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| author |   Patrick Ohly <patrick.ohly@intel.com> | 2015-09-03 20:42:32 +0200 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2015-09-06 15:24:26 +0100 |
| commit | 1e29d77d0d33ee216b43022439876863f0db39bb (patch) | |
| tree | 7ea393243cee6ac458135024ae913050c848f9b9 /meta/classes/syslinux.bbclass | |
| parent | 7fa76bd923fd643cf0984077321d6064d8ec3a2b (diff) | |
| download | openembedded-core-contrib-1e29d77d0d33ee216b43022439876863f0db39bb.tar.gz | |
boot loader: support root=UUID
As mentioned when introducing the VM images
(https://bugzilla.yoctoproject.org/show_bug.cgi?id=7374), the
resulting images only work when the image is mounted as a disk that
results in the hard-coded path (/dev/sda in the current
default). Using the file system UUID to find the rootfs is more
flexible.
To enable this for boot-direct.bbclass and thus image-vm.bbclass (aka
FSTYPEs vdi/vmdk/qcow2), set SYSLINUX_ROOT =
"root=UUID=<<uuid-of-rootfs>>". The rootfs image must use an ext file
system.
The special string will get replaced in the APPEND line with the
actual UUID when the boot loader (grub-efi, syslinux or gummiboot)
writes the boot loader configuration files. At that time, the rootfs
image has already been created and its UUID can be extracted using
"tune2fs -l", which also should be available because the
e2fsprogs-native tools were needed to create the image in the first
place.
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/classes/syslinux.bbclass')
| -rw-r--r-- | meta/classes/syslinux.bbclass | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/meta/classes/syslinux.bbclass b/meta/classes/syslinux.bbclass index d6498d98bb..44ef9a9176 100644 --- a/meta/classes/syslinux.bbclass +++ b/meta/classes/syslinux.bbclass @@ -34,6 +34,9 @@ ISO_BOOTCAT = "isolinux/boot.cat" MKISOFS_OPTIONS = "-no-emul-boot -boot-load-size 4 -boot-info-table" APPEND_prepend = " ${SYSLINUX_ROOT} " +# Need UUID utility code. +inherit fs-uuid + syslinux_populate() { DEST=$1 BOOTDIR=$2 @@ -177,7 +180,7 @@ python build_syslinux_cfg () { cfgfile.write('initrd=/initrd ') cfgfile.write('LABEL=%s '% (label)) - + append = replace_rootfs_uuid(d, append) cfgfile.write('%s %s\n' % (append, btype[1])) else: cfgfile.write('APPEND %s\n' % btype[1]) |