mirror of
https://github.com/matrix-construct/construct
synced 2024-11-18 07:50:57 +01:00
1424 lines
26 KiB
C++
1424 lines
26 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include <RB_INC_SYS_STAT_H
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#include <boost/filesystem.hpp>
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#include <ircd/asio.h>
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#ifdef IRCD_USE_AIO
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#include "aio.h"
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#endif
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namespace filesystem = boost::filesystem;
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namespace ircd::fs
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{
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filesystem::path path(std::string);
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filesystem::path path(const string_view &);
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filesystem::path path(const vector_view<const string_view> &);
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}
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//
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// init
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//
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ircd::fs::init::init()
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{
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}
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ircd::fs::init::~init()
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noexcept
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{
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}
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//
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// Compile-time path index
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//
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namespace ircd::fs
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{
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struct sysent;
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extern const std::array<struct sysent, num_of<index>()> syspaths;
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}
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struct ircd::fs::sysent
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{
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string_view name;
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string_view path;
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};
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decltype(ircd::fs::syspaths)
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ircd::fs::syspaths
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{{
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{ "installation prefix", RB_PREFIX },
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{ "binary directory", RB_BIN_DIR },
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{ "configuration directory", RB_CONF_DIR },
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{ "data directory", RB_DATA_DIR },
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{ "database directory", RB_DB_DIR },
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{ "log directory", RB_LOG_DIR },
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{ "module directory", RB_MODULE_DIR },
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}};
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ircd::string_view
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ircd::fs::get(index index)
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noexcept try
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{
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return syspaths.at(index).path;
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}
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catch(const std::out_of_range &e)
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{
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return {};
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}
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ircd::string_view
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ircd::fs::name(index index)
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noexcept try
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{
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return syspaths.at(index).name;
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}
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catch(const std::out_of_range &e)
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{
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return {};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs.h / misc
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//
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std::string
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ircd::fs::cwd()
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try
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{
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return filesystem::current_path().string();
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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void
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ircd::fs::chdir(const string_view &path)
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try
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{
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filesystem::current_path(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::mkdir(const string_view &path)
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try
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{
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return filesystem::create_directories(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::remove(const string_view &path)
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try
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{
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return filesystem::remove(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::remove(std::nothrow_t,
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const string_view &path)
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{
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boost::system::error_code ec;
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return filesystem::remove(fs::path(path), ec);
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}
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void
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ircd::fs::rename(const string_view &old,
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const string_view &new_)
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try
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{
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filesystem::rename(path(old), path(new_));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::rename(std::nothrow_t,
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const string_view &old,
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const string_view &new_)
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{
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boost::system::error_code ec;
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filesystem::rename(path(old), path(new_), ec);
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return !ec;
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}
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std::vector<std::string>
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ircd::fs::ls_recursive(const string_view &path)
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try
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{
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const filesystem::recursive_directory_iterator end;
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filesystem::recursive_directory_iterator it
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{
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fs::path(path)
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};
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std::vector<std::string> ret;
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std::transform(it, end, std::back_inserter(ret), []
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(const auto &ent)
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{
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return ent.path().string();
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});
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return ret;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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std::vector<std::string>
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ircd::fs::ls(const string_view &path)
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try
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{
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static const filesystem::directory_iterator end;
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filesystem::directory_iterator it
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{
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fs::path(path)
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};
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std::vector<std::string> ret;
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std::transform(it, end, std::back_inserter(ret), []
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(const auto &ent)
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{
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return ent.path().string();
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});
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return ret;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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size_t
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ircd::fs::size(const string_view &path)
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try
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{
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return filesystem::file_size(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::is_reg(const string_view &path)
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try
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{
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return filesystem::is_regular_file(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::is_dir(const string_view &path)
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try
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{
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return filesystem::is_directory(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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bool
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ircd::fs::exists(const string_view &path)
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try
