From a383e6bb465c4e4f35bb5d45161992944c021743 Mon Sep 17 00:00:00 2001
From: Tycho Andersen <tycho@docker.com>
Date: Wed, 8 Mar 2017 11:09:31 -0800
Subject: [PATCH] hoist kernel cmdline into moby.yaml

Signed-off-by: Tycho Andersen <tycho@docker.com>
---
 Makefile                          | 10 +++----
 config.go                         |  5 +++-
 main.go                           | 47 ++++++++++++++++++++-----------
 moby.yaml                         |  4 ++-
 output.go                         | 12 ++++----
 scripts/hyperkit.sh               |  3 +-
 scripts/qemu.sh                   |  3 +-
 test.yaml                         |  4 ++-
 tools/mkimage-iso-bios/Dockerfile |  2 +-
 tools/mkimage-iso-bios/make-iso   |  3 +-
 tools/mkimage-iso-efi/Dockerfile  |  2 +-
 tools/mkimage-iso-efi/make-efi    |  6 ++--
 12 files changed, 60 insertions(+), 41 deletions(-)

diff --git a/Makefile b/Makefile
index 657d3d145..d7c5aa448 100644
--- a/Makefile
+++ b/Makefile
@@ -26,8 +26,8 @@ test-bzImage: test-initrd.img
 
 # interactive versions need to use volume mounts
 .PHONY: qemu qemu-iso
-qemu: moby-initrd.img moby-bzImage
-	./scripts/qemu.sh $^
+qemu: moby-initrd.img moby-bzImage bin/moby moby.yaml
+	./scripts/qemu.sh moby-initrd.img moby-bzImage "$(shell bin/moby --cmdline moby.yaml)"
 
 qemu-iso: alpine/mobylinux-bios.iso
 	./scripts/qemu.sh $^
@@ -56,8 +56,8 @@ else
 endif
 
 .PHONY: hyperkit hyperkit-test
-hyperkit: scripts/hyperkit.sh bin/com.docker.hyperkit bin/vpnkit moby-initrd.img moby-bzImage
-	./scripts/hyperkit.sh moby
+hyperkit: scripts/hyperkit.sh bin/com.docker.hyperkit bin/vpnkit moby-initrd.img moby-bzImage moby.yaml
+	./scripts/hyperkit.sh moby "$(shell bin/moby --cmdline moby.yaml)"
 
 define check_test_log
 	@cat $1 |grep -q 'Moby test suite PASSED'
@@ -65,7 +65,7 @@ endef
 
 hyperkit-test: scripts/hyperkit.sh bin/com.docker.hyperkit bin/vpnkit test-initrd.img test-bzImage
 	rm -f disk.img
-	script -q /dev/null ./scripts/hyperkit.sh test | tee test.log
+	script -q /dev/null ./scripts/hyperkit.sh test "$(shell bin/moby --cmdline moby.yaml)" | tee test.log
 	$(call check_test_log, test.log)
 
 .PHONY: test
diff --git a/config.go b/config.go
index 37a2bc345..d086d2d58 100644
--- a/config.go
+++ b/config.go
@@ -14,7 +14,10 @@ import (
 
 // Moby is the type of a Moby config file
 type Moby struct {
-	Kernel string
+	Kernel struct {
+		Image   string
+		Cmdline string
+	}
 	Init   string
 	System []MobyImage
 	Daemon []MobyImage
diff --git a/main.go b/main.go
index 33f92e677..9ef5d9dfc 100644
--- a/main.go
+++ b/main.go
@@ -4,11 +4,11 @@ import (
 	"archive/tar"
 	"bytes"
 	"errors"
+	"flag"
 	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
-	"os"
 	"os/exec"
 	"path/filepath"
 
@@ -129,17 +129,7 @@ func containersInitrd(containers []*bytes.Buffer) (*bytes.Buffer, error) {
 	return w, nil
 }
 
-func build(configfile string) {
-	config, err := ioutil.ReadFile(configfile)
-	if err != nil {
-		log.Fatalf("Cannot open config file: %v", err)
-	}
-
-	m, err := NewConfig(config)
-	if err != nil {
-		log.Fatalf("Invalid config: %v", err)
-	}
-
+func build(m *Moby) {
 	containers := []*bytes.Buffer{}
 
 	// get kernel bzImage and initrd tarball from container
@@ -148,7 +138,7 @@ func build(configfile string) {
 		bzimageName = "bzImage"
 		ktarName    = "kernel.tar"
 	)
-	out, err := dockerRun(m.Kernel, "tar", "cf", "-", bzimageName, ktarName)
+	out, err := dockerRun(m.Kernel.Image, "tar", "cf", "-", bzimageName, ktarName)
 	if err != nil {
 		log.Fatalf("Failed to extract kernel image and tarball: %v", err)
 	}
@@ -211,11 +201,34 @@ func build(configfile string) {
 	}
 }
 
