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From: Jeremy Kerr <jk@ozlabs.org>
To: buildroot@busybox.net
Subject: [Buildroot] [RFC, PATCH 6/8] package/petitboot: Add petitboot, the userspace bootloader
Date: Thu, 16 Jan 2014 16:52:18 +0800	[thread overview]
Message-ID: <1389862338.919458.196762877880.6.gpush@pablo> (raw)
In-Reply-To: <1389862338.917573.283530987294.0.gpush@pablo>

This change adds the petitboot package, a bootloader that exists in
userspace, and uses the kexec facility to boot into a new kernel.

We add a little extra infrastructure to get things integrated into a
buildroot environment:

 - scripts to make kexec work with busybox init, for a clean shutdown

 - udev rules to get removable event notifications, and start the
   petitboot UI processes

 - startup scripts for the device-discovery process

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

---
 package/Config.in                            |    1 
 package/petitboot/Config.in                  |   10 +++
 package/petitboot/S14silence-console         |    9 +++
 package/petitboot/S15pb-discover             |   23 +++++++
 package/petitboot/kexec-restart              |    8 ++
 package/petitboot/petitboot-console-ui.rules |    5 +
 package/petitboot/petitboot.mk               |   57 +++++++++++++++++++
 package/petitboot/removable-event-poll.rules |    4 +
 8 files changed, 117 insertions(+)

