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1# Copyright (C) 2004, Advanced Micro Devices, Inc. All Rights Reserved
2# Released under the MIT license (see packages/COPYING)
3
4# Creates a bootable image using syslinux, your kernel and an optional
5# initrd
6
7#
8# End result is two things:
9#
10# 1. A .hddimg file which is an msdos filesystem containing syslinux, a kernel,
11# an initrd and a rootfs image. These can be written to harddisks directly and
12# also booted on USB flash disks (write them there with dd).
13#
14# 2. A CD .iso image
15
16# Boot process is that the initrd will boot and process which label was selected
17# in syslinux. Actions based on the label are then performed (e.g. installing to
18# an hdd)
19
20# External variables (also used by syslinux.bbclass)
21# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
22# ${HDDIMG_ID} - FAT image volume-id
23# ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
24
25inherit live-vm-common image-artifact-names
26
27do_bootimg[depends] += "dosfstools-native:do_populate_sysroot \
28 mtools-native:do_populate_sysroot \
29 cdrtools-native:do_populate_sysroot \
30 virtual/kernel:do_deploy \
31 ${MLPREFIX}syslinux:do_populate_sysroot \
32 syslinux-native:do_populate_sysroot \
33 ${PN}:do_image_${@d.getVar('LIVE_ROOTFS_TYPE').replace('-', '_')} \
34 "
35
36
37LABELS_LIVE ?= "boot install"
38ROOT_LIVE ?= "root=/dev/ram0"
39INITRD_IMAGE_LIVE ?= "${MLPREFIX}core-image-minimal-initramfs"
40INITRD_LIVE ?= "${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE_LIVE}-${MACHINE}.${INITRAMFS_FSTYPES}"
41
42LIVE_ROOTFS_TYPE ?= "ext4"
43ROOTFS ?= "${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.${LIVE_ROOTFS_TYPE}"
44
45IMAGE_TYPEDEP_live = "${LIVE_ROOTFS_TYPE}"
46IMAGE_TYPEDEP_iso = "${LIVE_ROOTFS_TYPE}"
47IMAGE_TYPEDEP_hddimg = "${LIVE_ROOTFS_TYPE}"
48IMAGE_TYPES_MASKED += "live hddimg iso"
49
50python() {
51 image_b = d.getVar('IMAGE_BASENAME')
52 initrd_i = d.getVar('INITRD_IMAGE_LIVE')
53 if image_b == initrd_i:
54 bb.error('INITRD_IMAGE_LIVE %s cannot use image live, hddimg or iso.' % initrd_i)
55 bb.fatal('Check IMAGE_FSTYPES and INITRAMFS_FSTYPES settings.')
56 elif initrd_i:
57 d.appendVarFlag('do_bootimg', 'depends', ' %s:do_image_complete' % initrd_i)
58}
59
60HDDDIR = "${S}/hddimg"
61ISODIR = "${S}/iso"
62EFIIMGDIR = "${S}/efi_img"
63COMPACT_ISODIR = "${S}/iso.z"
64
65ISOLINUXDIR ?= "/isolinux"
66ISO_BOOTIMG = "isolinux/isolinux.bin"
67ISO_BOOTCAT = "isolinux/boot.cat"
68MKISOFS_OPTIONS = "-no-emul-boot -boot-load-size 4 -boot-info-table"
69
70BOOTIMG_VOLUME_ID ?= "boot"
71BOOTIMG_EXTRA_SPACE ?= "512"
72
73populate_live() {
74 populate_kernel $1
75 if [ -s "${ROOTFS}" ]; then
76 install -m 0644 ${ROOTFS} $1/rootfs.img
77 fi
78}
79
80build_iso() {
81 # Only create an ISO if we have an INITRD and the live or iso image type was selected
82 if [ -z "${INITRD}" ] || [ "${@bb.utils.contains_any('IMAGE_FSTYPES', 'live iso', '1', '0', d)}" != "1" ]; then
83 bbnote "ISO image will not be created."
84 return
85 fi
86 # ${INITRD} is a list of multiple filesystem images
87 for fs in ${INITRD}
88 do
89 if [ ! -s "$fs" ]; then
90 bbwarn "ISO image will not be created. $fs is invalid."