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{
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return filesystem::exists(fs::path(path));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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std::string
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ircd::fs::make_path(const vector_view<const std::string> &list)
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try
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{
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filesystem::path ret;
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for(const auto &s : list)
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ret /= path(s);
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return ret.string();
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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std::string
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ircd::fs::make_path(const vector_view<const string_view> &list)
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try
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{
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filesystem::path ret;
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for(const auto &s : list)
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ret /= path(s);
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return ret.string();
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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filesystem::path
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ircd::fs::path(const vector_view<const string_view> &list)
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try
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{
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filesystem::path ret;
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for(const auto &s : list)
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ret /= path(s);
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return ret.string();
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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filesystem::path
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ircd::fs::path(const string_view &s)
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try
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{
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return path(std::string{s});
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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filesystem::path
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ircd::fs::path(std::string s)
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try
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{
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return filesystem::path(std::move(s));
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/support.h
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//
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bool
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ircd::fs::support::fallocate(const string_view &path,
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const write_opts &wopts)
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try
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{
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const fd::opts opts
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{
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std::ios::out
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};
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fs::fd fd
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{
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path, opts
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};
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fs::allocate(fd, info::page_size, wopts);
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return true;
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}
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catch(const std::system_error &e)
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{
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const auto &ec(e.code());
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if(system_category(ec)) switch(ec.value())
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{
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case int(std::errc::invalid_argument):
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case int(std::errc::operation_not_supported):
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return false;
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default:
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break;
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}
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throw;
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}
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bool
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ircd::fs::support::direct_io(const string_view &path)
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try
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{
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fd::opts opts{std::ios::out};
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opts.direct = true;
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fd{path, opts};
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return true;
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}
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catch(const std::system_error &e)
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{
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const auto &ec(e.code());
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if(system_category(ec)) switch(ec.value())
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{
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case int(std::errc::invalid_argument):
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return false;
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default:
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break;
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}
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throw;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/stdin.h
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//
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ircd::string_view
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ircd::fs::stdin::readline(const mutable_buffer &buf)
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try
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{
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boost::asio::posix::stream_descriptor fd
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{
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ios::get(), dup(STDIN_FILENO)
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};
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boost::asio::streambuf sb
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{
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size(buf)
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};
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const auto interruption{[&fd]
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(ctx::ctx *const &interruptor)
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{
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fd.cancel();
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}};
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size_t len; continuation
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{
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continuation::asio_predicate, interruption, [&len, &fd, &sb]
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(auto &yield)
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{
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len = boost::asio::async_read_until(fd, sb, '\n', yield);
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}
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};
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std::istream is{&sb};
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is.get(data(buf), size(buf), '\n');
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return string_view
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{
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data(buf), size_t(is.gcount())
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};
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}
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catch(boost::system::system_error &e)
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{
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throw_system_error(e);
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__builtin_unreachable();
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}
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//
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// tty
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//
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ircd::fs::stdin::tty::tty()
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:fd{[]
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{
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thread_local char buf[256];
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syscall(::ttyname_r, STDIN_FILENO, buf, sizeof(buf));
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return fd
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{
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string_view{buf}, std::ios_base::out
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};
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}()}
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{
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}
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size_t
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ircd::fs::stdin::tty::write(const string_view &buf)
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{
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return syscall(::write, int(*this), buf.data(), buf.size());
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/sync.h
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//
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ircd::fs::sync_opts
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const ircd::fs::sync_opts_default;
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void
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ircd::fs::sync(const fd &fd,
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const off_t &offset,
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const size_t &length,
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const sync_opts &opts)
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{
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return sync(fd, opts);
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}
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void