-var conf = "moby.yaml"
+var (
+	conf    string
+	cmdline bool
+)
 
 func main() {
-	if len(os.Args) >= 2 {
-		conf = os.Args[1]
+	flag.BoolVar(&cmdline, "cmdline", false, "Print the kernel command line and exit")
+	flag.Parse()
+
+	conf = "moby.yaml"
+	if len(flag.Args()) > 0 {
+		conf = flag.Args()[0]
 	}
-	build(conf)
+
+	config, err := ioutil.ReadFile(conf)
+	if err != nil {
+		log.Fatalf("Cannot open config file: %v", err)
+	}
+
+	m, err := NewConfig(config)
+	if err != nil {
+		log.Fatalf("Invalid config: %v", err)
+	}
+
+	if cmdline {
+		fmt.Printf("%s\n", m.Kernel.Cmdline)
+		return
+	}
+
+	build(m)
 }
diff --git a/moby.yaml b/moby.yaml
index cc993cd8e..8f96526bc 100644
--- a/moby.yaml
+++ b/moby.yaml
@@ -1,4 +1,6 @@
-kernel: "mobylinux/kernel:598481c08deafa37dccb33c88ad69fdecda57909"
+kernel:
+  image: "mobylinux/kernel:598481c08deafa37dccb33c88ad69fdecda57909"
+  cmdline: "console=ttyS0 page_poison=1"
 init: "mobylinux/init:2f1b5c1be1157cb17e5b1e6dee171dccdebb5277"
 system:
   - name: sysctl
diff --git a/output.go b/output.go
index 34f8e92c5..95f4cdb8c 100644
--- a/output.go
+++ b/output.go
@@ -9,8 +9,8 @@ import (
 )
 
 const (
-	bios = "mobylinux/mkimage-iso-bios:6b3ef6d6bdcc5fdf2ee683febac99533c2268c89@sha256:2484146c4dfbd2eee83d9dd3adf84d9232e5dd739d8762275dcd50bf60a529c6"
-	efi  = "mobylinux/mkimage-iso-efi:40f35270037dae95584324427e56f829756ff145@sha256:ae5b37ae560a5e030342f3d493d4ad611f2694bcd54eba86bf42ca069da986a7"
+	bios = "mobylinux/mkimage-iso-bios:489b1f054a77a8f379d0bfc6cd91639b4db6b67c@sha256:0f058951aac4367d132682aa19eeb5cdcb05600a5d51fe5d0fcbd97b03ae4f87"
+	efi  = "mobylinux/mkimage-iso-efi:b210c58e096e53082d35b28fa2b52dba6ae200c8@sha256:10c2789bf5fbd27c35c5fe2f3b97f75a7108bbde389d0f5ed750e3e2dae95376"
 )
 
 func outputs(m *Moby, base string, bzimage []byte, initrd []byte) error {
@@ -22,12 +22,12 @@ func outputs(m *Moby, base string, bzimage []byte, initrd []byte) error {
 				return fmt.Errorf("Error writing %s output: %v", o.Format, err)
 			}
 		case "iso-bios":
-			err := outputISO(bios, base+".iso", bzimage, initrd)
+			err := outputISO(bios, base+".iso", bzimage, initrd, m.Kernel.Cmdline)
 			if err != nil {
 				return fmt.Errorf("Error writing %s output: %v", o.Format, err)
 			}
 		case "iso-efi":
-			err := outputISO(efi, base+"-efi.iso", bzimage, initrd)
+			err := outputISO(efi, base+"-efi.iso", bzimage, initrd, m.Kernel.Cmdline)
 			if err != nil {
 				return fmt.Errorf("Error writing %s output: %v", o.Format, err)
 			}
@@ -41,7 +41,7 @@ func outputs(m *Moby, base string, bzimage []byte, initrd []byte) error {
 }
 
 // TODO add kernel command line
-func outputISO(image, filename string, bzimage []byte, initrd []byte) error {
+func outputISO(image, filename string, bzimage []byte, initrd []byte, args ...string) error {
 	// first build the input tarball from kernel and initrd
 	buf := new(bytes.Buffer)
 	tw := tar.NewWriter(buf)
@@ -75,7 +75,7 @@ func outputISO(image, filename string, bzimage []byte, initrd []byte) error {
 	if err != nil {
 		return err
 	}
-	iso, err := dockerRunInput(buf, image)
+	iso, err := dockerRunInput(buf, append([]string{image}, args...)...)
 	if err != nil {
 		return err
 	}
diff --git a/scripts/hyperkit.sh b/scripts/hyperkit.sh
index 4a6bc9c13..4521bf4ed 100755
--- a/scripts/hyperkit.sh
+++ b/scripts/hyperkit.sh
@@ -7,8 +7,7 @@ PREFIX="moby"
 
 KERNEL="$PREFIX-bzImage"
 INITRD="$PREFIX-initrd.img"
-
-CMDLINE="earlyprintk=serial console=ttyS0"
+CMDLINE="$2"
 
 SLIRP_SOCK="$HOME/Library/Containers/com.docker.docker/Data/s50"
 
diff --git a/scripts/qemu.sh b/scripts/qemu.sh
index a04a45b77..c4c790d9f 100755
--- a/scripts/qemu.sh
+++ b/scripts/qemu.sh
@@ -12,6 +12,7 @@ fi
 