91 return
92 fi
93 done
94
95 populate_live ${ISODIR}
96
97 if [ "${PCBIOS}" = "1" ]; then
98 syslinux_iso_populate ${ISODIR}
99 fi
100 if [ "${EFI}" = "1" ]; then
101 efi_iso_populate ${ISODIR}
102 build_fat_img ${EFIIMGDIR} ${ISODIR}/efi.img
103 fi
104
105 # EFI only
106 if [ "${PCBIOS}" != "1" ] && [ "${EFI}" = "1" ] ; then
107 # Work around bug in isohybrid where it requires isolinux.bin
108 # In the boot catalog, even though it is not used
109 mkdir -p ${ISODIR}/${ISOLINUXDIR}
110 install -m 0644 ${STAGING_DATADIR}/syslinux/isolinux.bin ${ISODIR}${ISOLINUXDIR}
111 fi
112
113 # We used to have support for zisofs; this is a relic of that
114 mkisofs_compress_opts="-r"
115
116 # Check the size of ${ISODIR}/rootfs.img, use mkisofs -iso-level 3
117 # when it exceeds 3.8GB, the specification is 4G - 1 bytes, we need
118 # leave a few space for other files.
119 mkisofs_iso_level=""
120
121 if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
122 rootfs_img_size=`stat -c '%s' ${ISODIR}/rootfs.img`
123 # 4080218931 = 3.8 * 1024 * 1024 * 1024
124 if [ $rootfs_img_size -gt 4080218931 ]; then
125 bbnote "${ISODIR}/rootfs.img execeeds 3.8GB, using '-iso-level 3' for mkisofs"
126 mkisofs_iso_level="-iso-level 3"
127 fi
128 fi
129
130 if [ "${PCBIOS}" = "1" ] && [ "${EFI}" != "1" ] ; then
131 # PCBIOS only media
132 mkisofs -V ${BOOTIMG_VOLUME_ID} \
133 -o ${IMGDEPLOYDIR}/${IMAGE_NAME}.iso \
134 -b ${ISO_BOOTIMG} -c ${ISO_BOOTCAT} \
135 $mkisofs_compress_opts \
136 ${MKISOFS_OPTIONS} $mkisofs_iso_level ${ISODIR}
137 else
138 # EFI only OR EFI+PCBIOS
139 mkisofs -A ${BOOTIMG_VOLUME_ID} -V ${BOOTIMG_VOLUME_ID} \
140 -o ${IMGDEPLOYDIR}/${IMAGE_NAME}.iso \
141 -b ${ISO_BOOTIMG} -c ${ISO_BOOTCAT} \
142 $mkisofs_compress_opts ${MKISOFS_OPTIONS} $mkisofs_iso_level \
143 -eltorito-alt-boot -eltorito-platform efi \
144 -b efi.img -no-emul-boot \
145 ${ISODIR}
146 isohybrid_args="-u"
147 fi
148
149 isohybrid $isohybrid_args ${IMGDEPLOYDIR}/${IMAGE_NAME}.iso
150}
151
152build_fat_img() {
153 FATSOURCEDIR=$1
154 FATIMG=$2
155
156 # Calculate the size required for the final image including the
157 # data and filesystem overhead.
158 # Sectors: 512 bytes
159 # Blocks: 1024 bytes
160
161 # Determine the sector count just for the data
162 SECTORS=$(expr $(du --apparent-size -ks ${FATSOURCEDIR} | cut -f 1) \* 2)
163
164 # Account for the filesystem overhead. This includes directory
165 # entries in the clusters as well as the FAT itself.
