{"id":45695,"date":"2024-01-11T21:42:57","date_gmt":"2023-05-11T08:35:10","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/"},"modified":"2024-05-04T17:56:25","modified_gmt":"2024-05-04T09:56:25","slug":"45695-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/","title":{"rendered":""},"content":{"rendered":"<p>\u3053\u308c\u306fRust Advent Calendar 2017 11\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002<br \/>\n\u4eca\u56de\u306fRust\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u308brust-fuse\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h2>FUSE\uff08Filesystem in Userspace\uff09\u3068\u306f\uff1f<\/h2>\n<p>FUSE\u306f\u3001\u901a\u5e38\u30ab\u30fc\u30cd\u30eb\u7a7a\u9593\u3067\u63d0\u4f9b\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u6a5f\u80fd\u3092\u30e6\u30fc\u30b6\u7a7a\u9593\u4e0a\u3067\u5b9a\u7fa9\u3057\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3082\u306e\u3067\u3059\u3002<br \/>\n\u30e6\u30fc\u30b6\u7a7a\u9593\u3068\u30ab\u30fc\u30cd\u30eb\u7a7a\u9593\u306e\u6a4b\u6e21\u3057\u3092\u3059\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u30ab\u30fc\u30cd\u30eb\u5185\u3067\u306e\u51e6\u7406\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u88c5\u8005\u306f\u30ab\u30fc\u30cd\u30eb\u306e\u30b3\u30fc\u30c9\u3092\u3044\u3058\u308b\u3053\u3068\u306a\u304f\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u6210\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u5b9f\u88c5\u306flibfuse\u3068\u3057\u3066\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\nFUSE\u3092\u4f7f\u3063\u305f\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3068\u3057\u3066\u306f\u3001SSHFS\u3084GlusterFS\u3001gitfs\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>rust-fuse<\/h2>\n<p>rust-fuse\u306fRust\u3067FUSE\u3092\u5b9f\u88c5\u3067\u304d\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u305fcrate\u3067\u3001\u5358\u7d14\u306alibfuse\u306e\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u3067\u306f\u306a\u304fRust\u306b\u6700\u9069\u5316\u3057\u305f\u5f62\u3067\u6a5f\u80fd\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>rust-fuse\u306e\u5185\u90e8\u5b9f\u88c5\u306b\u3064\u3044\u3066\u65e5\u672c\u8a9e\u3067\u8aac\u660e\u3055\u308c\u3066\u3044\u308b\u30da\u30fc\u30b8\u304c\u4ee5\u4e0b\u306b\u3042\u308a\u307e\u3059\u3002<br \/>\n\u8208\u5473\u3042\u308b\u65b9\u306f\u898b\u3066\u307f\u308b\u3068\u3088\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">http:\/\/akiradeveloper.hatenadiary.com\/entry\/2015\/01\/12\/142641<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">http:\/\/akiradeveloper.hatenadiary.com\/entry\/2015\/01\/12\/161501<\/ul>\n<p>\u3061\u306a\u307f\u306b\u73fe\u6642\u70b9\u3067\u306erust-fuse\u306e\u5b89\u5b9a\u7248\u306fFUSE2.6\uff08FUSE Kernel ABI 7.8\uff09\u30d9\u30fc\u30b9\u3068\u306a\u3063\u3066\u304a\u308a\u3001Linux\u3067\u306f2.9.1\u3001macOS(OSXFUSE)\u3067\u306f3.0\uff08FUSE Kernel ABI 7.19\uff09\u3078\u306e\u5bfe\u5fdc\u3092\u304a\u3053\u306a\u3063\u3066\u3044\u308b\u6700\u4e2d\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n<h2>\u6700\u5c0f\u69cb\u6210\u3067\u52d5\u304b\u3057\u3066\u307f\u308b<\/h2>\n<p>\u524d\u7f6e\u304d\u304c\u9577\u304f\u306a\u308a\u307e\u3057\u305f\u304c\u3001\u624b\u59cb\u3081\u306b\u4f55\u3082\u3057\u306a\u3044\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nn\">[dependencies]<\/span>\r\n<span class=\"py\">fuse<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n<span class=\"py\">env_logger<\/span> <span class=\"p\">=<\/span> <span class=\"s\">\"0.3\"<\/span>\r\n<\/code><\/pre>\n<p>env_logger\u306f\u5fc5\u9808\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001rust-fuse\u306b\u3082logger\u3067\u30ed\u30b0\u304c\u57cb\u3081\u8fbc\u307e\u308c\u3066\u3044\u308b\u306e\u3067\u3001env_logger::init()\u3057\u3066\u74b0\u5883\u5909\u6570RUST_LOG\u306bdebug\u3042\u305f\u308a\u3092\u6e21\u3057\u3066\u304a\u304f\u3068\u52d5\u4f5c\u78ba\u8a8d\u304c\u697d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">env_logger<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">extern<\/span> <span class=\"n\">crate<\/span> <span class=\"n\">fuse<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">env<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">fuse<\/span><span class=\"p\">::<\/span><span class=\"n\">Filesystem<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">struct<\/span> <span class=\"n\">EmptyFS<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Filesystem<\/span> <span class=\"k\">for<\/span> <span class=\"n\">EmptyFS<\/span> <span class=\"p\">{}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nn\">env_logger<\/span><span class=\"p\">::<\/span><span class=\"nf\">init<\/span><span class=\"p\">()<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"fail logger init\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">mountpoint<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">env<\/span><span class=\"p\">::<\/span><span class=\"nf\">args_os<\/span><span class=\"p\">()<\/span><span class=\"nf\">.nth<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"usage: emptyfs MOUNTPOINT\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nn\">fuse<\/span><span class=\"p\">::<\/span><span class=\"nf\">mount<\/span><span class=\"p\">(<\/span><span class=\"n\">EmptyFS<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">mountpoint<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[])<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"fail mount()\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4f55\u3082\u306a\u3044fuse::Filesystem\u30c8\u30ec\u30a4\u30c8\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<p>fsroot\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u30de\u30a6\u30f3\u30c8\u30dd\u30a4\u30f3\u30c8\u306b\u3057\u3066\u8d77\u52d5\u3057\u3066\u307f\u307e\u3059\u3002<br \/>\n\u306a\u304a\u3001\u52d5\u4f5c\u74b0\u5883\u306fArch Linux\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> cargo build <span class=\"nt\">--release<\/span>\r\n<span class=\"gp\">$<\/span> <span class=\"nb\">mkdir <\/span>fsroot\r\n<span class=\"gp\">$<\/span> <span class=\"nv\">RUST_LOG<\/span><span class=\"o\">=<\/span>debug .