From 9fc0ede38aa9c86bdde9d7a6125d28a191f5a5f6 Mon Sep 17 00:00:00 2001
From: zjregee <zjregee@gmail.com>
Date: Tue, 4 Jun 2024 14:10:36 +0800
Subject: [PATCH 1/2] add readme and user configuration for ovfs

---
 bin/ovfs/Cargo.lock  | 1427 +++++++++++++++++++++++++++++++++++++++++-
 bin/ovfs/Cargo.toml  |    5 +
 bin/ovfs/README.md   |   60 ++
 bin/ovfs/src/main.rs |   55 +-
 4 files changed, 1529 insertions(+), 18 deletions(-)
 create mode 100644 bin/ovfs/README.md

diff --git a/bin/ovfs/Cargo.lock b/bin/ovfs/Cargo.lock
index c8ccf2a841a9..059c44f242c3 100644
--- a/bin/ovfs/Cargo.lock
+++ b/bin/ovfs/Cargo.lock
@@ -2,6 +2,94 @@
 # It is not intended for manual editing.
 version = 3
 
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+name = "addr2line"
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+checksum = "6e4503c46a5c0c7844e948c9a4d6acd9f50cccb4de1c48eb9e291ea17470c678"
+dependencies = [
+ "gimli",
+]
+
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+
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+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
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+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
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+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
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+ "anstyle-wincon",
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+
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+checksum = "c03a11a9034d92058ceb6ee011ce58af4a9bf61491aa7e1e59ecd24bd40d22d4"
+dependencies = [
+ "utf8parse",
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+dependencies = [
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+dependencies = [
+ "anstyle",
+ "windows-sys 0.52.0",
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 [[package]]
 name = "anyhow"
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@@ -14,6 +102,56 @@ version = "1.7.1"
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 checksum = "69f7f8c3906b62b754cd5326047894316021dcfe5a194c8ea52bdd94934a3457"
 