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ircd::fs::sync(const fd &fd,
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const sync_opts &opts)
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{
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const ctx::slice_usage_warning message
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{
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"fs::sync(fd:%d)", int(fd)
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};
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#ifdef __linux__
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syscall(::syncfs, fd);
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#else
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syscall(::sync);
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#endif
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}
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void
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ircd::fs::flush(const fd &fd,
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const off_t &offset,
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const size_t &length,
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const sync_opts &opts)
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{
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return flush(fd, opts);
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}
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void
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ircd::fs::flush(const fd &fd,
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const sync_opts &opts)
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{
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const ctx::slice_usage_warning message
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{
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"fs::flush(fd:%d, {metadata:%b aio:%b:%b})",
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int(fd),
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opts.metadata,
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opts.aio,
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opts.metadata? aio::SUPPORT_FDSYNC : aio::SUPPORT_FSYNC
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};
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#ifdef IRCD_USE_AIO
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if(aio::context && opts.aio)
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{
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if(!opts.metadata && aio::SUPPORT_FDSYNC)
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return aio::fdsync(fd, opts);
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if(aio::SUPPORT_FSYNC)
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return aio::fsync(fd, opts);
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}
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#endif
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if(!opts.metadata)
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return void(syscall(::fdatasync, fd));
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return void(syscall(::fsync, fd));
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/prefetch.h
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/read.h
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//
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namespace ircd::fs
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{
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static size_t read(const fd &, const const_iovec_view &, const read_opts &);
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}
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|
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ircd::fs::read_opts
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const ircd::fs::read_opts_default
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{};
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|
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#ifdef __linux__
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void
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ircd::fs::prefetch(const fd &fd,
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const size_t &count,
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const read_opts &opts)
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{
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const auto flags
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|
{
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syscall(::fcntl, fd, F_GETFL)
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};
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|
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if(~flags & O_DIRECT)
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{
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syscall(::readahead, fd, opts.offset, count);
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return;
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}
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|
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#ifdef IRCD_USE_AIO
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if(likely(aio::context) && opts.aio)
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aio::prefetch(fd, count, opts);
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#endif
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}
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#else
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void
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ircd::fs::prefetch(const fd &fd,
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const size_t &count,
|
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const read_opts &opts)
|
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{
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}
|
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#endif
|
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|
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std::string
|
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ircd::fs::read(const string_view &path,
|
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const read_opts &opts)
|
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{
|
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const fd fd
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{
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path
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};
|
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return read(fd, opts);
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}
|
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|
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std::string
|
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ircd::fs::read(const fd &fd,
|
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const read_opts &opts)
|
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{
|
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return string(size(fd), [&fd, &opts]
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(const mutable_buffer &buf)
|
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{
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return read(fd, buf, opts);
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});
|
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}
|
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|
|
ircd::const_buffer
|
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ircd::fs::read(const string_view &path,
|
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const mutable_buffer &buf,
|
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const read_opts &opts)
|
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{
|
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const mutable_buffers bufs
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{
|
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&buf, 1
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};
|
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|
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return mutable_buffer
|
|
{
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data(buf), read(path, bufs, opts)
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};
|
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}
|
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|
|
ircd::const_buffer
|
|
ircd::fs::read(const fd &fd,
|
|
const mutable_buffer &buf,
|
|
const read_opts &opts)
|
|
{
|
|
const mutable_buffers bufs
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|
{
|
|
&buf, 1
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|
};
|
|
|
|
return mutable_buffer
|
|
{
|
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data(buf), read(fd, bufs, opts)
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};
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::read(const string_view &path,
|
|
const mutable_buffers &bufs,
|
|
const read_opts &opts)
|
|
{
|
|
const fd fd
|
|
{
|
|
path
|
|
};
|
|
|
|
return read(fd, bufs, opts);
|
|
}
|
|
|
|
/// Read from file descriptor fd into buffers. The number of bytes read into
|
|
/// the buffers is returned. By default (via read_opts.all) this call will
|
|
/// loop internally until the buffers are full or EOF. To allow for a partial
|
|
/// read(), disable read_opts.all. Note that to maintain alignments (i.e when
|
|
/// direct-io or for special files read_opts.all must be false). By default
|
|
/// (via read_opts.interruptible) this call can throw if the syscall was
|
|
/// interrupted before reading any bytes.
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wstack-usage="
|
|
size_t
|
|
__attribute__((stack_protect))
|
|
ircd::fs::read(const fd &fd,
|
|
const mutable_buffers &bufs,
|
|
const read_opts &opts_)
|
|
{
|
|
if(unlikely(bufs.size() > info::iov_max))
|
|
throw error
|
|
{
|
|
make_error_code(std::errc::invalid_argument),
|
|
"Buffer count of %zu exceeds IOV_MAX of %zu",
|
|
bufs.size(),
|
|
info::iov_max
|
|
};
|
|
|
|
size_t ret(0);
|
|
read_opts opts(opts_);
|
|
assert(bufs.size() <= info::iov_max);
|
|
struct ::iovec iovbuf[bufs.size()]; do
|
|
{
|
|
assert(opts.offset >= opts_.offset);
|
|
const size_t off(opts.offset - opts_.offset);
|
|
assert(off <= buffers::size(bufs));
|
|
assert(ret <= buffers::size(bufs));
|
|
const auto iov
|
|
{
|
|
make_iov({iovbuf, bufs.size()}, bufs, ret)
|
|
};
|
|
|
|
ret += read(fd, iov, opts);
|
|
if(!opts_.all)
|
|
break;
|
|
|
|
if(off >= ret)
|
|
break;
|
|
|
|
opts.offset = opts_.offset + ret;
|
|
}
|
|
while(ret < buffers::size(bufs));
|
|
assert(opts.offset >= opts_.offset);
|
|
assert(ret <= buffers::size(bufs));
|
|
return ret;
|
|
}
|
|
#pragma GCC diagnostic pop
|
|
|
|
/// Lowest-level read() call. This call only conducts a single operation
|
|
/// (no looping) and can return a partial read(). It does have branches
|
|
/// for various read_opts. The arguments involve `struct ::iovec` which
|
|
/// we do not expose to the ircd.h API; thus this function is internal to
|
|
/// ircd::fs. There is no reason to use this function in lieu of the public
|
|
/// fs::read() suite.