\/target\/release\/emptyfs fsroot\r\n<span class=\"go\">INFO:fuse::session: Mounting fsroot\r\nDEBUG:fuse::request: INIT(1)   kernel: ABI 7.26, flags 0x1ffffb, max readahead 131072\r\nDEBUG:fuse::request: INIT(1) response: ABI 7.8, flags 0x1, max readahead 131072, max write 16777216\r\n<\/span><\/code><\/pre>\n<p>\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u306ffusermount\u30b3\u30de\u30f3\u30c9\u3067\u884c\u3048\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> fusermount <span class=\"nt\">-u<\/span> fsroot\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nv\">RUST_LOG<\/span><span class=\"o\">=<\/span>debug .\/target\/release\/emptyfs fsroot\r\n<span class=\"go\">    :\r\nINFO:fuse::session: Unmounted \/vagrant\/emptyfs\/fsroot\r\n<\/span><span class=\"gp\">$<\/span>\r\n<\/code><\/pre>\n<h2>\u521d\u671f\u51e6\u7406\u3068\u7d42\u4e86\u51e6\u7406<\/h2>\n<p>init()\u3068destroy()\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u521d\u671f\u51e6\u7406\u3068\u7d42\u4e86\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">os<\/span><span class=\"p\">::<\/span><span class=\"nn\">raw<\/span><span class=\"p\">::<\/span><span class=\"nb\">c_int<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">fuse<\/span><span class=\"p\">::{<\/span><span class=\"n\">Filesystem<\/span><span class=\"p\">,<\/span> <span class=\"n\">Request<\/span><span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">struct<\/span> <span class=\"n\">EmptyFS<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Filesystem<\/span> <span class=\"k\">for<\/span> <span class=\"n\">EmptyFS<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">init<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"p\">(),<\/span> <span class=\"nb\">c_int<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"my init\"<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nf\">Ok<\/span><span class=\"p\">(())<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">destroy<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"my destroy\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u300c\u3067\u304d\u307e\u3059\u300d\u3068\u66f8\u304d\u3064\u3064\u3001\u521d\u671f\u51e6\u7406\u306f\u3046\u307e\u304f\u52d5\u3044\u305f\u306e\u3067\u3059\u304c\u3001destroy()\u306f\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u3057\u305f\u308a\u30d7\u30ed\u30bb\u30b9\u7d42\u4e86\u3057\u305f\u3060\u3051\u3067\u306f\u547c\u3070\u308c\u307e\u305b\u3093\u3067\u3057\u305f\u3002<br \/>\n\u30c8\u30ea\u30ac\u3092\u3054\u5b58\u77e5\u306e\u65b9\u6559\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u30e1\u30e2\u30eaFS<\/h2>\n<p>FUSE\u3067\u3067\u304d\u308b\u3053\u3068\u3092\u77e5\u308b\u305f\u3081\u306b\u3001\u3082\u3046\u5c11\u3057\u5927\u304d\u306a\u4f8b\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n\u3053\u3053\u3067\u306f\u3001FUSE\u30d7\u30ed\u30bb\u30b9(\u30e1\u30e2\u30ea)\u4e0a\u3060\u3051\u3067\u30d5\u30a1\u30a4\u30eb\u7ba1\u7406\u3059\u308b\u30e1\u30e2\u30eaFS\u3082\u3069\u304d\u3092\u4f5c\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001\u3053\u3061\u3089\u306e\u30ea\u30dd\u30b8\u30c8\u30ea\u306b\u4eca\u56de\u306e\u30e1\u30e2\u30eaFS\u3082\u3069\u304d\u306e\u30b3\u30fc\u30c9\u3092\u7f6e\u3044\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u8208\u5473\u3042\u308b\u65b9\u306f\u307f\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u53c2\u7167<\/h3>\n<p>\u307e\u305a\u306f\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092ls\u30b3\u30de\u30f3\u30c9\u3067\u53c2\u7167\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u7528\u306e\u69cb\u9020\u4f53\u3068\u3057\u3066MemFS\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<br \/>\ni\u30ce\u30fc\u30c9\u756a\u53f7\u3092\u30ad\u30fc\u306b\u3001 \u89aa\u306ei\u30ce\u30fc\u30c9\u756a\u53f7\u3068\u30d1\u30b9\u540d\u3001rust-fuse\u3067\u30d5\u30a1\u30a4\u30eb\u5c5e\u6027\u3092\u5b9a\u7fa9\u3059\u308bfuse::FileAttr\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3059\u3002\uff08inodes\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">MemFS<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ &lt;ino, (parent_ino, path, fileattr)&gt;<\/span>\r\n    <span class=\"n\">inodes<\/span><span class=\"p\">:<\/span> <span class=\"n\">HashMap<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"p\">(<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"n\">FileAttr<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">Filesystem<\/span> <span class=\"k\">for<\/span> <span class=\"n\">MemFS<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">getattr<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyAttr<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">inode<\/span><span class=\"p\">,<\/span> <span class=\"n\">f<\/span><span class=\"p\">)<\/span> <span class=\"n\">in<\/span> <span