diff --git a/package/Config.in b/package/Config.in
index f5161475..f650476c 100644
--- a/package/Config.in
+++ b/package/Config.in
@@ -1007,6 +1007,7 @@ source "package/monit/Config.in"
 source "package/ncdu/Config.in"
 source "package/numactl/Config.in"
 source "package/nut/Config.in"
+source "package/petitboot/Config.in"
 source "package/powerpc-utils/Config.in"
 source "package/polkit/Config.in"
 if BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
diff --git a/package/petitboot/Config.in b/package/petitboot/Config.in
new file mode 100644
index 00000000..2f587c06
--- /dev/null
+++ b/package/petitboot/Config.in
@@ -0,0 +1,10 @@
+config BR2_PACKAGE_PETITBOOT
+	bool "petitboot"
+	depends on BR2_PACKAGE_KEXEC || BR2_PACKAGE_KEXEC_LITE
+	select BR2_PACKAGE_NCURSES
+	select BR2_PACKAGE_UDEV
+	select BR2_PACKAGE_POWERPC_UTILS if BR2_powerpc
+	help
+	  Petitboot is a small kexec-based bootloader
+
+	  http://www.kernel.org/pub/linux/kernel/people/geoff/petitboot/petitboot.html
diff --git a/package/petitboot/S14silence-console b/package/petitboot/S14silence-console
new file mode 100755
index 00000000..65702005
--- /dev/null
+++ b/package/petitboot/S14silence-console
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+case "$1" in
+    start)
+        echo 0 0 7 0 > /proc/sys/kernel/printk
+        ;;
+esac
+
+exit 0
diff --git a/package/petitboot/S15pb-discover b/package/petitboot/S15pb-discover
new file mode 100755
index 00000000..ebdf9449
--- /dev/null
+++ b/package/petitboot/S15pb-discover
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+LOGFILE=/var/log/petitboot/pb-discover.log
+PIDFILE=/var/run/petitboot.pid
+
+case "$1" in
+    start)
+        ulimit -c unlimited
+        mkdir -p $(dirname $LOGFILE)
+        PATH=/usr/bin:/usr/sbin:/bin:/sbin pb-discover -l $LOGFILE &
+        echo $! > $PIDFILE
+        ;;
+    stop)
+        pid=$(cat $PIDFILE)
+        [ -n "$pid" ] && kill -TERM $pid
+        ;;
+    *)
+        echo "Usage: $0 {start|stop}"
+        exit 1
+        ;;
+esac
+
+exit 0
diff --git a/package/petitboot/kexec-restart b/package/petitboot/kexec-restart
new file mode 100755
index 00000000..0175e76d
--- /dev/null
+++ b/package/petitboot/kexec-restart
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+/usr/sbin/kexec -f -e
+
+while :
+do
+    sleep 1
+done
diff --git a/package/petitboot/petitboot-console-ui.rules b/package/petitboot/petitboot-console-ui.rules
new file mode 100644
index 00000000..74648562
--- /dev/null
+++ b/package/petitboot/petitboot-console-ui.rules
@@ -0,0 +1,5 @@
+
+# spawn a petitboot UI on common user-visible interface devices
+SUBSYSTEM=="tty", KERNEL=="hvc*", RUN+="/usr/libexec/petitboot/pb-console --getty --detach -- -n -i 0 $name vt100"
+SUBSYSTEM=="tty", KERNEL=="tty0", RUN+="/usr/libexec/petitboot/pb-console --getty --detach -- -n -i 0 $name vt100"
+SUBSYSTEM=="tty", KERNEL=="ttyS*", RUN+="/usr/libexec/petitboot/pb-console --getty --detach -- -n -i 0 $name vt100"
diff --git a/package/petitboot/petitboot.mk b/package/petitboot/petitboot.mk
new file mode 100644
index 00000000..b8a2179d
--- /dev/null
+++ b/package/petitboot/petitboot.mk
@@ -0,0 +1,57 @@
+#############################################################
+#
+# petitboot
+#
+#############################################################
+PETITBOOT_VERSION = af805399
+PETITBOOT_SITE = git://git.ozlabs.org/home/jk/git/petitboot
+PETITBOOT_DEPENDENCIES = ncurses udev
+PETITBOOT_LICENSE = GPLv2
+PETITBOOT_LICENSE_FILES = COPYING
+
+PETITBOOT_CONF_OPT += --with-ncurses --without-twin-x11 --without-twin-fbdev \
+		      --localstatedir=/var --with-tftp=busybox \
+		      HOST_PROG_KEXEC=/usr/sbin/kexec \
+		      HOST_PROG_SHUTDOWN=/usr/libexec/petitboot/bb-kexec-reboot
+
+ifdef PETITBOOT_DEBUG
+PETITBOOT_CONF_OPT += --enable-debug
+endif
+
+ifeq ($(BR2_PACKAGE_NCURSES_WIDEC),y)
+PETITBOOT_CONF_OPT += --with-ncursesw MENU_LIB=-lmenuw FORM_LIB=-lformw
+endif
+
+define PETITBOOT_PRE_CONFIGURE_BOOTSTRAP
+	(cd $(@D) && ./bootstrap $(PETITBOOT_VERSION))
+endef
+
+PETITBOOT_PRE_CONFIGURE_HOOKS += PETITBOOT_PRE_CONFIGURE_BOOTSTRAP
+
+define PETITBOOT_POST_INSTALL
+	$(INSTALL) -D -m 0755 $(@D)/utils/bb-kexec-reboot \
+		$(TARGET_DIR)/usr/libexec/petitboot
+	$(INSTALL) -d -m 0755 $(TARGET_DIR)/etc/petitboot/boot.d
+	$(INSTALL) -D -m 0755 $(@D)/utils/hooks/01-create-default-dtb \
+		$(TARGET_DIR)/etc/petitboot/boot.d/
+	$(INSTALL) -D -m 0755 $(@D)/utils/hooks/20-set-stdout \
+		$(TARGET_DIR)/etc/petitboot/boot.d/
+
+	$(INSTALL) -D -m 0755 package/petitboot/S14silence-console \
+		$(TARGET_DIR)/etc/init.d/
+	$(INSTALL) -D -m 0755 package/petitboot/S15pb-discover \
+		$(TARGET_DIR)/etc/init.d/
+	$(INSTALL) -D -m 0755 package/petitboot/kexec-restart \
+		$(TARGET_DIR)/usr/sbin/
+	$(INSTALL) -D -m 0755 package/petitboot/petitboot-console-ui.rules \
+		$(TARGET_DIR)/etc/udev/rules.d/
+	$(INSTALL) -D -m 0755 package/petitboot/removable-event-poll.rules \
+		$(TARGET_DIR)/etc/udev/rules.d/
+
+	ln -sf /usr/sbin/pb-udhcpc \
+		$(TARGET_DIR)/usr/share/udhcpc/default.script.d/
+endef
+
+PETITBOOT_POST_INSTALL_TARGET_HOOKS += PETITBOOT_POST_INSTALL
+
+$(eval $(autotools-package))
diff --git a/package/petitboot/removable-event-poll.rules b/package/petitboot/removable-event-poll.rules
new file mode 100644
index 00000000..b736aef6
--- /dev/null
+++ b/package/petitboot/removable-event-poll.rules
@@ -0,0 +1,4 @@
+
+# petitboot needs notification for media change events on removable devices,
+# which we only get if we've set the poll_msecs sysfs attribute.
+ACTION!="remove", ATTR{removable}=="1", ATTR{events_poll_msecs}="2000"