|
|
size_t
|
|
ircd::fs::read(const fd &fd,
|
|
const const_iovec_view &iov,
|
|
const read_opts &opts)
|
|
{
|
|
#ifdef IRCD_USE_AIO
|
|
if(aio::context && opts.aio)
|
|
return aio::read(fd, iov, opts);
|
|
#endif
|
|
|
|
const auto ret
|
|
{
|
|
opts.interruptible?
|
|
syscall(::preadv, fd, iov.data(), iov.size(), opts.offset):
|
|
syscall_nointr(::preadv, fd, iov.data(), iov.size(), opts.offset)
|
|
};
|
|
|
|
return size_t(ret);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// fs/write.h
|
|
//
|
|
|
|
namespace ircd::fs
|
|
{
|
|
static size_t write(const fd &, const const_iovec_view &, const write_opts &);
|
|
}
|
|
|
|
ircd::fs::write_opts
|
|
const ircd::fs::write_opts_default
|
|
{};
|
|
|
|
void
|
|
ircd::fs::allocate(const fd &fd,
|
|
const size_t &size,
|
|
const write_opts &opts)
|
|
{
|
|
int mode{0};
|
|
mode |= opts.keep_size? FALLOC_FL_KEEP_SIZE : 0;
|
|
syscall(::fallocate, fd, mode, opts.offset, size);
|
|
}
|
|
|
|
void
|
|
ircd::fs::truncate(const string_view &path,
|
|
const size_t &size,
|
|
const write_opts &opts)
|
|
{
|
|
const fd fd
|
|
{
|
|
path, std::ios::out | std::ios::trunc
|
|
};
|
|
|
|
return truncate(fd, size, opts);
|
|
}
|
|
|
|
void
|
|
ircd::fs::truncate(const fd &fd,
|
|
const size_t &size,
|
|
const write_opts &opts)
|
|
{
|
|
syscall(::ftruncate, fd, size);
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::fs::overwrite(const string_view &path,
|
|
const const_buffer &buf,
|
|
const write_opts &opts)
|
|
{
|
|
const const_buffers bufs
|
|
{
|
|
&buf, 1
|
|
};
|
|
|
|
return const_buffer
|
|
{
|
|
data(buf), overwrite(path, bufs, opts)
|
|
};
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::fs::overwrite(const fd &fd,
|
|
const const_buffer &buf,
|
|
const write_opts &opts)
|
|
{
|
|
const const_buffers bufs
|
|
{
|
|
&buf, 1
|
|
};
|
|
|
|
return const_buffer
|
|
{
|
|
data(buf), overwrite(fd, bufs, opts)
|
|
};
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::overwrite(const string_view &path,
|
|
const const_buffers &bufs,
|
|
const write_opts &opts)
|
|
{
|
|
const fd fd
|
|
{
|
|
path, std::ios::out | std::ios::trunc
|
|
};
|
|
|
|
return overwrite(fd, bufs, opts);
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::overwrite(const fd &fd,
|
|
const const_buffers &bufs,
|
|
const write_opts &opts)
|
|
{
|
|
return write(fd, bufs, opts);
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::fs::append(const string_view &path,
|
|
const const_buffer &buf,
|
|
const write_opts &opts)
|
|
{
|
|
const const_buffers bufs
|
|
{
|
|
&buf, 1
|
|
};
|
|
|
|
return const_buffer
|
|
{
|
|
data(buf), append(path, bufs, opts)
|
|
};
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::fs::append(const fd &fd,
|
|
const const_buffer &buf,
|
|
const write_opts &opts)
|
|
{
|
|
const const_buffers bufs
|
|
{
|
|
&buf, 1
|
|
};
|
|
|
|
return const_buffer
|
|
{
|
|
data(buf), append(fd, bufs, opts)
|
|
};
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::append(const string_view &path,
|
|
const const_buffers &bufs,
|
|
const write_opts &opts)
|
|
{
|
|
const fd fd
|
|
{
|
|
path, std::ios::out | std::ios::app
|
|
};
|
|
|
|
return append(fd, bufs, opts);
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::append(const fd &fd,