class=\"k\">self<\/span><span class=\"py\">.inodes<\/span><span class=\"nf\">.iter<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">if<\/span> <span class=\"n\">ino<\/span> <span class=\"o\">==<\/span> <span class=\"n\">inode<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"n\">reply<\/span><span class=\"nf\">.attr<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">TTL<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">f<\/span><span class=\"na\">.2<\/span><span class=\"p\">);<\/span>\r\n                <span class=\"k\">return<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"c\">\/\/ \u4f55\u3082\u8fd4\u3059\u3082\u306e\u304c\u306a\u3044\u5834\u5408\u306flibc::ENOENT\u3092\u8fd4\u3057\u3066\u304a\u304f<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.error<\/span><span class=\"p\">(<\/span><span class=\"n\">ENOENT<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">readdir<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">fh<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">offset<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span><span class=\"p\">,<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyDirectory<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c\">\/\/ offset?<\/span>\r\n        <span class=\"c\">\/\/ see also: https:\/\/github.com\/libfuse\/libfuse\/blob\/master\/include\/fuse.h#L535<\/span>\r\n        <span class=\"c\">\/\/ readdir\u306b\u306f2\u3064\u306e\u30e2\u30fc\u30c9\u304c\u3042\u308b\u3089\u3057\u304f\u3001offset\u304c 0 or non-0 \u3067\u30e2\u30fc\u30c9\u304c\u5206\u304b\u308c\u308b\u3002<\/span>\r\n        <span class=\"c\">\/\/ \u3053\u3053\u3067\u306foffset==0\u306e\u6642\u306e\u307f\u51e6\u7406\u3055\u305b\u308b<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">offset<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"c\">\/\/ \u4eca\u306f\u56fa\u5b9a\u3067\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3068\u89aa\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u60c5\u5831\u306e\u307f\u3092\u8fd4\u3057\u3066\u304a\u304f<\/span>\r\n            <span class=\"n\">reply<\/span><span class=\"nf\">.add<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">Directory<\/span><span class=\"p\">,<\/span> <span class=\"s\">\".\"<\/span><span class=\"p\">);<\/span>\r\n            <span class=\"n\">reply<\/span><span class=\"nf\">.add<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">Directory<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"..\"<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.ok<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8a72\u5f53i\u30ce\u30fc\u30c9\u756a\u53f7\u306e\u30d5\u30a1\u30a4\u30eb\u5c5e\u6027\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306bgetattr()\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u547c\u3070\u308c\u308b\u306e\u3068\u3001<br \/>\n\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u8aad\u307f\u51fa\u3057\u3059\u308b\u305f\u3081\u306breaddir()\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u547c\u3070\u308c\u308b\u306e\u3067\u3001\u305d\u308c\u305e\u308c\u5b9a\u7fa9\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<p>rust-fuse\u3067\u306f\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u5bfe\u3059\u308b\u5fdc\u7b54(ReplyXX)\u3067\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u4e0a\u306e\u60c5\u5831\u3092\u8fd4\u3059\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\ngetattr()\u3067\u306fReplyAttr.attr()\u3067\u8a72\u5f53\u30d5\u30a1\u30a4\u30eb\u306e\u30d5\u30a1\u30a4\u30eb\u5c5e\u6027\u3092\u8fd4\u3057\u307e\u3059\u3002<br \/>\nreaddir()\u3067\u306fReplyDirectory.add()\u3067\u8a72\u5f53\u30a8\u30f3\u30c8\u30ea\u306e\u60c5\u5831\u3092\u8ffd\u52a0\u3057ReplyDirectory.ok()\u3067\u60c5\u5831\u3092\u78ba\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>reply.attr()\u306e\u7b2c1\u5f15\u6570TTL\u306fgetattr()\u306e\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u6642\u9593\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u5f8c\u307b\u3069\u8aac\u660e\u3059\u308blookup()\u306b\u3082\u540c\u69d8\u306e\u7d50\u679c\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u4ed5\u7d44\u307f\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>MemFS\u3067\u306f\u30de\u30a6\u30f3\u30c8\u524d\u306b\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u7528\u306e\u30c7\u30fc\u30bf\u3092\u4f5c\u6210\u3057\u3066\u304b\u3089\u30de\u30a6\u30f3\u30c8\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">file_create<\/span><span class=\"p\">(<\/span><span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">size<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">ftype<\/span><span class=\"p\">:<\/span> <span class=\"n\">FileType<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">FileAttr<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">t<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">time<\/span><span class=\"p\">::<\/span><span class=\"nf\">now<\/span><span class=\"p\">()<\/span><span class=\"nf\">.to_timespec<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"n\">FileAttr<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"n\">ino<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">size<\/span><span class=\"p\">:<\/span> <span class=\"n\">size<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">blocks<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">atime<\/span><span class=\"p\">:<\/span> <span class=\"n\">t<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">mtime<\/span><span