[wic][PATCH 1/9] wic: add partition module

Ed Bartosh
2016-01-14T14:11:10Z

Copied partition-related API from kickstart/custom_commands/partition.py
to separate module in preparation for removal of all
pykickstart related code.

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
---
scripts/lib/wic/partition.py | 410 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 410 insertions(+)
create mode 100644 scripts/lib/wic/partition.py

diff --git a/scripts/lib/wic/partition.py b/scripts/lib/wic/partition.py
new file mode 100644
index 0000000..9bb1a0a
--- /dev/null
+++ b/scripts/lib/wic/partition.py
@@ -0,0 +1,410 @@
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+#
+# Copyright (c) 2013-2016 Intel Corporation.
+# All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# DESCRIPTION
+# This module provides the OpenEmbedded partition object definitions.
+#
+# AUTHORS
+# Tom Zanussi <tom.zanussi (at] linux.intel.com>
+# Ed Bartosh <ed.bartosh> (at] linux.intel.com>
+
+import os
+import tempfile
+import uuid
+
+from wic.utils.oe.misc import msger, parse_sourceparams
+from wic.utils.oe.misc import exec_cmd, exec_native_cmd
+from wic.plugin import pluginmgr
+
+partition_methods = {
+ "do_stage_partition":None,
+ "do_prepare_partition":None,
+ "do_configure_partition":None,
+}
+
+class Partition(object):
+
+ def __init__(self, args, lineno):
+ self.args = args
+ self.active = args.active
+ self.align = args.align
+ self.disk = args.disk
+ self.extra_space = args.extra_space
+ self.fsopts = args.fsopts
+ self.fstype = args.fstype
+ self.label = args.label
+ self.mountpoint = args.mountpoint
+ self.no_table = args.no_table
+ self.overhead_factor = args.overhead_factor
+ self.part_type = args.part_type
+ self.rootfs_dir = args.rootfs_dir
+ self.size = args.size
+ self.source = args.source
+ self.sourceparams = args.sourceparams
+ self.uuid = args.uuid
+
+ self.lineno = lineno
+ self.source_file = ""
+ self.sourceparams_dict = {}
+
+ def get_extra_block_count(self, current_blocks):
+ """
+ The --size param is reflected in self.size (in kB), and we already
+ have current_blocks (1k) blocks, calculate and return the
+ number of (1k) blocks we need to add to get to --size, 0 if
+ we're already there or beyond.
+ """
+ msger.debug("Requested partition size for %s: %d" % \
+ (self.mountpoint, self.size))
+
+ if not self.size:
+ return 0
+
+ requested_blocks = self.size
+
+ msger.debug("Requested blocks %d, current_blocks %d" % \
+ (requested_blocks, current_blocks))
+
+ if requested_blocks > current_blocks:
+ return requested_blocks - current_blocks
+ else:
+ return 0
+
+ def prepare(self, creator, cr_workdir, oe_builddir, rootfs_dir,
+ bootimg_dir, kernel_dir, native_sysroot):
+ """
+ Prepare content for individual partitions, depending on
+ partition command parameters.