|
|
const const_buffers &bufs,
|
|
const write_opts &opts_)
|
|
{
|
|
auto opts(opts_);
|
|
if(!opts.offset)
|
|
opts.offset = syscall(::lseek, fd, 0, SEEK_END);
|
|
|
|
return write(fd, bufs, opts);
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::fs::write(const string_view &path,
|
|
const const_buffer &buf,
|
|
const write_opts &opts)
|
|
{
|
|
const const_buffers bufs
|
|
{
|
|
&buf, 1
|
|
};
|
|
|
|
return const_buffer
|
|
{
|
|
data(buf), write(path, bufs, opts)
|
|
};
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::fs::write(const fd &fd,
|
|
const const_buffer &buf,
|
|
const write_opts &opts)
|
|
{
|
|
const const_buffers bufs
|
|
{
|
|
&buf, 1
|
|
};
|
|
|
|
return const_buffer
|
|
{
|
|
data(buf), write(fd, bufs, opts)
|
|
};
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::write(const string_view &path,
|
|
const const_buffers &bufs,
|
|
const write_opts &opts)
|
|
{
|
|
const fd fd
|
|
{
|
|
path, std::ios::out
|
|
};
|
|
|
|
return write(fd, bufs, opts);
|
|
}
|
|
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wstack-usage="
|
|
size_t
|
|
__attribute__((stack_protect))
|
|
ircd::fs::write(const fd &fd,
|
|
const const_buffers &bufs,
|
|
const write_opts &opts_)
|
|
{
|
|
if(unlikely(bufs.size() > info::iov_max))
|
|
throw error
|
|
{
|
|
make_error_code(std::errc::invalid_argument),
|
|
"Buffer count of %zu exceeds IOV_MAX of %zu",
|
|
bufs.size(),
|
|
info::iov_max
|
|
};
|
|
|
|
write_opts opts(opts_);
|
|
size_t off(opts.offset - opts_.offset);
|
|
assert(bufs.size() <= info::iov_max);
|
|
struct ::iovec iovbuf[bufs.size()]; do
|
|
{
|
|
const auto iov
|
|
{
|
|
make_iov({iovbuf, bufs.size()}, bufs, off)
|
|
};
|
|
|
|
opts.offset += write(fd, iov, opts);
|
|
assert(opts.offset >= opts_.offset);
|
|
off = opts.offset - opts_.offset;
|
|
assert(off <= buffers::size(bufs));
|
|
}
|
|
while(opts.all && off < buffers::size(bufs));
|
|
assert(opts.offset >= opts_.offset);
|
|
assert(ssize_t(off) == opts.offset - opts_.offset);
|
|
assert(!opts.all || off == buffers::size(bufs));
|
|
return off;
|
|
}
|
|
#pragma GCC diagnostic pop
|
|
|
|
/// Lowest-level write() call. This call only conducts a single operation
|
|
/// (no looping) and can return early with a partial write(). It does have
|
|
/// branches for various write_opts. The arguments involve `struct ::iovec`
|
|
/// which we do not expose to the ircd.h API; thus this function is internal to
|
|
/// ircd::fs. There is no reason to use this function in lieu of the public
|
|
/// fs::read() suite.
|
|
size_t
|
|
ircd::fs::write(const fd &fd,
|
|
const const_iovec_view &iov,
|
|
const write_opts &opts)
|
|
{
|
|
#ifdef IRCD_USE_AIO
|
|
if(likely(aio::context) && opts.aio)
|
|
return aio::write(fd, iov, opts);
|
|
#endif
|
|
|
|
const auto ret
|
|
{
|
|
opts.interruptible?
|
|
syscall(::pwritev, fd, iov.data(), iov.size(), opts.offset):
|
|
syscall_nointr(::pwritev, fd, iov.data(), iov.size(), opts.offset)
|
|
};
|
|
|
|
return size_t(ret);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// fs/aio.h
|
|
//
|
|
|
|
//
|
|
// These symbols can be overriden by ircd/aio.cc if it is compiled and linked;
|
|
// otherwise on non-supporting platforms these will be the defaults here.