class=\"p\">:<\/span> <span class=\"n\">t<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">ctime<\/span><span class=\"p\">:<\/span> <span class=\"n\">t<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">crtime<\/span><span class=\"p\">:<\/span> <span class=\"n\">t<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">kind<\/span><span class=\"p\">:<\/span> <span class=\"n\">ftype<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">perm<\/span><span class=\"p\">:<\/span> <span class=\"k\">match<\/span> <span class=\"n\">ftype<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">Directory<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"mi\">0o755<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"mi\">_<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"mi\">0o644<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">},<\/span>\r\n        <span class=\"n\">nlink<\/span><span class=\"p\">:<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">uid<\/span><span class=\"p\">:<\/span> <span class=\"mi\">501<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">gid<\/span><span class=\"p\">:<\/span> <span class=\"mi\">20<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">rdev<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">flags<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nn\">env_logger<\/span><span class=\"p\">::<\/span><span class=\"nf\">init<\/span><span class=\"p\">()<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"fail logger init\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">mountpoint<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">env<\/span><span class=\"p\">::<\/span><span class=\"nf\">args_os<\/span><span class=\"p\">()<\/span><span class=\"nf\">.nth<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"usage: memfs MOUNTPOINT\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">inodes<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">HashMap<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"c\">\/\/ \u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u3063\u3066\u304a\u304f<\/span>\r\n    <span class=\"n\">inodes<\/span><span class=\"nf\">.insert<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"p\">(<\/span><span class=\"s\">\"\/\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"nf\">file_create<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">Directory<\/span><span class=\"p\">)));<\/span>\r\n    <span class=\"c\">\/\/ \u30de\u30a6\u30f3\u30c8<\/span>\r\n    <span class=\"nn\">fuse<\/span><span class=\"p\">::<\/span><span class=\"nf\">mount<\/span><span class=\"p\">(<\/span><span class=\"n\">MemFS<\/span><span class=\"p\">{<\/span><span class=\"n\">inodes<\/span><span class=\"p\">:<\/span> <span class=\"n\">inodes<\/span><span class=\"p\">},<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">mountpoint<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[])<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"fail mount()\"<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nv\">RUST_LOG<\/span><span class=\"o\">=<\/span>debug .\/target\/release\/memfs fsroot\r\n<span class=\"go\">INFO:fuse::session: Mounting fsroot\r\nDEBUG:fuse::request: INIT(1)   kernel: ABI 7.26, flags 0x1ffffb, max readahead 131072\r\nDEBUG:fuse::request: INIT(1) response: ABI 7.8, flags 0x1, max readahead 131072, max write 16777216\r\n<\/span><\/code><\/pre>\n<p>ls\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u53c2\u7167\u3067\u304d\u308b\u304b\u8a66\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u6700\u521d\u306e\u4f55\u3082\u3057\u306a\u3044EmptyFS\u306e\u5834\u5408\u306f<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">ls<\/span> <span class=\"nt\">-al<\/span> fsroot\r\n<span class=\"go\">ls: cannot access 'fsroot': Function not implemented\r\n<\/span><\/code><\/pre>\n<p>\u3068\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u304c\u3001MemFS\u306e\u5834\u5408\u306f<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">ls<\/span> <span class=\"nt\">-a<\/span> fsroot\r\n<span class=\"go\">total 0\r\ndrwxr-xr-x 2     501 utmp      0 Dec 11 00:05 .\r\ndrwxr-xr-x 1 vagrant vagrant 306 Dec 10 22:49 ..\r\n<\/span><\/code><\/pre>\n<p>\u3068\u306a\u308a\u3001\u7121\u4e8b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u8aad\u307f\u51fa\u305b\u307e\u3057\u305f\u3002<\/p>\n<h3>\u30d5\u30a1\u30a4\u30eb\u4f5c\u6210<\/h3>\n<p>\u6b21\u306btouch\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u4f5c\u6210\u6642\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u5b58\u5728\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308blookup()\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3068\u3001\u30d5\u30a1\u30a4\u30eb\u4f5c\u6210\u3059\u308bcreate()\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3001\u30d5\u30a1\u30a4\u30eb\u5c5e\u6027\u3092\u8a2d\u5b9a\u3059\u308bsetattr()\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u547c\u3070\u308c\u308b\u306e\u3067\u3053\u308c\u3089\u3092\u5b9a\u7fa9\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span> <span class=\"n\">Filesystem<\/span> <span class=\"k\">for<\/span> <span class=\"n\">MemFS<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">lookup<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">parent<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">OsStr<\/span><span class=\"p\">,<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyEntry<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"p\">(<\/span><span