| # |
| # Copyright (c) 2013-2016 Intel Corporation. |
| # |
| # SPDX-License-Identifier: GPL-2.0-only |
| # |
| # 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 logging |
| import os |
| import uuid |
| |
| from wic import WicError |
| from wic.misc import exec_cmd, exec_native_cmd, get_bitbake_var |
| from wic.pluginbase import PluginMgr |
| |
| logger = logging.getLogger('wic') |
| |
| class Partition(): |
| |
| def __init__(self, args, lineno): |
| self.args = args |
| self.active = args.active |
| self.align = args.align |
| self.disk = args.disk |
| self.device = None |
| self.extra_space = args.extra_space |
| self.exclude_path = args.exclude_path |
| self.include_path = args.include_path |
| self.change_directory = args.change_directory |
| self.fsopts = args.fsopts |
| self.fstype = args.fstype |
| self.label = args.label |
| self.use_label = args.use_label |
| self.mkfs_extraopts = args.mkfs_extraopts |
| self.mountpoint = args.mountpoint |
| self.no_table = args.no_table |
| self.num = None |
| self.offset = args.offset |
| self.overhead_factor = args.overhead_factor |
| self.part_name = args.part_name |
| self.part_type = args.part_type |
| self.rootfs_dir = args.rootfs_dir |
| self.size = args.size |
| self.fixed_size = args.fixed_size |
| self.source = args.source |
| self.sourceparams = args.sourceparams |
| self.system_id = args.system_id |
| self.use_uuid = args.use_uuid |
| self.uuid = args.uuid |
| self.fsuuid = args.fsuuid |
| self.type = args.type |
| self.no_fstab_update = args.no_fstab_update |
| self.updated_fstab_path = None |
| self.has_fstab = False |
| self.update_fstab_in_rootfs = False |
| |
| self.lineno = lineno |
| self.source_file = "" |
| |
| 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. |
| """ |
| logger.debug("Requested partition size for %s: %d", |
| self.mountpoint, self.size) |
| |
| if not self.size: |
| return 0 |
| |
| requested_blocks = self.size |
| |
| logger.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 get_rootfs_size(self, actual_rootfs_size=0): |
| """ |
| Calculate the required size of rootfs taking into consideration |
| --size/--fixed-size flags as well as overhead and extra space, as |
| specified in kickstart file. Raises an error if the |
| `actual_rootfs_size` is larger than fixed-size rootfs. |
| |
| """ |
| if self.fixed_size: |
| rootfs_size = self.fixed_size |
| if actual_rootfs_size > rootfs_size: |
| raise WicError("Actual rootfs size (%d kB) is larger than " |
| "allowed size %d kB" % |
| (actual_rootfs_size, rootfs_size)) |
| else: |
| 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 = int(rootfs_size * self.overhead_factor) |
| |
| logger.debug("Added %d extra blocks to %s to get to %d total blocks", |
| extra_blocks, self.mountpoint, rootfs_size) |
| |
| return rootfs_size |
| |
| @property |
| def disk_size(self): |
| """ |
| Obtain on-disk size of partition taking into consideration |
| --size/--fixed-size options. |
| |
| """ |
| return self.fixed_size if self.fixed_size else self.size |
| |
| def prepare(self, creator, cr_workdir, oe_builddir, rootfs_dir, |
| bootimg_dir, kernel_dir, native_sysroot, updated_fstab_path): |