|
|
//
|
|
|
|
decltype(ircd::fs::aio::SUPPORT)
|
|
extern __attribute__((weak))
|
|
ircd::fs::aio::SUPPORT;
|
|
|
|
decltype(ircd::fs::aio::SUPPORT_FSYNC)
|
|
extern __attribute__((weak))
|
|
ircd::fs::aio::SUPPORT_FSYNC;
|
|
|
|
decltype(ircd::fs::aio::SUPPORT_FDSYNC)
|
|
extern __attribute__((weak))
|
|
ircd::fs::aio::SUPPORT_FDSYNC;
|
|
|
|
decltype(ircd::fs::aio::MAX_REQPRIO)
|
|
extern __attribute__((weak))
|
|
ircd::fs::aio::MAX_REQPRIO;
|
|
|
|
decltype(ircd::fs::aio::MAX_EVENTS)
|
|
extern __attribute__((weak))
|
|
ircd::fs::aio::MAX_EVENTS;
|
|
|
|
/// Conf item to control whether AIO is enabled or bypassed.
|
|
decltype(ircd::fs::aio::enable)
|
|
ircd::fs::aio::enable
|
|
{
|
|
{ "name", "ircd.fs.aio.enable" },
|
|
{ "default", true },
|
|
{ "persist", false },
|
|
};
|
|
|
|
decltype(ircd::fs::aio::max_events)
|
|
ircd::fs::aio::max_events
|
|
{
|
|
{ "name", "ircd.fs.aio.max_events" },
|
|
{ "default", long(aio::MAX_EVENTS) },
|
|
{ "persist", false },
|
|
};
|
|
|
|
decltype(ircd::fs::aio::max_submit)
|
|
ircd::fs::aio::max_submit
|
|
{
|
|
{ "name", "ircd.fs.aio.max_submit" },
|
|
{ "default", 32L },
|
|
{ "persist", false },
|
|
};
|
|
|
|
/// Global stats structure
|
|
decltype(ircd::fs::aio::stats)
|
|
ircd::fs::aio::stats;
|
|
|
|
/// Non-null when aio is available for use
|
|
decltype(ircd::fs::aio::context)
|
|
ircd::fs::aio::context;
|
|
|
|
//
|
|
// init
|
|
//
|
|
|
|
#ifndef IRCD_USE_AIO
|
|
ircd::fs::aio::init::init()
|
|
{
|
|
assert(!context);
|
|
log::warning
|
|
{
|
|
"No support for asynchronous local filesystem IO..."
|
|
};
|
|
}
|
|
#endif
|
|
|
|
#ifndef IRCD_USE_AIO
|
|
ircd::fs::aio::init::~init()
|
|
noexcept
|
|
{
|
|
assert(!context);
|
|
}
|
|
#endif
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// fs/fd.h
|
|
//
|
|
// TODO: x-platform
|
|
//
|
|
|
|
namespace ircd::fs
|
|
{
|
|
thread_local char path_buf[PATH_MAX];
|
|
static const char *path_str(const string_view &);
|
|
static uint posix_flags(const std::ios::openmode &mode);
|
|
}
|
|
|
|
decltype(ircd::fs::fd::opts::direct_io_enable)
|
|
ircd::fs::fd::opts::direct_io_enable
|
|
{
|
|
{ "name", "ircd.fs.fd.direct_io_enable" },
|
|
{ "default", true },
|
|
{ "persist", false },
|
|
};
|
|
|
|
#ifdef __linux__
|
|
size_t
|
|
ircd::fs::block_size(const fd &fd)
|
|
{
|
|
return 512UL;
|
|
}
|
|
#elif defined(HAVE_SYS_STAT_H)
|
|
size_t
|
|
ircd::fs::block_size(const fd &fd)
|
|
{
|
|
struct stat st;
|
|
syscall(::fstat, fd, &st);
|
|
return st.st_blksize;
|
|
}
|
|
#else
|
|
size_t
|
|
ircd::fs::block_size(const fd &fd)
|
|
{
|
|
return info::page_size;
|
|
}
|
|
#endif
|
|
|
|
/// This is not a standard UUID of any sort; this is custom, and intended for
|
|
/// rocksdb (though rocksdb has no requirement for its format specifically).
