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| author | Yang Shi <yang.shi@windriver.com> | 2012-04-10 18:33:43 -0700 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2012-04-11 12:15:32 +0100 |
| commit | b23b2b42a0c1ff6243227cb7d38c8cb6ae388bcf (patch) | |
| tree | 72b522f9b00dd127dbc4263ba866e95a0ab20d02 /meta/recipes-core/initrdscripts/files | |
| parent | 88b399bb2c8adcf8563d144c0838cbcdd45c0694 (diff) | |
| download | ast2050-yocto-poky-b23b2b42a0c1ff6243227cb7d38c8cb6ae388bcf.zip ast2050-yocto-poky-b23b2b42a0c1ff6243227cb7d38c8cb6ae388bcf.tar.gz | |
initrdscripts: fix init-live.sh and use unionfs
[YOCTO #1487]
When booting up with liveCD image, init scripts can't work well on read-only filesystem. Unionfs,
which is supported in Yocto kernel, allows a filesystem to appear as writeable, but without
actually allowing writes to change the filesystem.
Use unionfs to mount rootfs and make root file system can be writen when using liveCD to boot up.
Set UNION_FS variable depending on kernel config, so that it can work with kernel which doesn't
have unionfs feature.
[RP: Mark recipe as machine specific due to kernel dependency]
(From OE-Core rev: b7f4e8d153c2aebbcf6556e7e926f6b94801d6aa)
Signed-off-by: Yang Shi <yang.shi@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-core/initrdscripts/files')
| -rw-r--r-- | meta/recipes-core/initrdscripts/files/init-live.sh | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh index eb5ab5b..737dae4 100644 --- a/meta/recipes-core/initrdscripts/files/init-live.sh +++ b/meta/recipes-core/initrdscripts/files/init-live.sh @@ -7,6 +7,7 @@ ROOT_IMAGE="rootfs.img" MOUNT="/bin/mount" UMOUNT="/bin/umount" ISOLINUX="" +UNIONFS="no" early_setup() { mkdir /proc @@ -89,17 +90,31 @@ case $label in mkdir $ROOT_MOUNT mknod /dev/loop0 b 7 0 2>/dev/null - if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then - fatal "Couldnt mount rootfs image" + + if [ "$UNIONFS" = "yes" ]; then + mkdir /rootfs-tmp + + if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE /rootfs-tmp ; then + fatal "Could not mount rootfs image" + else + mkdir /cow + mount -t tmpfs -o rw,noatime,mode=755 tmpfs /cow + mount -t unionfs -o dirs=/cow:/rootfs-tmp=ro unionfs $ROOT_MOUNT + boot_live_root + fi else - boot_live_root + if ! $MOUNT -o rw,loop,noatime,nodiratime /media/$i/$ISOLINUX/$ROOT_IMAGE $ROOT_MOUNT ; then + fatal "Could not mount rootfs image" + else + boot_live_root + fi fi ;; install) if [ -f /media/$i/$ISOLINUX/$ROOT_IMAGE ] ; then ./install.sh $i/$ISOLINUX $ROOT_IMAGE $video_mode $vga_mode else - fatal "Couldnt find install script" + fatal "Could not find install script" fi # If we're getting here, we failed... |