| """ |
| Prepare content for individual partitions, depending on |
| partition command parameters. |
| """ |
| self.updated_fstab_path = updated_fstab_path |
| if self.updated_fstab_path and not (self.fstype.startswith("ext") or self.fstype == "msdos"): |
| self.update_fstab_in_rootfs = True |
| |
| if not self.source: |
| if not self.size and not self.fixed_size: |
| raise WicError("The %s partition has a size of zero. Please " |
| "specify a non-zero --size/--fixed-size for that " |
| "partition." % self.mountpoint) |
| |
| if self.fstype == "swap": |
| self.prepare_swap_partition(cr_workdir, oe_builddir, |
| native_sysroot) |
| self.source_file = "%s/fs.%s" % (cr_workdir, self.fstype) |
| else: |
| if self.fstype in ('squashfs', 'erofs'): |
| raise WicError("It's not possible to create empty %s " |
| "partition '%s'" % (self.fstype, self.mountpoint)) |
| |
| rootfs = "%s/fs_%s.%s.%s" % (cr_workdir, self.label, |
| self.lineno, self.fstype) |
| if os.path.isfile(rootfs): |
| os.remove(rootfs) |
| |
| prefix = "ext" if self.fstype.startswith("ext") else self.fstype |
| method = getattr(self, "prepare_empty_partition_" + prefix) |
| method(rootfs, oe_builddir, native_sysroot) |
| self.source_file = rootfs |
| return |
| |
| plugins = PluginMgr.get_plugins('source') |
| |
| if self.source not in plugins: |
| raise WicError("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)) |
| |
| srcparams_dict = {} |
| if self.sourceparams: |
| # Split sourceparams string of the form key1=val1[,key2=val2,...] |
| # into a dict. Also accepts valueless keys i.e. without = |
| splitted = self.sourceparams.split(',') |
| srcparams_dict = dict((par.split('=', 1) + [None])[:2] for par in splitted if par) |
| |
| plugin = PluginMgr.get_plugins('source')[self.source] |
| plugin.do_configure_partition(self, srcparams_dict, creator, |
| cr_workdir, oe_builddir, bootimg_dir, |
| kernel_dir, native_sysroot) |
| plugin.do_stage_partition(self, srcparams_dict, creator, |
| cr_workdir, oe_builddir, bootimg_dir, |
| kernel_dir, native_sysroot) |
| plugin.do_prepare_partition(self, srcparams_dict, creator, |
| cr_workdir, oe_builddir, bootimg_dir, |
| kernel_dir, rootfs_dir, native_sysroot) |
| plugin.do_post_partition(self, srcparams_dict, creator, |
| cr_workdir, oe_builddir, bootimg_dir, |
| kernel_dir, rootfs_dir, native_sysroot) |
| |
| # further processing required Partition.size to be an integer, make |
| # sure that it is one |
| if not isinstance(self.size, int): |
| raise WicError("Partition %s internal size is not an integer. " |
| "This a bug in source plugin %s and needs to be fixed." % |
| (self.mountpoint, self.source)) |
| |
| if self.fixed_size and self.size > self.fixed_size: |
| raise WicError("File system image of partition %s is " |
| "larger (%d kB) than its allowed size %d kB" % |
| (self.mountpoint, self.size, self.fixed_size)) |
| |
| def prepare_rootfs(self, cr_workdir, oe_builddir, rootfs_dir, |
| native_sysroot, real_rootfs = True, pseudo_dir = None): |
| """ |
| Prepare content for a rootfs partition i.e. create a partition |
| and fill it from a /rootfs dir. |
| |