|
|
/// The format is plain-text, fs major and minor number, inode number, and
|
|
/// a three letter file type; all obtained from fstat(2).
|
|
ircd::string_view
|
|
ircd::fs::uuid(const fd &fd,
|
|
const mutable_buffer &buf)
|
|
{
|
|
struct stat stat;
|
|
syscall(::fstat, fd, &stat);
|
|
return fmt::sprintf
|
|
{
|
|
buf, "%u-%u-%lu-%s",
|
|
gnu_dev_major(stat.st_dev),
|
|
gnu_dev_minor(stat.st_dev),
|
|
stat.st_ino,
|
|
S_ISREG(stat.st_mode)? "reg":
|
|
S_ISDIR(stat.st_mode)? "dir":
|
|
"???"
|
|
};
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::size(const fd &fd)
|
|
{
|
|
const off_t cur
|
|
{
|
|
syscall(::lseek, fd, 0, SEEK_CUR)
|
|
};
|
|
|
|
const off_t end
|
|
{
|
|
syscall(::lseek, fd, 0, SEEK_END)
|
|
};
|
|
|
|
syscall(::lseek, fd, cur, SEEK_SET);
|
|
return end;
|
|
}
|
|
|
|
uint
|
|
ircd::fs::posix_flags(const std::ios::openmode &mode)
|
|
{
|
|
static const auto rdwr
|
|
{
|
|
std::ios::in | std::ios::out
|
|
};
|
|
|
|
uint ret{0};
|
|
if((mode & rdwr) == rdwr)
|
|
ret |= O_RDWR;
|
|
else if(mode & std::ios::out)
|
|
ret |= O_WRONLY;
|
|
else
|
|
ret |= O_RDONLY;
|
|
|
|
ret |= mode & std::ios::trunc? O_TRUNC : 0;
|
|
ret |= mode & std::ios::app? O_APPEND : 0;
|
|
ret |= ret & O_WRONLY? O_CREAT : 0;
|
|
ret |= ret & O_RDWR && ret & (O_TRUNC | O_APPEND)? O_CREAT : 0;
|
|
return ret;
|
|
}
|
|
|
|
const char *
|
|
ircd::fs::path_str(const string_view &s)
|
|
{
|
|
return data(strlcpy(path_buf, s));
|
|
}
|
|
|
|
//
|
|
// fd::opts
|
|
//
|
|
|
|
ircd::fs::fd::opts::opts(const std::ios::openmode &mode)
|
|
:mode
|
|
{
|
|
mode
|
|
}
|
|
,flags
|
|
{
|
|
posix_flags(mode)
|
|
}
|
|
,mask
|
|
{
|
|
flags & O_CREAT?
|
|
S_IRUSR | S_IWUSR:
|
|
0U
|
|
}
|
|
,ate
|
|
{
|
|
bool(mode & std::ios::ate)
|
|
}
|
|
{
|
|
}
|
|
|
|
//
|
|
// fd::fd
|
|
//
|
|
|
|
ircd::fs::fd::fd(const string_view &path)
|
|
:fd{path, opts{}}
|
|
{
|
|
}
|
|
|
|
ircd::fs::fd::fd(const string_view &path,
|
|
const opts &opts)
|
|
:fdno{[&path, &opts]
|
|
() -> int
|
|
{
|
|
uint flags(opts.flags);
|
|
flags |= opts.direct? O_DIRECT : 0UL;
|
|
flags |= opts.cloexec? O_CLOEXEC : 0UL;
|
|
flags &= opts.nocreate? ~O_CREAT : flags;
|
|
|
|
const mode_t &mode(opts.mask);
|
|
assert((flags & ~O_CREAT) || mode != 0);
|
|
|
|
const char *const &p(path_str(path));
|
|
return syscall(::open, p, flags, mode);
|
|
}()}
|
|
{
|
|
if(opts.ate)
|
|
syscall(::lseek, fdno, 0, SEEK_END);
|
|
}
|
|
|
|
ircd::fs::fd::fd(fd &&o)
|
|
noexcept
|
|
:fdno
|
|
{
|
|
std::move(o.fdno)
|
|
}
|
|
{
|
|
o.fdno = -1;
|
|
}
|
|
|
|
ircd::fs::fd &
|
|
ircd::fs::fd::operator=(fd &&o)
|
|
noexcept
|
|
{
|
|
this->~fd();
|
|
fdno = std::move(o.fdno);
|
|
o.fdno = -1;
|
|
return *this;
|
|
}
|
|
|
|
ircd::fs::fd::~fd()
|
|
noexcept(false)
|
|
{
|
|
if(fdno < 0)
|
|
return;
|
|
|
|
syscall(::close, fdno);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// fs/iov.h