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+ "cc",
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@@ -26,12 +164,447 @@ version = "2.5.0"
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+]
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
 [[package]]
 name = "vhost"
 version = "0.11.0"
@@ -202,6 +1318,119 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "want"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfa7760aed19e106de2c7c0b581b509f2f25d3dacaf737cb82ac61bc6d760b0e"
+dependencies = [
+ "try-lock",
+]
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4be2531df63900aeb2bca0daaaddec08491ee64ceecbee5076636a3b026795a8"
+dependencies = [
+ "cfg-if",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "614d787b966d3989fa7bb98a654e369c762374fd3213d212cfc0251257e747da"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76bc14366121efc8dbb487ab05bcc9d346b3b5ec0eaa76e46594cabbe51762c0"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1f8823de937b71b9460c0c34e25f3da88250760bec0ebac694b49997550d726"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e94f17b526d0a461a191c78ea52bbce64071ed5c04c9ffe424dcb38f74171bb7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.92"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
+
+[[package]]
+name = "wasm-streams"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b65dc4c90b63b118468cf747d8bf3566c1913ef60be765b5730ead9e0a3ba129"
+dependencies = [
+ "futures-util",
+ "js-sys",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
+[[package]]
+name = "web-sys"
+version = "0.3.69"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77afa9a11836342370f4817622a2f0f418b134426d91a82dfb48f532d2ec13ef"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "webpki-roots"
+version = "0.26.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3de34ae270483955a94f4b21bdaaeb83d508bb84a01435f393818edb0012009"
+dependencies = [
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -223,3 +1452,167 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-core"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
+dependencies = [
+ "windows-targets 0.52.5",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets 0.48.5",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.5",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+dependencies = [
+ "windows_aarch64_gnullvm 0.48.5",
+ "windows_aarch64_msvc 0.48.5",
+ "windows_i686_gnu 0.48.5",
+ "windows_i686_msvc 0.48.5",
+ "windows_x86_64_gnu 0.48.5",
+ "windows_x86_64_gnullvm 0.48.5",
+ "windows_x86_64_msvc 0.48.5",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f0713a46559409d202e70e28227288446bf7841d3211583a4b53e3f6d96e7eb"
+dependencies = [
+ "windows_aarch64_gnullvm 0.52.5",
+ "windows_aarch64_msvc 0.52.5",
+ "windows_i686_gnu 0.52.5",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc 0.52.5",
+ "windows_x86_64_gnu 0.52.5",
+ "windows_x86_64_gnullvm 0.52.5",
+ "windows_x86_64_msvc 0.52.5",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7088eed71e8b8dda258ecc8bac5fb1153c5cffaf2578fc8ff5d61e23578d3263"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
+
+[[package]]
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+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
+
+[[package]]
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+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
+
+[[package]]
+name = "winreg"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a277a57398d4bfa075df44f501a17cfdf8542d224f0d36095a2adc7aee4ef0a5"
+dependencies = [
+ "cfg-if",
+ "windows-sys 0.48.0",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ced3678a2879b30306d323f4542626697a464a97c0a07c9aebf7ebca65cd4dde"
diff --git a/bin/ovfs/Cargo.toml b/bin/ovfs/Cargo.toml
index 9903fbf3f99e..3684d6f6dadf 100644
--- a/bin/ovfs/Cargo.toml
+++ b/bin/ovfs/Cargo.toml
@@ -21,12 +21,17 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+url = "2.5.0"
+log = "0.4.21"
 snafu = "0.8.3"
 libc = "0.2.139"
 vhost = "0.11.0"
+env_logger = "0.11.2"
 virtio-queue = "0.11.0"
 vmm-sys-util = "0.12.1"
 virtio-bindings = "0.2.1"
 vhost-user-backend = "0.14.0"
 anyhow = { version = "1.0.86", features = ["std"] }
+opendal = { version = "0.46.0", path = "../../core" }
+clap = { version = "4.5.1", features = ["derive", "env"] }
 vm-memory = { version = "0.14.0", features = ["backend-mmap", "backend-atomic"] }
diff --git a/bin/ovfs/README.md b/bin/ovfs/README.md
new file mode 100644
index 000000000000..c5a4d584da0b
--- /dev/null
+++ b/bin/ovfs/README.md
@@ -0,0 +1,60 @@
+# OpenDAL File System via Virtio (WIP)
+
+OpenDAL File System via Virtio (ovfs) is a backend implementation of VirtioFS. It provides a file system interface for VMs based on OpenDAL, aiming to accelerate VMs IO performance by VirtIO and seamlessly connect with various storage backends.
+
+Note that this project is still under development and is not yet ready to run.
+
+## How to Use
+
+The following components are required:
+- Rust environment on the host to run ovfs
+- QEMU 4.2 or later for built-in virtiofs support
+- A Linux 5.4 or later guest kernel for built-in virtiofs support
+
+### Install QEMU and VMs
+
+```shell
+sudo apt-get -y qemu qemu-kvm # debian/ubuntu
+```
+
+Download and install the VM, taking Ubuntu as an example:
+
+```shell
+wget https://releases.ubuntu.com/20.04/ubuntu-20.04.6-live-server-amd64.iso
+qemu-img create -f qcow2 ubuntu.qcow2 20G
+qemu-system-x86_64 -enable-kvm -smp 8 -m 16G -cdrom ubuntu-20.04.6-live-server-amd64.iso -drive file=ubuntu.qcow2,format=qcow2 -boot d
+```
+
+### Mount shared directory on VMs
+
+Run ovfs and set the listening socket path and service configuration used:
+
+```shell
+host# cargo run --release <socket-path> <backend-url>
+```
+
+backend-url is the URL that includes the scheme and parameters of the service used, in the following format:
+- fs://?root=<directory>
+- s3://?root=<path>&bucket=<bucket>&endpoint=<endpoint>&region=<region>&access_key_id=<access-key-id>&secret_access_key=<secret-access-key>
+
+Run the VM through QEMU and create a virtiofs device:
+
+```shell
+host# qemu-system-x86_64 -M pc -cpu host --enable-kvm -smp 8 \
+     -m 16G -object memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on -numa node,memdev=mem \
+     -chardev socket,id=char0,path=<socket-path> -device vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=<fs-tag> \
+     -chardev stdio,mux=on,id=mon -mon chardev=mon,mode=readline -device virtio-serial-pci -device virtconsole,chardev=mon -vga none -display none \
+     -drive if=virtio,file=ubuntu.qcow2
+```
+
+Mount a shared directory in the VM:
+
+```shell
+guest# sudo mount -t virtiofs <fs-tag> <mount-point>
+```
+
+## License and Trademarks
+
+Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
+
+Apache OpenDAL, OpenDAL, and Apache are either registered trademarks or trademarks of the Apache Software Foundation.
diff --git a/bin/ovfs/src/main.rs b/bin/ovfs/src/main.rs
index d38f87407fd6..9b78b76f83cd 100644
--- a/bin/ovfs/src/main.rs
+++ b/bin/ovfs/src/main.rs
@@ -19,6 +19,59 @@ mod error;
 mod virtiofs;
 mod virtiofs_utils;
 