| Currently handles ext2/3/4, btrfs, vfat and squashfs. |
| """ |
| |
| rootfs = "%s/rootfs_%s.%s.%s" % (cr_workdir, self.label, |
| self.lineno, self.fstype) |
| if os.path.isfile(rootfs): |
| os.remove(rootfs) |
| |
| p_prefix = os.environ.get("PSEUDO_PREFIX", "%s/usr" % native_sysroot) |
| if (pseudo_dir): |
| # Canonicalize the ignore paths. This corresponds to |
| # calling oe.path.canonicalize(), which is used in bitbake.conf. |
| ignore_paths = [rootfs] + (get_bitbake_var("PSEUDO_IGNORE_PATHS") or "").split(",") |
| canonical_paths = [] |
| for path in ignore_paths: |
| if "$" not in path: |
| trailing_slash = path.endswith("/") and "/" or "" |
| canonical_paths.append(os.path.realpath(path) + trailing_slash) |
| ignore_paths = ",".join(canonical_paths) |
| |
| pseudo = "export PSEUDO_PREFIX=%s;" % p_prefix |
| pseudo += "export PSEUDO_LOCALSTATEDIR=%s;" % pseudo_dir |
| pseudo += "export PSEUDO_PASSWD=%s;" % rootfs_dir |
| pseudo += "export PSEUDO_NOSYMLINKEXP=1;" |
| pseudo += "export PSEUDO_IGNORE_PATHS=%s;" % ignore_paths |
| pseudo += "%s " % get_bitbake_var("FAKEROOTCMD") |
| else: |
| pseudo = None |
| |
| if not self.size and real_rootfs: |
| # The rootfs size is not set in .ks file so try to get it |
| # from bitbake variable |
| rsize_bb = get_bitbake_var('ROOTFS_SIZE') |
| rdir = get_bitbake_var('IMAGE_ROOTFS') |
| if rsize_bb and rdir == rootfs_dir: |
| # Bitbake variable ROOTFS_SIZE is calculated in |
| # Image._get_rootfs_size method from meta/lib/oe/image.py |
| # using IMAGE_ROOTFS_SIZE, IMAGE_ROOTFS_ALIGNMENT, |
| # IMAGE_OVERHEAD_FACTOR and IMAGE_ROOTFS_EXTRA_SPACE |
| self.size = int(round(float(rsize_bb))) |
| else: |
| # Bitbake variable ROOTFS_SIZE is not defined so compute it |
| # from the rootfs_dir size using the same logic found in |
| # get_rootfs_size() from meta/classes/image.bbclass |
| du_cmd = "du -ks %s" % rootfs_dir |
| out = exec_cmd(du_cmd) |
| self.size = int(out.split()[0]) |
| |
| prefix = "ext" if self.fstype.startswith("ext") else self.fstype |
| method = getattr(self, "prepare_rootfs_" + prefix) |
| method(rootfs, cr_workdir, 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 = int(out.split()[0]) |
| |
| def prepare_rootfs_ext(self, rootfs, cr_workdir, 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]) |
| |
| rootfs_size = self.get_rootfs_size(actual_rootfs_size) |
| |
| with open(rootfs, 'w') as sparse: |
| os.ftruncate(sparse.fileno(), rootfs_size * 1024) |
| |
| extraopts = self.mkfs_extraopts or "-F -i 8192" |
| |
| label_str = "" |
| if self.label: |
| label_str = "-L %s" % self.label |
| |
| mkfs_cmd = "mkfs.%s %s %s %s -U %s -d %s" % \ |
| (self.fstype, extraopts, rootfs, label_str, self.fsuuid, rootfs_dir) |
| exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo) |
| |
| if self.updated_fstab_path and self.has_fstab and not self.no_fstab_update: |
| debugfs_script_path = os.path.join(cr_workdir, "debugfs_script") |
| with open(debugfs_script_path, "w") as f: |
| f.write("cd etc\n") |
| f.write("rm fstab\n") |
| f.write("write %s fstab\n" % (self.updated_fstab_path)) |
| debugfs_cmd = "debugfs -w -f %s %s" % (debugfs_script_path, rootfs) |
