Merge unikernel-demo with full history

unikernel-demo/.gitignore

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+*.cmd
+*.img
+*.o

unikernel-demo/Makefile

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+all:
+	$(MAKE) -C ../../../whiterose/ UKL=$(CURDIR) bzImage
+
+../../disk.img:
+	qemu-img create ../../disk.img 0g
+	mkfs.ext2 ../../disk.img
+	mkdir tmp_mnt
+	sudo mount -o loop ../../disk.img tmp_mnt
+	sudo debootstrap --arch amd64 jessie tmp_mnt
+	sudo umount tmp_mnt
+	rmdir tmp_mnt
+
+qemu: ../../disk.img
+	qemu-system-x86_64 -enable-kvm -s -m 1G -nographic -cpu host\
+		-kernel ../../../whiterose/arch/x86/boot/bzImage\
+		-append "console=ttyS0 ukl-hybrid quiet root=/dev/sda"\
+		-hda ../../disk.img
+
+qemu-ukl: ../../disk.img
+	qemu-system-x86_64 -enable-kvm -s -m 1G -nographic -cpu host\
+		-kernel ../../../whiterose/arch/x86/boot/bzImage\
+		-append "console=ttyS0 ukl quiet root=/dev/sda"\
+		-hda ../../disk.img

unikernel-demo/README.md

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+# unikernel-demo
+
+### setup
+
+##### Requirements
+- qemu
+- debootstrap
+
+##### Clone & Configure the kernel
+```
+git clone https://github.com/ne02ptzero/whiterose
+cd whiterose && make defconfig
+```
+
+It will apply the default of the linux kernel, with UKL support. If you're
+trying to run this on exotic hardware, now is a good time to change the
+configuration. As long as you keep `CONFIG_UKL_LINUX` to `true`, you should be
+fine.
+
+##### Clone && Running the examples
+```
+git clone https://github.com/jzck/unikernel-demo
+cd unikernel-demo
+```
+
+Each example come with a Makefile. For example, if you want to run the unistd
+example, simply do:
+```
+make -C fs1/unistd all qemu
+```
+
+Or stdio:
+```
+make -C fs1/stdio all qemu
+```

unikernel-demo/fs1/stat/Makefile

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+export ukl-obj-m := main.o
+
+include ../../Makefile

unikernel-demo/fs1/stat/main.c

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+#include <stdio.h>
+#include <sys/stat.h>
+
+#ifndef USERSPACE
+#define main ukl_main
+#endif
+
+int main(void)
+{
+    struct stat st = { 0 };
+
+    if (stat("/etc/passwd", &st) != 0)
+    {
+        fprintf(stderr, "Cannot stat() /etc/passwd\n");
+        return 1;
+    }
+
+    printf("Size of /etc/passwd: %zu bytes\n", st.st_size);
+    return 0;
+}

unikernel-demo/fs1/stdio/Makefile

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+export ukl-obj-m := main.o
+
+include ../../Makefile

unikernel-demo/fs1/stdio/main.c

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+#include <stdio.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#ifndef USERSPACE
+#define main ukl_main
+#endif
+
+int main(void) {
+    FILE        *f = fopen("/etc/passwd", "r");
+    ssize_t     ret;
+    char        buf[256] = { 0 };
+
+    if (f == NULL)
+    {
+        fputs("Cannot open /etc/passwd\n", stderr);
+        return 1;
+    }
+
+    while ((ret = fread(buf, 1, sizeof(buf), f)))
+        fwrite(buf, ret, 1, stdout);
+
+    fclose(f);
+    return 0;
+}

unikernel-demo/fs1/unistd/Makefile

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+export ukl-obj-m := main.o
+
+include ../../Makefile

