw">_</span>, logic, <span class="kw">_</span>, physical) = <span class="self">self</span>.get_node_numbers(); |
| (logic, physical) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>get_mht_node_numbers(<span class="kw-2">&</span><span class="self">self</span>) -> (u64, u64) { |
| <span class="kw">let </span>(logic, <span class="kw">_</span>, physical, <span class="kw">_</span>) = <span class="self">self</span>.get_node_numbers(); |
| (logic, physical) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="sgx_tprotected_fs" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