 FILE=$1
 FILE2=$2
+CMDLINE=$3
 [ -z "$FILE" ] && FILE="$PWD/moby"
 
 BASE=$(basename "$FILE")
@@ -32,4 +33,4 @@ BASE=$(basename "$FILE")
 MOUNTS="-v $FILE:/tmp/$BASE"
 BASE2=$(basename "$FILE2")
 [ ! -z "$FILE2" ] && MOUNTS="$MOUNTS -v $FILE2:/tmp/$BASE2"
-docker run -it --rm $MOUNTS "$QEMU_IMAGE" console=ttyS0
+docker run -it --rm $MOUNTS "$QEMU_IMAGE" $CMDLINE
diff --git a/test.yaml b/test.yaml
index 7912eaec4..68ad67590 100644
--- a/test.yaml
+++ b/test.yaml
@@ -1,4 +1,6 @@
-kernel: "mobylinux/kernel:598481c08deafa37dccb33c88ad69fdecda57909"
+kernel:
+  image: "mobylinux/kernel:598481c08deafa37dccb33c88ad69fdecda57909"
+  cmdline: "console=ttyS0"
 init: "mobylinux/init:2f1b5c1be1157cb17e5b1e6dee171dccdebb5277"
 system:
   - name: binfmt
diff --git a/tools/mkimage-iso-bios/Dockerfile b/tools/mkimage-iso-bios/Dockerfile
index 691c8d10c..f49ee54e8 100644
--- a/tools/mkimage-iso-bios/Dockerfile
+++ b/tools/mkimage-iso-bios/Dockerfile
@@ -10,4 +10,4 @@ RUN \
 
 COPY . .
 
-CMD [ "/make-iso" ]
+ENTRYPOINT [ "/make-iso" ]
diff --git a/tools/mkimage-iso-bios/make-iso b/tools/mkimage-iso-bios/make-iso
index e32f321c3..54daf237d 100755
--- a/tools/mkimage-iso-bios/make-iso
+++ b/tools/mkimage-iso-bios/make-iso
@@ -14,6 +14,7 @@ cd /tmp/iso
 
 INITRD="$(find . -name '*.img')"
 KERNEL="$(find . -name vmlinuz64 -or -name bzImage)"
+CMDLINE="$*"
 
 [ "$KERNEL" = "vmlinuz64" ] || mv "$KERNEL" vmlinuz64
 [ "$INITRD" = "initrd.img" ] || mv "$INITRD" initrd.img
@@ -29,7 +30,7 @@ CFG="DEFAULT linux
 LABEL linux
     KERNEL /vmlinuz64
     INITRD /initrd.img
-    APPEND earlyprintk=serial console=ttyS0 console=tty1 $*
+    APPEND ${CMDLINE}
 "
 
 printf "$CFG" > isolinux/isolinux.cfg
diff --git a/tools/mkimage-iso-efi/Dockerfile b/tools/mkimage-iso-efi/Dockerfile
index 81a951319..06b366f84 100644
--- a/tools/mkimage-iso-efi/Dockerfile
+++ b/tools/mkimage-iso-efi/Dockerfile
@@ -12,4 +12,4 @@ RUN \
 
 COPY . .
 
-CMD [ "/make-efi" ]
+ENTRYPOINT [ "/make-efi" ]
diff --git a/tools/mkimage-iso-efi/make-efi b/tools/mkimage-iso-efi/make-efi
index d3186a6ac..66f9e3131 100755
--- a/tools/mkimage-iso-efi/make-efi
+++ b/tools/mkimage-iso-efi/make-efi
@@ -14,6 +14,7 @@ cd /tmp/efi
 
 INITRD="$(find . -name '*.img')"
 KERNEL="$(find . -name vmlinuz64 -or -name bzImage)"
+CMDLINE="$*"
 
 [ "$KERNEL" = "vmlinuz64" ] || mv "$KERNEL" vmlinuz64
 [ "$INITRD" = "initrd.img" ] || mv "$INITRD" initrd.img
@@ -21,13 +22,10 @@ KERNEL="$(find . -name vmlinuz64 -or -name bzImage)"
 # clean up subdirectories
 find . -mindepth 1 -maxdepth 1 -type d | xargs rm -rf
 
-# Docker for Windows specific options, should be moved
-WINDOWS_OPTIONS="mobyplatform=windows vsyscall=emulate page_poison=1 panic=1 rootdelay=300 noautodetect"
-
 # Create a EFI boot file with kernel and initrd. From:
 # https://github.com/haraldh/mkrescue-uefi/blob/master/mkrescue-uefi.sh
 cp /usr/lib/gummiboot/linuxx64.efi.stub .
-echo "earlyprintk=ttyS0,115200 console=ttyS0,115200 $WINDOWS_OPTIONS" > cmdline.txt
+echo "${CMDLINE} rootdelay=300 noautodetect" > cmdline.txt
 
 objcopy \
 	--add-section .osrel=/etc/os-release --change-section-vma .osrel=0x20000 \