|
|
//
|
|
|
|
ircd::fs::const_iovec_view
|
|
ircd::fs::make_iov(const iovec_view &iov,
|
|
const mutable_buffers &bufs,
|
|
const size_t &offset)
|
|
{
|
|
const size_t max
|
|
{
|
|
std::min(iov.size(), bufs.size())
|
|
};
|
|
|
|
size_t i(0), off(0);
|
|
for(; i < max; off += size(bufs[i++]))
|
|
if(size(bufs[i]) > offset - off)
|
|
{
|
|
off = offset - off;
|
|
break;
|
|
}
|
|
|
|
if(i < max)
|
|
{
|
|
assert(off <= size(bufs[i]));
|
|
iov.at(i) =
|
|
{
|
|
data(bufs[i]) + off, size(bufs[i]) - off
|
|
};
|
|
|
|
for(++i; i < max; ++i)
|
|
iov.at(i) =
|
|
{
|
|
data(bufs[i]), size(bufs[i])
|
|
};
|
|
}
|
|
|
|
const const_iovec_view ret{iov.data(), i};
|
|
assert(bytes(ret) <= buffer::buffers::size(bufs));
|
|
return ret;
|
|
}
|
|
|
|
ircd::fs::const_iovec_view
|
|
ircd::fs::make_iov(const iovec_view &iov,
|
|
const const_buffers &bufs,
|
|
const size_t &offset)
|
|
{
|
|
const size_t max
|
|
{
|
|
std::min(iov.size(), bufs.size())
|
|
};
|
|
|
|
size_t i(0), off(0);
|
|
for(; i < max; off += size(bufs[i++]))
|
|
if(size(bufs[i]) > offset - off)
|
|
{
|
|
off = offset - off;
|
|
break;
|
|
}
|
|
|
|
if(i < max)
|
|
{
|
|
assert(off <= size(bufs[i]));
|
|
iov.at(i) =
|
|
{
|
|
const_cast<char *>(data(bufs[i])) + off, size(bufs[i]) - off
|
|
};
|
|
|
|
for(++i; i < max; ++i)
|
|
iov.at(i) =
|
|
{
|
|
const_cast<char *>(data(bufs[i])), size(bufs[i])
|
|
};
|
|
}
|
|
|
|
const const_iovec_view ret{iov.data(), i};
|
|
assert(bytes(ret) <= buffer::buffers::size(bufs));
|
|
return ret;
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::bytes(const const_iovec_view &iov)
|
|
{
|
|
return std::accumulate(begin(iov), end(iov), size_t(0), []
|
|
(auto ret, const auto &iov)
|
|
{
|
|
return ret += iov.iov_len;
|
|
});
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// fs/error.h
|
|
//
|
|
|
|
std::error_code
|
|
ircd::make_error_code(const boost::filesystem::filesystem_error &e)
|
|
{
|
|
const boost::system::error_code &ec
|
|
{
|
|
e.code()
|
|
};
|
|
|
|
return make_error_code(ec);
|
|
}
|
|
|
|
//
|
|
// error::error
|
|
//
|
|
|
|
ircd::fs::error::error(const boost::filesystem::filesystem_error &code)
|
|
:std::system_error
|
|
{
|
|
make_error_code(code)
|
|
}
|
|
{
|
|
const string_view &msg
|
|
{
|
|
// Strip this prefix off the message to simplify it for our user.
|
|
lstrip(code.what(), "boost::filesystem::")
|
|
};
|
|
|
|
copy(this->buf, msg);
|
|
}
|
|
|
|
ircd::fs::error::error(const std::system_error &code)
|
|
:std::system_error{code}
|
|
{
|
|
string(this->buf, code);
|
|
}
|
|
|
|
ircd::fs::error::error(const std::error_code &code)
|
|
:std::system_error{code}
|
|
{
|
|
string(this->buf, code);
|
|
}
|
|
|
|
const char *
|
|
ircd::fs::error::what()
|
|
const noexcept
|
|
{
|
|
return this->ircd::error::what();
|
|
}
|