+ """
+ if self.sourceparams:
+ self.sourceparams_dict = parse_sourceparams(self.sourceparams)
+
+ if not self.source:
+ if not self.size:
+ msger.error("The %s partition has a size of zero. Please "
+ "specify a non-zero --size for that partition." % \
+ self.mountpoint)
+ if self.fstype and self.fstype == "swap":
+ self.prepare_swap_partition(cr_workdir, oe_builddir,
+ native_sysroot)
+ elif self.fstype:
+ rootfs = "%s/fs_%s.%s.%s" % (cr_workdir, self.label,
+ self.lineno, self.fstype)
+ if os.path.isfile(rootfs):
+ os.remove(rootfs)
+ for prefix in ("ext", "btrfs", "vfat", "squashfs"):
+ if self.fstype.startswith(prefix):
+ method = getattr(self,
+ "prepare_empty_partition_" + prefix)
+ method(rootfs, oe_builddir, native_sysroot)
+ self.source_file = rootfs
+ break
+ return
+
+ plugins = pluginmgr.get_source_plugins()
+
+ if self.source not in plugins:
+ msger.error("The '%s' --source specified for %s doesn't exist.\n\t"
+ "See 'wic list source-plugins' for a list of available"
+ " --sources.\n\tSee 'wic help source-plugins' for "
+ "details on adding a new source plugin." % \
+ (self.source, self.mountpoint))
+
+ self._source_methods = pluginmgr.get_source_plugin_methods(\
+ self.source, partition_methods)
+ self._source_methods["do_configure_partition"](self, self.sourceparams_dict,
+ creator, cr_workdir,
+ oe_builddir,
+ bootimg_dir,
+ kernel_dir,
+ native_sysroot)
+ self._source_methods["do_stage_partition"](self, self.sourceparams_dict,
+ creator, cr_workdir,
+ oe_builddir,
+ bootimg_dir, kernel_dir,
+ native_sysroot)
+ self._source_methods["do_prepare_partition"](self, self.sourceparams_dict,
+ creator, cr_workdir,
+ oe_builddir,
+ bootimg_dir, kernel_dir, rootfs_dir,
+ native_sysroot)
+
+ def prepare_rootfs_from_fs_image(self, cr_workdir, oe_builddir,
+ rootfs_dir):
+ """
+ Handle an already-created partition e.g. xxx.ext3
+ """
+ rootfs = oe_builddir
+ du_cmd = "du -Lbks %s" % rootfs
+ out = exec_cmd(du_cmd)
+ rootfs_size = out.split()[0]
+
+ self.size = rootfs_size
+ self.source_file = rootfs
+
+ def prepare_rootfs(self, cr_workdir, oe_builddir, rootfs_dir,
+ native_sysroot):
+ """
+ Prepare content for a rootfs partition i.e. create a partition
+ and fill it from a /rootfs dir.
+
+ Currently handles ext2/3/4, btrfs and vfat.
+ """
+ p_prefix = os.environ.get("PSEUDO_PREFIX", "%s/usr" % native_sysroot)
+ p_localstatedir = os.environ.get("PSEUDO_LOCALSTATEDIR",
+ "%s/../pseudo" % rootfs_dir)
+ p_passwd = os.environ.get("PSEUDO_PASSWD", rootfs_dir)
+ p_nosymlinkexp = os.environ.get("PSEUDO_NOSYMLINKEXP", "1")
+ pseudo = "export PSEUDO_PREFIX=%s;" % p_prefix
+ pseudo += "export PSEUDO_LOCALSTATEDIR=%s;" % p_localstatedir
+ pseudo += "export PSEUDO_PASSWD=%s;" % p_passwd
+ pseudo += "export PSEUDO_NOSYMLINKEXP=%s;" % p_nosymlinkexp
+ pseudo += "%s/usr/bin/pseudo " % native_sysroot
+
+ rootfs = "%s/rootfs_%s.%s.%s" % (cr_workdir, self.label,
+ self.lineno, self.fstype)
+ if os.path.isfile(rootfs):
+ os.remove(rootfs)
+
+ for prefix in ("ext", "btrfs", "vfat", "squashfs"):
+ if self.fstype.startswith(prefix):
+ method = getattr(self, "prepare_rootfs_" + prefix)
+ method(rootfs, oe_builddir, rootfs_dir, native_sysroot, pseudo)
+
+ self.source_file = rootfs
+
+ # get the rootfs size in the right units for kickstart (kB)
+ du_cmd = "du -Lbks %s" % rootfs
+ out = exec_cmd(du_cmd)
+ self.size = out.split()[0]
+
+ break
+
+ def prepare_rootfs_ext(self, rootfs, oe_builddir, rootfs_dir,
+ native_sysroot, pseudo):
+ """
+ Prepare content for an ext2/3/4 rootfs partition.