  parent reply	other threads:[~2014-01-16  8:52 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-16  8:52 [Buildroot] [RFC, PATCH 0/8] Enable a buildroot-based petitboot bootloader Jeremy Kerr
2014-01-16  8:52 ` [Buildroot] [RFC, PATCH 7/8] package/iprutils: Add IBM Power RAID utilities Jeremy Kerr
2014-01-16 13:24   ` Jerzy Grzegorek
2014-01-17  1:58     ` Jeremy Kerr
2014-01-30 20:54   ` Thomas Petazzoni
2014-01-16  8:52 ` [Buildroot] [RFC, PATCH 1/8] package/busybox: Add facility for DHCP hooks Jeremy Kerr
2014-03-04 20:01   ` Yann E. MORIN
2014-01-16  8:52 ` [Buildroot] [RFC, PATCH 4/8] package/powerpc-utils: Add powerpc hardware utilities Jeremy Kerr
2014-01-16  9:30   ` Baruch Siach
2014-01-16 13:11   ` Jerzy Grzegorek
2014-01-29  8:12   ` Thomas Petazzoni
2014-01-30  1:51     ` Jeremy Kerr
2014-01-16  8:52 ` [Buildroot] [RFC, PATCH 2/8] package/dropbear: Add separate configuration options for client and server Jeremy Kerr
2014-03-03 23:46   ` Yann E. MORIN
2014-03-03 23:54     ` Jeremy Kerr
2014-03-04  0:14   ` Gustavo Zacarias
2014-03-04  1:07     ` Jeremy Kerr
2014-03-04  1:44       ` Gustavo Zacarias
2014-03-04  1:51         ` Jeremy Kerr
2014-03-04 18:36           ` Yann E. MORIN
2014-01-16  8:52 ` [Buildroot] [RFC,PATCH 8/8] Add powerpc petitboot defconfig Jeremy Kerr
2014-01-16  8:52 ` [Buildroot] [RFC, PATCH 5/8] package/kexec-lite: Add a package for the kexec-lite tools Jeremy Kerr
2014-01-16  9:36   ` Baruch Siach
2014-01-17  1:51     ` Jeremy Kerr
2014-01-16 13:17   ` Jerzy Grzegorek
2014-01-30 19:46   ` Thomas Petazzoni
2014-02-03  5:37     ` Jeremy Kerr
2014-02-03  7:04       ` Thomas Petazzoni
2014-02-28  7:11       ` Jeremy Kerr
2014-02-28  7:37         ` Thomas Petazzoni
2014-01-30 19:47   ` Thomas Petazzoni
2014-01-16  8:52 ` Jeremy Kerr [this message]
2014-01-30 20:51   ` [Buildroot] [RFC, PATCH 6/8] package/petitboot: Add petitboot, the userspace bootloader Thomas Petazzoni
2014-02-28  5:39     ` Jeremy Kerr
2014-01-16  8:52 ` [Buildroot] [RFC, PATCH 3/8] package/ncurses: Allow building wide char support Jeremy Kerr
2014-01-30 19:44   ` Thomas Petazzoni
2014-02-28  2:53     ` Jeremy Kerr
2014-01-17  2:16 ` [Buildroot] [RFC, PATCH 0/8] Enable a buildroot-based petitboot bootloader Jeremy Kerr

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