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wic: squashfs partition support

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It is possible to instruct wic to create a squashfs partition by setting
--fstype=squashfs in *.wks. For now this is only useable for rootfs
partitions (note that you must have squashfs support in the kernel). An
attempt to create an empty partition will produce a warning.

(From OE-Core rev: 30266a0be946bd0ce76d6920e7afe840c6c3bf80)

Signed-off-by: Maciej Borzecki <maciej.borzecki@open-rnd.pl>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Maciej Borzecki
2014-07-24 14:11:50 +02:00
committed by Richard Purdie
parent 5e7de54d3d
commit 73ce04eb6d
1 changed files with 61 additions and 0 deletions
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61
scripts/lib/mic/kickstart/custom_commands/partition.py
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@@ -25,6 +25,8 @@
#
import shutil
import os
import tempfile
from pykickstart.commands.partition import *
from mic.utils.oe.misc import *
@@ -192,6 +194,10 @@ class Wic_PartData(Mic_PartData):
return self.prepare_rootfs_vfat(cr_workdir, oe_builddir,
rootfs_dir, native_sysroot,
pseudo)
elif self.fstype.startswith("squashfs"):
return self.prepare_rootfs_squashfs(cr_workdir, oe_builddir,
rootfs_dir, native_sysroot,
pseudo)
def prepare_rootfs_ext(self, cr_workdir, oe_builddir, rootfs_dir,
native_sysroot, pseudo):
@@ -324,6 +330,28 @@ class Wic_PartData(Mic_PartData):
self.set_size(rootfs_size)
self.set_source_file(rootfs)
def prepare_rootfs_squashfs(self, cr_workdir, oe_builddir, rootfs_dir,
native_sysroot, pseudo):
"""
Prepare content for a squashfs rootfs partition.
"""
image_rootfs = rootfs_dir
rootfs = "%s/rootfs_%s.%s" % (cr_workdir, self.label ,self.fstype)
squashfs_cmd = "mksquashfs %s %s -noappend" % \
(image_rootfs, rootfs)
rc, out = exec_native_cmd(pseudo + squashfs_cmd, native_sysroot)
# get the rootfs size in the right units for kickstart (Mb)
du_cmd = "du -Lbms %s" % rootfs
rc, out = exec_cmd(du_cmd)
rootfs_size = out.split()[0]
self.size = rootfs_size
self.source_file = rootfs
return 0
def prepare_empty_partition(self, cr_workdir, oe_builddir, native_sysroot):
"""
Prepare an empty partition.
@@ -337,6 +365,9 @@ class Wic_PartData(Mic_PartData):
elif self.fstype.startswith("vfat"):
return self.prepare_empty_partition_vfat(cr_workdir, oe_builddir,
native_sysroot)
elif self.fstype.startswith("squashfs"):
return self.prepare_empty_partition_squashfs(cr_workdir, oe_builddir,
native_sysroot)
def prepare_empty_partition_ext(self, cr_workdir, oe_builddir,
native_sysroot):
@@ -398,6 +429,36 @@ class Wic_PartData(Mic_PartData):
return 0
def prepare_empty_partition_squashfs(self, cr_workdir, oe_builddir,
native_sysroot):
"""
Prepare an empty squashfs partition.
"""
msger.warning("Creating of an empty squashfs %s partition was attempted. " \
"Proceeding as requested." % self.mountpoint)
fs = "%s/fs_%s.%s" % (cr_workdir, self.label, self.fstype)
# it is not possible to create a squashfs without source data,
# thus prepare an empty temp dir that is used as source
tmpdir = tempfile.mkdtemp()
squashfs_cmd = "mksquashfs %s %s -noappend" % \
(tmpdir, fs)
rc, out = exec_native_cmd(squashfs_cmd, native_sysroot)
os.rmdir(tmpdir)
# get the rootfs size in the right units for kickstart (Mb)
du_cmd = "du -Lbms %s" % fs
rc, out = exec_cmd(du_cmd)
fs_size = out.split()[0]
self.size = fs_size
self.source_file = fs
return 0
def prepare_swap_partition(self, cr_workdir, oe_builddir, native_sysroot):
"""
Prepare a swap partition.