+use std::collections::HashMap;
+use std::str::FromStr;
+
+use clap::Parser;
+use opendal::{Operator, Scheme};
+use url::Url;
+
+/// User configuration for ovfs.
+#[derive(Parser, Debug)]
+#[command(version, about)]
+struct Config {
+    /// socket path used to connect with VMs
+    #[arg(env = "OVFS_MOUT_PATH", index = 1)]
+    socket_path: String,
+
+    /// location of opendal service
+    /// format: <scheme>://?<key>=<value>&<key>=<value>
+    /// example: fs://?root=/tmp
+    #[arg(env = "OVFS_BACKEND", index = 2)]
+    backend: Url,
+}
+
 fn main() {
-    unimplemented!()
+    let cfg = Config::parse();
+
+    env_logger::init();
+
+    if cfg.backend.has_host() {
+        log::warn!("backend host will be ignored");
+    }
+
+    let scheme_str = cfg.backend.scheme();
+    let op_args = cfg
+        .backend
+        .query_pairs()
+        .into_owned()
+        .collect::<HashMap<String, String>>();
+
+    let scheme = match Scheme::from_str(scheme_str) {
+        Ok(Scheme::Custom(_)) | Err(_) => {
+            log::error!("invalid backend scheme: {}", scheme_str);
+            return;
+        }
+        Ok(s) => s,
+    };
+
+    let _ = match Operator::via_map(scheme, op_args) {
+        Ok(operator) => operator,
+        Err(_) => {
+            log::error!("invalid args to build backend");
+            return;
+        }
+    };
+
+    log::error!("unimplemented project is not yet ready to run");
 }

From 4af2c06cc303715bb770e27cf9daa9bb478d9ff0 Mon Sep 17 00:00:00 2001
From: zjregee <zjregee@gmail.com>
Date: Wed, 12 Jun 2024 17:25:21 +0800
Subject: [PATCH 2/2] update version

---
 bin/ovfs/Cargo.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/ovfs/Cargo.toml b/bin/ovfs/Cargo.toml
index 3684d6f6dadf..06a0996f4a8c 100644
--- a/bin/ovfs/Cargo.toml
+++ b/bin/ovfs/Cargo.toml
@@ -32,6 +32,6 @@ vmm-sys-util = "0.12.1"
 virtio-bindings = "0.2.1"
 vhost-user-backend = "0.14.0"
 anyhow = { version = "1.0.86", features = ["std"] }
-opendal = { version = "0.46.0", path = "../../core" }
+opendal = { version = "0.47.0", path = "../../core" }
 clap = { version = "4.5.1", features = ["derive", "env"] }
 vm-memory = { version = "0.14.0", features = ["backend-mmap", "backend-atomic"] }