class=\"mi\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">f<\/span><span class=\"p\">)<\/span> <span class=\"n\">in<\/span> <span class=\"k\">self<\/span><span class=\"py\">.inodes<\/span><span class=\"nf\">.iter<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">if<\/span> <span class=\"n\">f<\/span><span class=\"na\">.0<\/span> <span class=\"o\">==<\/span> <span class=\"n\">parent<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.to_str<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">()<\/span> <span class=\"o\">==<\/span> <span class=\"n\">f<\/span><span class=\"na\">.1<\/span><span class=\"nf\">.as_str<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"n\">reply<\/span><span class=\"nf\">.entry<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">TTL<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">f<\/span><span class=\"na\">.2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n                <span class=\"k\">return<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.error<\/span><span class=\"p\">(<\/span><span class=\"n\">ENOENT<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">create<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">parent<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">OsStr<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">mode<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">flag<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">,<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyCreate<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">inode<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">time<\/span><span class=\"p\">::<\/span><span class=\"nf\">now<\/span><span class=\"p\">()<\/span><span class=\"nf\">.to_timespec<\/span><span class=\"p\">()<\/span><span class=\"py\">.sec<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">f<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">file_create<\/span><span class=\"p\">(<\/span><span class=\"n\">inode<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">RegularFile<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">self<\/span><span class=\"py\">.inodes<\/span><span class=\"nf\">.insert<\/span><span class=\"p\">(<\/span><span class=\"n\">inode<\/span><span class=\"p\">,<\/span> <span class=\"p\">(<\/span><span class=\"n\">parent<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"nf\">.to_str<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">()<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">(),<\/span> <span class=\"n\">f<\/span><span class=\"p\">));<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.created<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">TTL<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">f<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">setattr<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">mode<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u32<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_u<\/span><span class=\"n\">id<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u32<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n               <span class=\"mi\">_<\/span><span class=\"n\">gid<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u32<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">size<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">atime<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Timespec<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n               <span class=\"mi\">_<\/span><span class=\"n\">mtime<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Timespec<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">fh<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">crtime<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Timespec<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n               <span class=\"mi\">_<\/span><span class=\"n\">chgtime<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Timespec<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">bkuptime<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Timespec<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">flags<\/span><span class=\"p\">:<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u32<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n               <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyAttr<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">match<\/span> <span class=\"k\">self<\/span><span class=\"py\">.inodes<\/span><span class=\"nf\">.get<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">ino<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/span><span class=\"p\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"n\">reply<\/span><span class=\"nf\">.attr<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">TTL<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">f<\/span><span class=\"na\">.2<\/span><span class=\"p\">),<\/span>\r\n            <span class=\"nb\">None<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"n\">reply<\/span><span class=\"nf\">.error<\/span><span class=\"p\">(<\/span><span class=\"n\">EACCES<\/span><span class=\"p\">),<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">touch <\/span>fsroot\/foo  <span class=\"c\"># \u5909\u66f4\u524d<\/span>\r\n<span class=\"go\">touch: cannot touch 'fsroot\/foo': Function not implemented\r\n<\/span><span class=\"gp\">$<\/span>\r\n\r\n<span class=\"gp\">$<\/span> <span class=\"nb\">touch <\/span>fsroot\/foo  <span class=\"c\"># \u5909\u66f4\u5f8c<\/span>\r\n<span class=\"gp\">$<\/span>\r\n<\/code><\/pre>\n<p>\u30d5\u30a1\u30a4\u30eb\u4f5c\u6210\u304c\u3067\u304d\u307e\u3057\u305f\u3068\u8a00\u3044\u305f\u3044\u3068\u3053\u308d\u3067\u3059\u304c\u3001\u3053\u306e\u307e\u307e\u3060\u3068ls\u30b3\u30de\u30f3\u30c9\u3067\u30d5\u30a1\u30a4\u30eb\u81ea\u4f53\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<br \/>\nreaddir()\u3092\u5909\u66f4\u3057\u3066\u4f5c\u6210\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u304c\u898b\u3048\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span> <span class=\"n\">Filesystem<\/span> <span class=\"k\">for<\/span> <span class=\"n\">MemFS<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">readdir<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">fh<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"n\">offset<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span><span class=\"p\">,<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyDirectory<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"n\">offset<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"n\">reply<\/span><span class=\"nf\">.ok<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"k\">return<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.add<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">Directory<\/span><span class=\"p\">,<\/span> <span class=\"s\">\".\"<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.add<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">Directory<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"..\"<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">reply_add_offset<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">for<\/span> <span class=\"p\">(<\/span><span class=\"mi\">_<\/span><span class=\"p\">,<\/span> <span class=\"n\">f<\/span><span class=\"p\">)<\/span> <span class=\"n\">in<\/span> <span class=\"k\">self<\/span><span class=\"py\">.inodes<\/span><span class=\"nf\">.iter<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">if<\/span> <span class=\"n\">ino<\/span> <span class=\"o\">==<\/span> <span class=\"n\">f<\/span><span class=\"na\">.0<\/span> <span class=\"p\">{<\/span>\r\n                <span class=\"k\">let<\/span> <span class=\"n\">attr<\/span> <span class=\"o\">=<\/span> <span class=\"n\">f<\/span><span class=\"na\">.2<\/span><span class=\"p\">;<\/span>\r\n                <span class=\"k\">let<\/span> <span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">f<\/span><span class=\"na\">.1<\/span><span class=\"p\">;<\/span>\r\n                <span class=\"n\">reply<\/span><span class=\"nf\">.add<\/span><span class=\"p\">(<\/span><span class=\"n\">attr<\/span><span class=\"py\">.ino<\/span><span class=\"p\">,<\/span> <span class=\"n\">reply_add_offset<\/span><span class=\"p\">,<\/span> <span class=\"n\">attr<\/span><span class=\"py\">.kind<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">);<\/span>\r\n                <span class=\"n\">reply_add_offset<\/span> <span class=\"o\">+=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.ok<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">touch <\/span>fsroot\/foo\r\n<span class=\"gp\">$<\/span> <span class=\"nb\">ls <\/span>fsroot <span class=\"nt\">-al<\/span>\r\n<span class=\"go\">total 0\r\ndrwxr-xr-x 2     501 utmp      0 Dec 11 13:35 .\r\ndrwxr-xr-x 1 vagrant vagrant 306 Dec 11 02:49 ..\r\n-rw-r--r-- 1     501 utmp      0 Dec 11 13:35 foo\r\n<\/span><\/code><\/pre>\n<p>\u7121\u4e8b\u3001\u4f5c\u6210\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u304c\u53c2\u7167\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<h3>\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d<\/h3>\n<p>\u7d9a\u3044\u3066\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d\u3092\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u307f\u307e\u3059\u3002<br \/>\necho\u30b3\u30de\u30f3\u30c9\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3067\u30d5\u30a1\u30a4\u30eb\u66f8\u304d\u8fbc\u307f\u3001\u305d\u306e\u30d5\u30a1\u30a4\u30eb\u3092cat\u30b3\u30de\u30f3\u30c9\u3067\u8aad\u307f\u51fa\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">echo<\/span> <span class=\"s2\">\"hogehoge\"<\/span> <span class=\"o\">&gt;<\/span> fsroot\/bar\r\n<span class=\"go\">-bash: echo: write error: Function not implemented\r\n<\/span><span class=\"gp\">$<\/span> <span class=\"nb\">cat <\/span>fsroot\/bar\r\n<span class=\"go\">cat: fsroot\/bar: Function not implemented\r\n<\/span><\/code><\/pre>\n<p>\u30d5\u30a1\u30a4\u30eb\u5185\u306e\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b\u30a8\u30ea\u30a2\u3068\u3057\u3066MemFS\u306bdatas\u30e1\u30f3\u30d0\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<br \/>\ni\u30ce\u30fc\u30c9\u756a\u53f7\u3092\u30ad\u30fc\u306b\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u96d1\u306bString\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">MemFS<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c\">\/\/ &lt;ino, (parent_ino, path, fileattr)&gt;<\/span>\r\n    <span class=\"n\">inodes<\/span><span class=\"p\">:<\/span> <span class=\"n\">HashMap<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"p\">(<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"n\">FileAttr<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n\r\n    <span class=\"c\">\/\/ &lt;ino, file_data&gt;<\/span>\r\n    <span class=\"n\">datas<\/span><span class=\"p\">:<\/span> <span