166 # Assumptions:
167 # FAT32 (12 or 16 may be selected by mkdosfs, but the extra
168 # padding will be minimal on those smaller images and not
169 # worth the logic here to caclulate the smaller FAT sizes)
170 # < 16 entries per directory
171 # 8.3 filenames only
172
173 # 32 bytes per dir entry
174 DIR_BYTES=$(expr $(find ${FATSOURCEDIR} | tail -n +2 | wc -l) \* 32)
175 # 32 bytes for every end-of-directory dir entry
176 DIR_BYTES=$(expr $DIR_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 32))
177 # 4 bytes per FAT entry per sector of data
178 FAT_BYTES=$(expr $SECTORS \* 4)
179 # 4 bytes per FAT entry per end-of-cluster list
180 FAT_BYTES=$(expr $FAT_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 4))
181
182 # Use a ceiling function to determine FS overhead in sectors
183 DIR_SECTORS=$(expr $(expr $DIR_BYTES + 511) / 512)
184 # There are two FATs on the image
185 FAT_SECTORS=$(expr $(expr $(expr $FAT_BYTES + 511) / 512) \* 2)
186 SECTORS=$(expr $SECTORS + $(expr $DIR_SECTORS + $FAT_SECTORS))
187
188 # Determine the final size in blocks accounting for some padding
189 BLOCKS=$(expr $(expr $SECTORS / 2) + ${BOOTIMG_EXTRA_SPACE})
190
191 # mkdosfs will sometimes use FAT16 when it is not appropriate,
192 # resulting in a boot failure from SYSLINUX. Use FAT32 for
193 # images larger than 512MB, otherwise let mkdosfs decide.
194 if [ $(expr $BLOCKS / 1024) -gt 512 ]; then
195 FATSIZE="-F 32"
196 fi
197
198 # mkdosfs will fail if ${FATIMG} exists. Since we are creating an
199 # new image, it is safe to delete any previous image.
200 if [ -e ${FATIMG} ]; then
201 rm ${FATIMG}
202 fi
203
204 if [ -z "${HDDIMG_ID}" ]; then
205 mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} ${MKDOSFS_EXTRAOPTS} -C ${FATIMG} \
206 ${BLOCKS}
207 else
208 mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} ${MKDOSFS_EXTRAOPTS} -C ${FATIMG} \
209 ${BLOCKS} -i ${HDDIMG_ID}
210 fi
211
212 # Copy FATSOURCEDIR recursively into the image file directly
213 mcopy -i ${FATIMG} -s ${FATSOURCEDIR}/* ::/
214}
215
216build_hddimg() {
217 # Create an HDD image
218 if [ "${@bb.utils.contains_any('IMAGE_FSTYPES', 'live hddimg', '1', '0', d)}" = "1" ] ; then
219 populate_live ${HDDDIR}
220
221 if [ "${PCBIOS}" = "1" ]; then
222 syslinux_hddimg_populate ${HDDDIR}
223 fi
224 if [ "${EFI}" = "1" ]; then
225 efi_hddimg_populate ${HDDDIR}
226 fi
227
228 # Check the size of ${HDDDIR}/rootfs.img, error out if it
229 # exceeds 4GB, it is the single file's max size of FAT fs.
230 if [ -f ${HDDDIR}/rootfs.img ]; then
231 rootfs_img_size=`stat -c '%s' ${HDDDIR}/rootfs.img`
232 max_size=`expr 4 \* 1024 \* 1024 \* 1024`
233 if [ $rootfs_img_size -ge $max_size ]; then
234 bberror "${HDDDIR}/rootfs.img rootfs size is greather than or equal to 4GB,"
235 bberror "and this doesn't work on a FAT filesystem. You can either:"
236 bberror "1) Reduce the size of rootfs.img, or,"
237 bbfatal "2) Use wic, vmdk,vhd, vhdx or vdi instead of hddimg\n"
238 fi
239 fi
240
241 build_fat_img ${HDDDIR} ${IMGDEPLOYDIR}/${IMAGE_NAME}.hddimg
242
243 if [ "${PCBIOS}" = "1" ]; then
244 syslinux_hddimg_install
245 fi
246
247 chmod 644 ${IMGDEPLOYDIR}/${IMAGE_NAME}.hddimg
248 fi
249}
250
251python do_bootimg() {
252 set_live_vm_vars(d, 'LIVE')
253 if d.getVar("PCBIOS") == "1":
254 bb.build.exec_func('build_syslinux_cfg', d)
255 if d.getVar("EFI") == "1":
256 bb.build.exec_func('build_efi_cfg', d)
257 bb.build.exec_func('build_hddimg', d)
258 bb.build.exec_func('build_iso', d)
259 bb.build.exec_func('create_symlinks', d)
260}
261do_bootimg[subimages] = "hddimg iso"
262do_bootimg[imgsuffix] = "."
263
264addtask bootimg before do_image_complete