summaryrefslogtreecommitdiffstats
path: root/scripts/lib/wic/plugins/source/bootimg-pcbios.py
blob: 6c9f54a89746c2421699161ce574a0c68d56bea6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
#
# Copyright (c) 2014, Intel Corporation.
#
# SPDX-License-Identifier: GPL-2.0-only
#
# DESCRIPTION
# This implements the 'bootimg-pcbios' source plugin class for 'wic'
#
# AUTHORS
# Tom Zanussi <tom.zanussi (at] linux.intel.com>
#

import logging
import os
import re

from wic import WicError
from wic.engine import get_custom_config
from wic.pluginbase import SourcePlugin
from wic.misc import (exec_cmd, exec_native_cmd,
                      get_bitbake_var, BOOTDD_EXTRA_SPACE)

logger = logging.getLogger('wic')

class BootimgPcbiosPlugin(SourcePlugin):
    """
    Create MBR boot partition and install syslinux on it.
    """

    name = 'bootimg-pcbios'

    @classmethod
    def _get_bootimg_dir(cls, bootimg_dir, dirname):
        """
        Check if dirname exists in default bootimg_dir or in STAGING_DIR.
        """
        staging_datadir = get_bitbake_var("STAGING_DATADIR")
        for result in (bootimg_dir, staging_datadir):
            if os.path.exists("%s/%s" % (result, dirname)):
                return result

        # STAGING_DATADIR is expanded with MLPREFIX if multilib is enabled
        # but dependency syslinux is still populated to original STAGING_DATADIR
        nonarch_datadir = re.sub('/[^/]*recipe-sysroot', '/recipe-sysroot', staging_datadir)
        if os.path.exists(os.path.join(nonarch_datadir, dirname)):
            return nonarch_datadir

        raise WicError("Couldn't find correct bootimg_dir, exiting")

    @classmethod
    def do_install_disk(cls, disk, disk_name, creator, workdir, oe_builddir,
                        bootimg_dir, kernel_dir, native_sysroot):
        """
        Called after all partitions have been prepared and assembled into a
        disk image.  In this case, we install the MBR.
        """
        bootimg_dir = cls._get_bootimg_dir(bootimg_dir, 'syslinux')
        mbrfile = "%s/syslinux/" % bootimg_dir
        if creator.ptable_format == 'msdos':
            mbrfile += "mbr.bin"
        elif creator.ptable_format == 'gpt':
            mbrfile += "gptmbr.bin"
        else:
            raise WicError("Unsupported partition table: %s" %
                           creator.ptable_format)

        if not os.path.exists(mbrfile):
            raise WicError("Couldn't find %s.  If using the -e option, do you "
                           "have the right MACHINE set in local.conf?  If not, "
                           "is the bootimg_dir path correct?" % mbrfile)

        full_path = creator._full_path(workdir, disk_name, "direct")
        logger.debug("Installing MBR on disk %s as %s with size %s bytes",
                     disk_name, full_path, disk.min_size)

        dd_cmd = "dd if=%s of=%s conv=notrunc" % (mbrfile, full_path)
        exec_cmd(dd_cmd, native_sysroot)

    @classmethod
    def do_configure_partition(cls, part, source_params, creator, cr_workdir,
                               oe_builddir, bootimg_dir, kernel_dir,
                               native_sysroot):
        """
        Called before do_prepare_partition(), creates syslinux config
        """
        hdddir = "%s/hdd/boot" % cr_workdir

        install_cmd = "install -d %s" % hdddir
        exec_cmd(install_cmd)

        bootloader = creator.ks.bootloader

        custom_cfg = None
        if bootloader.configfile:
            custom_cfg = get_custom_config(bootloader.configfile)
            if custom_cfg:
                # Use a custom configuration for grub
                syslinux_conf = custom_cfg
                logger.debug("Using custom configuration file %s "
                             "for syslinux.cfg", bootloader.configfile)
            else:
                raise WicError("configfile is specified but failed to "
                               "get it from %s." % bootloader.configfile)

