Add csr wasm module to repo (#67)

* Add csr wasm module to repo

* Add install wasm32-unknown-unknown target to makefile

* Add rustup to all linux users

Cargo.toml

@@ -0,0 +1,10 @@
+[workspace]
+
+members = [
+    "wasm-modules/csr-rust",
+]
+
+[profile.release]
+lto = 'thin'
+opt-level = "s"
+debug = false

Makefile

@@ -70,16 +70,24 @@ nasp-objs :=  third-party/wasm3/source/m3_api_libc.o \
 # Set the path to the Kernel build utils.
 KBUILD=/lib/modules/$(shell uname -r)/build/
 
-default: static/socket_wasm.h
+default: static/socket_wasm.h static/module_csr.h
 	cd third-party/BearSSL && $(MAKE) linux-km
 	$(MAKE) -C $(KBUILD) M=$(PWD) V=$(VERBOSE) modules
 
 static/socket_wasm.h: socket.rego
 	opa build -t wasm -e "socket/allow" socket.rego -o bundle.tar.gz
-	tar zxvf bundle.tar.gz /policy.wasm
+	tar zxf bundle.tar.gz /policy.wasm
 	mv policy.wasm socket.wasm
 	xxd -i socket.wasm static/socket_wasm.h
 
+CSR_MODULE_DIRS = $(shell find wasm-modules/csr-rust -type d)
+CSR_MODULE_FILES = $(shell find wasm-modules/csr-rust -type f -name '*')
+
+static/module_csr.h: wasm-modules/csr-rust $(CSR_MODULE_DIRS) $(CSR_MODULE_FILES)
+	cargo build --release --target=wasm32-unknown-unknown
+	cp target/wasm32-unknown-unknown/release/csr-rust.wasm module_csr.wasm
+	xxd -i module_csr.wasm static/module_csr.h
+
 opa-test:
 	opa test *.rego -v
 
@@ -120,7 +128,15 @@ _install_opa:
 	sudo curl -L -o /usr/bin/opa https://openpolicyagent.org/downloads/v0.56.0/opa_linux_$(shell go version | cut -f2 -d'/')_static
 	sudo chmod +x /usr/bin/opa
 
-setup-vm: _debian_deps _install_opa
+_install_wasm_target:
+	sudo curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+	sudo ln -s $$HOME/.cargo/bin/* /usr/bin/
+	rustup default stable
+	rustup target add wasm32-unknown-unknown
+	sudo rustup default stable
+	sudo rustup target add wasm32-unknown-unknown
+
+setup-vm: _debian_deps _install_opa _install_wasm_target
 	sudo cp /sys/kernel/btf/vmlinux /usr/lib/modules/`uname -r`/build/
 
 setup-archlinux-vm: _archlinux_deps _install_opa

main.c

@@ -62,7 +62,7 @@ static int __init nasp_init(void)
         }
     }
 
-    result = load_module("csr_module", module_csr, size_module_csr, NULL);
+    result = load_module("csr_module", module_csr_wasm, module_csr_wasm_len, NULL);
     if (result.err)
     {
         FATAL("load_module -> csr_module: %s", result.err);

wasm-modules/csr-rust/.cargo/config.toml

@@ -0,0 +1,3 @@
+[build]
+# rustflags = ["-C", "target-feature=+multivalue"]
+target = "wasm32-unknown-unknown"