class=\"n\">HashMap<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"nb\">String<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u66f8\u304d\u6642\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306fwrite()\u3068read()\u3067\u3059\u3002<br \/>\n\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">impl<\/span> <span class=\"n\">Filesystem<\/span> <span class=\"k\">for<\/span> <span class=\"n\">MemFS<\/span> <span class=\"p\">{<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">write<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">fh<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">offset<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span><span class=\"p\">,<\/span> <span class=\"n\">data<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span><span class=\"nb\">u8<\/span><span class=\"p\">],<\/span> <span class=\"mi\">_<\/span><span class=\"n\">flags<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">,<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyWrite<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c\">\/\/ \u66f8\u304d\u8fbc\u307f\u5bfe\u8c61\u306e\u30c7\u30fc\u30bf\u9577\u3092\u4fdd\u6301<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">length<\/span><span class=\"p\">:<\/span> <span class=\"nb\">usize<\/span> <span class=\"o\">=<\/span> <span class=\"n\">data<\/span><span class=\"nf\">.len<\/span><span class=\"p\">();<\/span>\r\n\r\n        <span class=\"c\">\/\/ String\u306b\u3057\u3066datas\u306b\u683c\u7d0d\u3059\u308b<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">String<\/span><span class=\"p\">::<\/span><span class=\"nf\">from_utf8<\/span><span class=\"p\">(<\/span><span class=\"n\">data<\/span><span class=\"nf\">.to_vec<\/span><span class=\"p\">())<\/span><span class=\"nf\">.expect<\/span><span class=\"p\">(<\/span><span class=\"s\">\"fail to-string\"<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">self<\/span><span class=\"py\">.datas<\/span><span class=\"nf\">.insert<\/span><span class=\"p\">(<\/span><span class=\"n\">ino<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"k\">let<\/span> <span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">f<\/span><span class=\"p\">)<\/span> <span class=\"o\">=<\/span> <span class=\"k\">self<\/span><span class=\"py\">.inodes<\/span><span class=\"nf\">.get_mut<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">ino<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">parent_ino<\/span> <span class=\"o\">=<\/span> <span class=\"n\">f<\/span><span class=\"na\">.0<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">f<\/span><span class=\"na\">.1<\/span><span class=\"nf\">.clone<\/span><span class=\"p\">();<\/span>\r\n            <span class=\"o\">*<\/span><span class=\"n\">f<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"n\">parent_ino<\/span><span class=\"p\">,<\/span> <span class=\"n\">name<\/span><span class=\"p\">,<\/span> <span class=\"nf\">file_create<\/span><span class=\"p\">(<\/span><span class=\"n\">ino<\/span><span class=\"p\">,<\/span> <span class=\"n\">length<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"nn\">FileType<\/span><span class=\"p\">::<\/span><span class=\"n\">RegularFile<\/span><span class=\"p\">));<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"c\">\/\/ \u66f8\u304d\u8fbc\u307f\u30b5\u30a4\u30ba\u3092\u4f1d\u3048\u308b<\/span>\r\n        <span class=\"n\">reply<\/span><span class=\"nf\">.written<\/span><span class=\"p\">(<\/span><span class=\"n\">length<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">read<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"k\">self<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">req<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">Request<\/span><span class=\"p\">,<\/span> <span class=\"n\">ino<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">fh<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">offset<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">size<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">,<\/span> <span class=\"n\">reply<\/span><span class=\"p\">:<\/span> <span class=\"n\">ReplyData<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">match<\/span> <span class=\"k\">self<\/span><span class=\"py\">.datas<\/span><span class=\"nf\">.get<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"n\">ino<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"p\">)<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"n\">reply<\/span><span class=\"nf\">.data<\/span><span class=\"p\">(<\/span><span class=\"n\">x<\/span><span class=\"nf\">.as_bytes<\/span><span class=\"p\">()),<\/span>    <span class=\"c\">\/\/ \u8aad\u307f\u51fa\u3057\u30c7\u30fc\u30bf\u5185\u5bb9\u3092\u4f1d\u3048\u308b<\/span>\r\n            <span class=\"nb\">None<\/span> <span class=\"k\">=&gt;<\/span> <span class=\"n\">reply<\/span><span class=\"nf\">.error<\/span><span class=\"p\">(<\/span><span class=\"n\">EACCES<\/span><span class=\"p\">),<\/span>            <span class=\"c\">\/\/ \u96d1\u306blibc::EACCES\u8fd4\u3059<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5b9f\u884c\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">echo<\/span> <span class=\"s2\">\"hogehoge\"<\/span> <span class=\"o\">&gt;<\/span> fsroot\/bar\r\n<span class=\"gp\">$<\/span> <span class=\"nb\">cat <\/span>fsroot\/bar\r\n<span class=\"go\">hogehoge\r\n<\/span><span class=\"gp\">$<\/span> <span class=\"nb\">ls<\/span> <span class=\"nt\">-la<\/span> fsroot\/\r\n<span class=\"go\">total 0\r\ndrwxr-xr-x 2     501 utmp      0 Dec 11 20:55 .