| # 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.use_uuid = args.use_uuid |
| self.uuid = args.uuid |
| if args.use_uuid and not self.uuid: |
| self.uuid = str(uuid.uuid4()) |
| |
| 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) |
| self.source_file = "%s/fs.%s" % (cr_workdir, self.fstype) |
| 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) |
| |