        if not custom_cfg:
            # Create syslinux configuration using parameters from wks file
            splash = os.path.join(cr_workdir, "/hdd/boot/splash.jpg")
            if os.path.exists(splash):
                splashline = "menu background splash.jpg"
            else:
                splashline = ""

            syslinux_conf = ""
            syslinux_conf += "PROMPT 0\n"
            syslinux_conf += "TIMEOUT " + str(bootloader.timeout) + "\n"
            syslinux_conf += "\n"
            syslinux_conf += "ALLOWOPTIONS 1\n"
            syslinux_conf += "SERIAL 0 115200\n"
            syslinux_conf += "\n"
            if splashline:
                syslinux_conf += "%s\n" % splashline
            syslinux_conf += "DEFAULT boot\n"
            syslinux_conf += "LABEL boot\n"

            kernel = "/vmlinuz"
            syslinux_conf += "KERNEL " + kernel + "\n"

            syslinux_conf += "APPEND label=boot root=%s %s\n" % \
                             (creator.rootdev, bootloader.append)

        logger.debug("Writing syslinux config %s/hdd/boot/syslinux.cfg",
                     cr_workdir)
        cfg = open("%s/hdd/boot/syslinux.cfg" % cr_workdir, "w")
        cfg.write(syslinux_conf)
        cfg.close()

    @classmethod
    def do_prepare_partition(cls, part, source_params, creator, cr_workdir,
                             oe_builddir, bootimg_dir, kernel_dir,
                             rootfs_dir, native_sysroot):
        """
        Called to do the actual content population for a partition i.e. it
        'prepares' the partition to be incorporated into the image.
        In this case, prepare content for legacy bios boot partition.
        """
        bootimg_dir = cls._get_bootimg_dir(bootimg_dir, 'syslinux')

        staging_kernel_dir = kernel_dir

        hdddir = "%s/hdd/boot" % cr_workdir

        cmds = ("install -m 0644 %s/bzImage %s/vmlinuz" %
                (staging_kernel_dir, hdddir),
                "install -m 444 %s/syslinux/ldlinux.sys %s/ldlinux.sys" %
                (bootimg_dir, hdddir),
                "install -m 0644 %s/syslinux/vesamenu.c32 %s/vesamenu.c32" %
                (bootimg_dir, hdddir),
                "install -m 444 %s/syslinux/libcom32.c32 %s/libcom32.c32" %
                (bootimg_dir, hdddir),
                "install -m 444 %s/syslinux/libutil.c32 %s/libutil.c32" %
                (bootimg_dir, hdddir))

        for install_cmd in cmds:
            exec_cmd(install_cmd)

        du_cmd = "du -bks %s" % hdddir
        out = exec_cmd(du_cmd)
        blocks = int(out.split()[0])

        extra_blocks = part.get_extra_block_count(blocks)

        if extra_blocks < BOOTDD_EXTRA_SPACE:
            extra_blocks = BOOTDD_EXTRA_SPACE

        blocks += extra_blocks

        logger.debug("Added %d extra blocks to %s to get to %d total blocks",
                     extra_blocks, part.mountpoint, blocks)

        # dosfs image, created by mkdosfs
        bootimg = "%s/boot%s.img" % (cr_workdir, part.lineno)

        dosfs_cmd = "mkdosfs -n boot -i %s -S 512 -C %s %d" % \
                    (part.fsuuid, bootimg, blocks)
        exec_native_cmd(dosfs_cmd, native_sysroot)

        mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (bootimg, hdddir)
        exec_native_cmd(mcopy_cmd, native_sysroot)

        syslinux_cmd = "syslinux %s" % bootimg
        exec_native_cmd(syslinux_cmd, native_sysroot)

        chmod_cmd = "chmod 644 %s" % bootimg
        exec_cmd(chmod_cmd)

        du_cmd = "du -Lbks %s" % bootimg
        out = exec_cmd(du_cmd)
        bootimg_size = out.split()[0]

        part.size = int(bootimg_size)
        part.source_file = bootimg