+ """
+ du_cmd = "du -ks %s" % rootfs_dir
+ out = exec_cmd(du_cmd)
+ actual_rootfs_size = int(out.split()[0])
+
+ extra_blocks = self.get_extra_block_count(actual_rootfs_size)
+ if extra_blocks < self.extra_space:
+ extra_blocks = self.extra_space
+
+ rootfs_size = actual_rootfs_size + extra_blocks
+ rootfs_size *= self.overhead_factor
+
+ msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
+ (extra_blocks, self.mountpoint, rootfs_size))
+
+ dd_cmd = "dd if=/dev/zero of=%s bs=1024 seek=%d count=0 bs=1k" % \
+ (rootfs, rootfs_size)
+ exec_cmd(dd_cmd)
+
+ extra_imagecmd = "-i 8192"
+
+ label_str = ""
+ if self.label:
+ label_str = "-L %s" % self.label
+
+ mkfs_cmd = "mkfs.%s -F %s %s %s -d %s" % \
+ (self.fstype, extra_imagecmd, rootfs, label_str, rootfs_dir)
+ exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
+
+ def prepare_rootfs_btrfs(self, rootfs, oe_builddir, rootfs_dir,
+ native_sysroot, pseudo):
+ """
+ Prepare content for a btrfs rootfs partition.
+
+ Currently handles ext2/3/4 and btrfs.
+ """
+ du_cmd = "du -ks %s" % rootfs_dir
+ out = exec_cmd(du_cmd)
+ actual_rootfs_size = int(out.split()[0])
+
+ extra_blocks = self.get_extra_block_count(actual_rootfs_size)
+ if extra_blocks < self.extra_space:
+ extra_blocks = self.extra_space
+
+ rootfs_size = actual_rootfs_size + extra_blocks
+ rootfs_size *= self.overhead_factor
+
+ msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
+ (extra_blocks, self.mountpoint, rootfs_size))
+
+ dd_cmd = "dd if=/dev/zero of=%s bs=1024 seek=%d count=0 bs=1k" % \
+ (rootfs, rootfs_size)
+ exec_cmd(dd_cmd)
+
+ label_str = ""
+ if self.label:
+ label_str = "-L %s" % self.label
+
+ mkfs_cmd = "mkfs.%s -b %d -r %s %s %s" % \
+ (self.fstype, rootfs_size * 1024, rootfs_dir, label_str, rootfs)
+ exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo)
+
+ def prepare_rootfs_vfat(self, rootfs, oe_builddir, rootfs_dir,
+ native_sysroot, pseudo):
+ """
+ Prepare content for a vfat rootfs partition.
+ """
+ du_cmd = "du -bks %s" % rootfs_dir
+ out = exec_cmd(du_cmd)
+ blocks = int(out.split()[0])
+
+ extra_blocks = self.get_extra_block_count(blocks)
+ if extra_blocks < self.extra_space:
+ extra_blocks = self.extra_space
+
+ blocks += extra_blocks
+
+ msger.debug("Added %d extra blocks to %s to get to %d total blocks" % \
+ (extra_blocks, self.mountpoint, blocks))
+
+ # Ensure total sectors is an integral number of sectors per
+ # track or mcopy will complain. Sectors are 512 bytes, and we
+ # generate images with 32 sectors per track. This calculation
+ # is done in blocks, thus the mod by 16 instead of 32. Apply
+ # sector count fix only when needed.
+ if blocks % 16 != 0:
+ blocks += (16 - (blocks % 16))
+
+ label_str = "-n boot"
+ if self.label:
+ label_str = "-n %s" % self.label
+
+ dosfs_cmd = "mkdosfs %s -S 512 -C %s %d" % (label_str, rootfs, blocks)
+ exec_native_cmd(dosfs_cmd, native_sysroot)
+
+ mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (rootfs, rootfs_dir)
+ exec_native_cmd(mcopy_cmd, native_sysroot)
+
+ chmod_cmd = "chmod 644 %s" % rootfs
+ exec_cmd(chmod_cmd)
+
+ def prepare_rootfs_squashfs(self, rootfs, oe_builddir, rootfs_dir,
+ native_sysroot, pseudo):
+ """
+ Prepare content for a squashfs rootfs partition.