unikernel-demo/fs1/unistd/main.c

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+#include <unistd.h>
+#include <fcntl.h>
+
+#ifndef USERSPACE
+# define main ukl_main
+#endif
+
+int main(void) {
+	char        buf[256] = { 0 };
+	int         fd = open("/etc/passwd", O_RDONLY);
+	ssize_t     ret;
+
+	if (fd == -1)
+		return 1;
+
+	while ((ret = read(fd, buf, sizeof(buf))))
+	{
+		buf[ret] = 0;
+		write(1, buf, ret);
+	}
+
+	close(fd);
+
+	return 0;
+}

unikernel-demo/io1/printf/Makefile

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+export ukl-obj-m := main.o
+
+include ../../Makefile

unikernel-demo/io1/printf/main.c

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+#include <stdio.h>
+
+#ifndef USERSPACE
+#define main ukl_main
+#endif
+
+typedef struct {
+    char a;
+    char *b;
+    int c;
+} test_t;
+
+int main(void) {
+    char        str[250];
+    test_t      test = {
+        .a = 'a',
+        .b = "Hello!",
+        .c = 10
+    };
+
+    printf("a = %c, b = %s, c = %d\n", test.a, test.b, test.c);
+    snprintf(str, sizeof(str), "a = %c, b = %s, c = %d\n", test.a, test.b, test.c);
+    puts(str);
+    return 0;
+}

unikernel-demo/network1/Makefile

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+PACKAGES = bash coreutils iputils net-tools strace util-linux iproute pciutils 
+TARGET = min-initrd.d
+SMD = supermin.d
+bzImage = ../../whiterose/x86/boot/bzImage
+
+export ukl-obj-m := main.o
+    
+all: $(target)/root
+	$(MAKE) -C ../../whiterose/ UKL=$(PWD) bzImage
+
+supermin.d/packages:
+	supermin --prepare $(PACKAGES) -o $(SMD)
+
+supermin.d/init.tar.gz: init
+	tar zcf $@ $^
+
+$(TARGET)/root: supermin.d/packages supermin.d/init.tar.gz 
+	supermin --build -v -v -v --size 8G --if-newer --format ext2 supermin.d -o ${@D}
+
+qemu:
+	qemu-system-x86_64 -enable-kvm -s -m 1G -nographic -cpu host\
+	       	-kernel $(bzImage)\
+		-initrd min-initrd.d/initrd\
+		-hda min-initrd.d/root\
+		-append "console=ttyS0 ukl quiet"\
+	       	--device  virtio-net,netdev=usernet -netdev user,id=usernet,hostfwd=tcp::5555-:5555

unikernel-demo/network1/main.c

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+// https://github.com/mafintosh/echo-servers.c/blob/master/tcp-echo-server.c
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <unistd.h> 
+#include <netinet/in.h> 
+
+#define BUFFER_SIZE 1024
+
+int main(int argc, char *argv[]) {
+
+  int port = 5555;
+
+  int server_fd, client_fd, err;
+  struct sockaddr_in server, client;
+  char buf[BUFFER_SIZE];
+
+  server_fd = socket(AF_INET, SOCK_STREAM, 0); // ukl_socket
+
+  server.sin_family = AF_INET;
+  server.sin_port = __builtin_bswap16 (port);
+  server.sin_addr.s_addr = (uint32_t) 0x00000000;
+
+  int opt_val = 1;
+  setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt_val, sizeof opt_val); // ukl_
+
+  err = bind(server_fd, (struct sockaddr *) &server, sizeof(server));
+
+  err = listen(server_fd, 128);
+
+  while (1) {
+    socklen_t client_len = sizeof(client);
+    client_fd = accept(server_fd, (struct sockaddr *) &client, &client_len); // ukl_accept
+
+    while (1) {
+      int read = recv(client_fd, buf, BUFFER_SIZE, 0); //  (recvfrom, fd, buf, len, flags, NULL, NULL);
+
+      if (!read) break;
+
+      err = send(client_fd, buf, read, 0); // (sendto, fd, buf, len, flags, NULL, 0);
+
+    }
+  }
+
+  return 0;
+}