| exec_native_cmd(debugfs_cmd, native_sysroot) |
| |
| mkfs_cmd = "fsck.%s -pvfD %s" % (self.fstype, rootfs) |
| exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo) |
| |
| self.check_for_Y2038_problem(rootfs, native_sysroot) |
| |
| def prepare_rootfs_btrfs(self, rootfs, cr_workdir, oe_builddir, rootfs_dir, |
| native_sysroot, pseudo): |
| """ |
| Prepare content for a btrfs rootfs partition. |
| """ |
| du_cmd = "du -ks %s" % rootfs_dir |
| out = exec_cmd(du_cmd) |
| actual_rootfs_size = int(out.split()[0]) |
| |
| rootfs_size = self.get_rootfs_size(actual_rootfs_size) |
| |
| with open(rootfs, 'w') as sparse: |
| os.ftruncate(sparse.fileno(), rootfs_size * 1024) |
| |
| label_str = "" |
| if self.label: |
| label_str = "-L %s" % self.label |
| |
| mkfs_cmd = "mkfs.%s -b %d -r %s %s %s -U %s %s" % \ |
| (self.fstype, rootfs_size * 1024, rootfs_dir, label_str, |
| self.mkfs_extraopts, self.fsuuid, rootfs) |
| exec_native_cmd(mkfs_cmd, native_sysroot, pseudo=pseudo) |
| |
| def prepare_rootfs_msdos(self, rootfs, cr_workdir, oe_builddir, rootfs_dir, |
| native_sysroot, pseudo): |
| """ |
| Prepare content for a msdos/vfat rootfs partition. |
| """ |
| du_cmd = "du -bks %s" % rootfs_dir |
| out = exec_cmd(du_cmd) |
| blocks = int(out.split()[0]) |
| |
| rootfs_size = self.get_rootfs_size(blocks) |
| |
| label_str = "-n boot" |
| if self.label: |
| label_str = "-n %s" % self.label |
| |
| size_str = "" |
| |
| extraopts = self.mkfs_extraopts or '-S 512' |
| |
| dosfs_cmd = "mkdosfs %s -i %s %s %s -C %s %d" % \ |
| (label_str, self.fsuuid, size_str, extraopts, rootfs, |
| rootfs_size) |
| exec_native_cmd(dosfs_cmd, native_sysroot) |
| |
| mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (rootfs, rootfs_dir) |
| exec_native_cmd(mcopy_cmd, native_sysroot) |
| |
| if self.updated_fstab_path and self.has_fstab and not self.no_fstab_update: |
| mcopy_cmd = "mcopy -i %s %s ::/etc/fstab" % (rootfs, self.updated_fstab_path) |
| exec_native_cmd(mcopy_cmd, native_sysroot) |
| |
| chmod_cmd = "chmod 644 %s" % rootfs |
| exec_cmd(chmod_cmd) |
| |
| prepare_rootfs_vfat = prepare_rootfs_msdos |
| |
| def prepare_rootfs_squashfs(self, rootfs, cr_workdir, oe_builddir, rootfs_dir, |
| native_sysroot, pseudo): |
| """ |
| Prepare content for a squashfs rootfs partition. |
| """ |
| extraopts = self.mkfs_extraopts or '-noappend' |
| squashfs_cmd = "mksquashfs %s %s %s" % \ |
| (rootfs_dir, rootfs, extraopts) |
| exec_native_cmd(squashfs_cmd, native_sysroot, pseudo=pseudo) |
| |
| def prepare_rootfs_erofs(self, rootfs, cr_workdir, oe_builddir, rootfs_dir, |
| native_sysroot, pseudo): |
| """ |
| Prepare content for a erofs rootfs partition. |
| """ |
| extraopts = self.mkfs_extraopts or '' |
| erofs_cmd = "mkfs.erofs %s -U %s %s %s" % \ |
| (extraopts, self.fsuuid, rootfs, rootfs_dir) |
| exec_native_cmd(erofs_cmd, native_sysroot, pseudo=pseudo) |
| |
| def prepare_empty_partition_ext(self, rootfs, oe_builddir, |
| native_sysroot): |
| """ |
| Prepare an empty ext2/3/4 partition. |
| """ |
| size = self.disk_size |
| with open(rootfs, 'w') as sparse: |
| os.ftruncate(sparse.fileno(), size * 1024) |
| |