+ """
+ squashfs_cmd = "mksquashfs %s %s -noappend" % \
+ (rootfs_dir, rootfs)
+ exec_native_cmd(squashfs_cmd, native_sysroot, pseudo=pseudo)
+
+ def prepare_empty_partition_ext(self, rootfs, oe_builddir,
+ native_sysroot):
+ """
+ Prepare an empty ext2/3/4 partition.
+ """
+ dd_cmd = "dd if=/dev/zero of=%s bs=1k seek=%d count=0" % \
+ (rootfs, self.size)
+ exec_cmd(dd_cmd)
+
+ extra_imagecmd = "-i 8192"
+
+ label_str = ""
+ if self.label:
+ label_str = "-L %s" % self.label
+
+ mkfs_cmd = "mkfs.%s -F %s %s %s" % \
+ (self.fstype, extra_imagecmd, label_str, rootfs)
+ exec_native_cmd(mkfs_cmd, native_sysroot)
+
+ def prepare_empty_partition_btrfs(self, rootfs, oe_builddir,
+ native_sysroot):
+ """
+ Prepare an empty btrfs partition.
+ """
+ dd_cmd = "dd if=/dev/zero of=%s bs=1k seek=%d count=0" % \
+ (rootfs, self.size)
+ exec_cmd(dd_cmd)
+
+ label_str = ""
+ if self.label:
+ label_str = "-L %s" % self.label
+
+ mkfs_cmd = "mkfs.%s -b %d %s %s" % \
+ (self.fstype, self.size * 1024, label_str, rootfs)
+ exec_native_cmd(mkfs_cmd, native_sysroot)
+
+ def prepare_empty_partition_vfat(self, rootfs, oe_builddir,
+ native_sysroot):
+ """
+ Prepare an empty vfat partition.
+ """
+ blocks = self.size
+
+ label_str = "-n boot"
+ if self.label:
+ label_str = "-n %s" % self.label
+
+ dosfs_cmd = "mkdosfs %s -S 512 -C %s %d" % (label_str, rootfs, blocks)
+ exec_native_cmd(dosfs_cmd, native_sysroot)
+
+ chmod_cmd = "chmod 644 %s" % rootfs
+ exec_cmd(chmod_cmd)
+
+ 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)
+
+ path = "%s/fs_%s.%s" % (cr_workdir, self.label, self.fstype)
+ os.path.isfile(path) and os.remove(path)
+
+ # 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, path)
+ exec_native_cmd(squashfs_cmd, native_sysroot)
+
+ os.rmdir(tmpdir)
+
+ # get the rootfs size in the right units for kickstart (kB)
+ du_cmd = "du -Lbks %s" % path
+ out = exec_cmd(du_cmd)
+ fs_size = out.split()[0]
+
+ self.size = fs_size
+
+ def prepare_swap_partition(self, cr_workdir, oe_builddir, native_sysroot):
+ """
+ Prepare a swap partition.
+ """
+ path = "%s/fs.%s" % (cr_workdir, self.fstype)
+
+ dd_cmd = "dd if=/dev/zero of=%s bs=1k seek=%d count=0" % \
+ (path, self.size)
+ exec_cmd(dd_cmd)
+
+ import uuid
+ label_str = ""
+ if self.label:
+ label_str = "-L %s" % self.label
+ mkswap_cmd = "mkswap %s -U %s %s" % (label_str, str(uuid.uuid1()), path)
+ exec_native_cmd(mkswap_cmd, native_sysroot)
+
--
2.1.4