\r\ndrwxr-xr-x 1 vagrant vagrant 306 Dec 11 02:49 ..\r\n-rw-r--r-- 1     501 utmp      9 Dec 11 20:55 bar\r\n<\/span><span class=\"gp\">$<\/span> <span class=\"nb\">ls<\/span> <span class=\"nt\">-la<\/span> fsroot\/bar\r\n<span class=\"go\">-rw-r--r-- 1 501 utmp 9 Dec 11 20:55 fsroot\/bar\r\n<\/span><span class=\"gp\">$<\/span>\r\n<\/code><\/pre>\n<p>\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u66f8\u304d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<h2>\u305d\u306e\u4ed6\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570<\/h2>\n<p>\u4eca\u56de\u7d39\u4ecb\u3057\u306a\u304b\u3063\u305f\u4e3b\u306a\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<div>\n<div class=\"post-table\">\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u6982\u8981symlink()\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u4f5c\u6210\u6642(ln -s\u7b49)link()\u30cf\u30fc\u30c9\u30ea\u30f3\u30af(ln\u7b49)unlink()\u524a\u9664(rm\u7b49)mkdir()\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u4f5c\u6210(mkdir\u7b49)rmdir()\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u524a\u9664(rmdir\u7b49)rename()\u30ea\u30cd\u30fc\u30e0(mv\u7b49)<\/div>\n<\/div>\n<p>\u8a73\u3057\u304f\u306frust-fuse\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u53c2\u7167\u3059\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h2>Rust\u306b\u3088\u308b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u5b9f\u88c5\u3042\u308c\u3053\u308c<\/h2>\n<p>Rust\u306b\u3088\u308bFUSE\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>anowell\/netfuse rust-fuse\u3092\u4f7f\u3063\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u306a\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0<\/p>\n<p>kahing\/catfs \u9069\u5ea6\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3057\u3066\u304f\u308c\u308b\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\uff1f<\/p>\n<p>wfraser\/fuse-mt \u30de\u30eb\u30c1\u30b9\u30ec\u30c3\u30c9\u306arust-fuse<\/p>\n<h2>\u304a\u308f\u308a\u306b<\/h2>\n<p>\u304b\u306a\u308a\u65e9\u8db3\u3067\u3057\u305f\u304cRust\u3067FUSE\u3092\u3055\u308f\u308b\u624b\u9806\u3092\u8aac\u660e\u3057\u307e\u3057\u305f\u3002<br \/>\n\u307f\u306a\u3055\u3093\u3082Rust\u3067\u81ea\u5206\u306e\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u5b9f\u88c5\u3057\u3066\u307f\u3066\u306f\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u308c\u306fRust Advent Calendar 2017 11\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u4eca\u56de\u306fRust\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45695","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u3053\u308c\u306fRust Advent Calendar 2017 11\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u4eca\u56de\u306fRust\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-11T08:35:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T09:56:25+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-05-11T08:35:10+00:00\",\"dateModified\":\"2024-05-04T09:56:25+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/64d5cc7727fffbff2f9a2a8da1de3e5c\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/64d5cc7727fffbff2f9a2a8da1de3e5c\",\"name\":\"\u6587, \u7fd4\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/920c3d673e0bccacc98e5e6b7149bb3c22edd8d39cb753e5d7d7e471498118a1?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/920c3d673e0bccacc98e5e6b7149bb3c22edd8d39cb753e5d7d7e471498118a1?s=96&d=mm&r=g\",\"caption\":\"\u6587, \u7fd4\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/wenxiang\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"- Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/","og_locale":"zh_CN","og_type":"article","og_description":"\u3053\u308c\u306fRust Advent Calendar 2017 11\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u4eca\u56de\u306fRust\u3092\u7528\u3044\u3066\u30d5\u30a1\u30a4\u30eb [&hellip;]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-05-11T08:35:10+00:00","article_modified_time":"2024-05-04T09:56:25+00:00","author":"\u6587, \u7fd4","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u6587, \u7fd4","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"5 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/","name":"- Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-05-11T08:35:10+00:00","dateModified":"2024-05-04T09:56:25+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/64d5cc7727fffbff2f9a2a8da1de3e5c"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/"]}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/64d5cc7727fffbff2f9a2a8da1de3e5c","name":"\u6587, \u7fd4","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/920c3d673e0bccacc98e5e6b7149bb3c22edd8d39cb753e5d7d7e471498118a1?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/920c3d673e0bccacc98e5e6b7149bb3c22edd8d39cb753e5d7d7e471498118a1?s=96&d=mm&r=g","caption":"\u6587, \u7fd4"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/wenxiang\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/45695-2\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=45695"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45695\/revisions"}],"predecessor-version":[{"id":99818,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/45695\/revisions\/99818"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=45695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=45695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=45695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}