| extraopts = self.mkfs_extraopts or "-i 8192" |
| |
| label_str = "" |
| if self.label: |
| label_str = "-L %s" % self.label |
| |
| mkfs_cmd = "mkfs.%s -F %s %s -U %s %s" % \ |
| (self.fstype, extraopts, label_str, self.fsuuid, rootfs) |
| exec_native_cmd(mkfs_cmd, native_sysroot) |
| |
| self.check_for_Y2038_problem(rootfs, native_sysroot) |
| |
| def prepare_empty_partition_btrfs(self, rootfs, oe_builddir, |
| native_sysroot): |
| """ |
| Prepare an empty btrfs partition. |
| """ |
| size = self.disk_size |
| with open(rootfs, 'w') as sparse: |
| os.ftruncate(sparse.fileno(), size * 1024) |
| |
| label_str = "" |
| if self.label: |
| label_str = "-L %s" % self.label |
| |
| mkfs_cmd = "mkfs.%s -b %d %s -U %s %s %s" % \ |
| (self.fstype, self.size * 1024, label_str, self.fsuuid, |
| self.mkfs_extraopts, rootfs) |
| exec_native_cmd(mkfs_cmd, native_sysroot) |
| |
| def prepare_empty_partition_msdos(self, rootfs, oe_builddir, |
| native_sysroot): |
| """ |
| Prepare an empty vfat partition. |
| """ |
| blocks = self.disk_size |
| |
| label_str = "-n boot" |
| if self.label: |
| label_str = "-n %s" % self.label |
| |
| size_str = "" |
| |
| extraopts = self.mkfs_extraopts or '-S 512' |
| |
| dosfs_cmd = "mkdosfs %s -i %s %s %s -C %s %d" % \ |
| (label_str, self.fsuuid, extraopts, size_str, rootfs, |
| blocks) |
| |
| exec_native_cmd(dosfs_cmd, native_sysroot) |
| |
| chmod_cmd = "chmod 644 %s" % rootfs |
| exec_cmd(chmod_cmd) |
| |
| prepare_empty_partition_vfat = prepare_empty_partition_msdos |
| |
| def prepare_swap_partition(self, cr_workdir, oe_builddir, native_sysroot): |
| """ |
| Prepare a swap partition. |
| """ |
| path = "%s/fs.%s" % (cr_workdir, self.fstype) |
| |
| with open(path, 'w') as sparse: |
| os.ftruncate(sparse.fileno(), self.size * 1024) |
| |
| label_str = "" |
| if self.label: |
| label_str = "-L %s" % self.label |
| |
| mkswap_cmd = "mkswap %s -U %s %s" % (label_str, self.fsuuid, path) |
| exec_native_cmd(mkswap_cmd, native_sysroot) |
| |
| def check_for_Y2038_problem(self, rootfs, native_sysroot): |
| """ |
| Check if the filesystem is affected by the Y2038 problem |
| (Y2038 problem = 32 bit time_t overflow in January 2038) |
| """ |
| def get_err_str(part): |
| err = "The {} filesystem {} has no Y2038 support." |
| if part.mountpoint: |
| args = [part.fstype, "mounted at %s" % part.mountpoint] |
| elif part.label: |
| args = [part.fstype, "labeled '%s'" % part.label] |
| elif part.part_name: |
| args = [part.fstype, "in partition '%s'" % part.part_name] |
| else: |
| args = [part.fstype, "in partition %s" % part.num] |
| return err.format(*args) |
| |
| # ext2 and ext3 are always affected by the Y2038 problem |
| if self.fstype in ["ext2", "ext3"]: |
| logger.warn(get_err_str(self)) |
| return |
| |
| ret, out = exec_native_cmd("dumpe2fs %s" % rootfs, native_sysroot) |
| |
| # if ext4 is affected by the Y2038 problem depends on the inode size |
| for line in out.splitlines(): |
| if line.startswith("Inode size:"): |
| size = int(line.split(":")[1].strip()) |
| if size < 256: |
| logger.warn("%s Inodes (of size %d) are too small." % |
| (get_err_str(self), size)) |
| break |
| |