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Patrick Williamsd8c66bc2016-06-20 12:57:21 -05001# Copyright (C) 2004, Advanced Micro Devices, Inc. All Rights Reserved
2# Released under the MIT license (see packages/COPYING)
Patrick Williamsc124f4f2015-09-15 14:41:29 -05003
Patrick Williamsd8c66bc2016-06-20 12:57:21 -05004# Creates a bootable image using syslinux, your kernel and an optional
5# initrd
Patrick Williamsc124f4f2015-09-15 14:41:29 -05006
Patrick Williamsd8c66bc2016-06-20 12:57:21 -05007#
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
Patrick Williamsc124f4f2015-09-15 14:41:29 -050015
Patrick Williamsd8c66bc2016-06-20 12:57:21 -050016# 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)
Patrick Williamsc124f4f2015-09-15 14:41:29 -050019
Patrick Williamsd8c66bc2016-06-20 12:57:21 -050020# External variables (also used by syslinux.bbclass)
21# ${INITRD} - indicates a list of filesystem images to concatenate and use as an initrd (optional)
22# ${COMPRESSISO} - Transparent compress ISO, reduce size ~40% if set to 1
23# ${NOISO} - skip building the ISO image if set to 1
24# ${NOHDD} - skip building the HDD image if set to 1
25# ${HDDIMG_ID} - FAT image volume-id
26# ${ROOTFS} - indicates a filesystem image to include as the root filesystem (optional)
27
28inherit live-vm-common
29
30do_bootimg[depends] += "dosfstools-native:do_populate_sysroot \
31 mtools-native:do_populate_sysroot \
32 cdrtools-native:do_populate_sysroot \
33 virtual/kernel:do_deploy \
34 ${MLPREFIX}syslinux:do_populate_sysroot \
35 syslinux-native:do_populate_sysroot \
36 ${@oe.utils.ifelse(d.getVar('COMPRESSISO', False),'zisofs-tools-native:do_populate_sysroot','')} \
37 ${PN}:do_image_ext4 \
38 "
39
40
41LABELS_LIVE ?= "boot install"
42ROOT_LIVE ?= "root=/dev/ram0"
43INITRD_IMAGE_LIVE ?= "core-image-minimal-initramfs"
44INITRD_LIVE ?= "${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE_LIVE}-${MACHINE}.cpio.gz"
45
46ROOTFS ?= "${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.ext4"
Patrick Williamsc124f4f2015-09-15 14:41:29 -050047
48IMAGE_TYPEDEP_live = "ext4"
Patrick Williamsd8c66bc2016-06-20 12:57:21 -050049IMAGE_TYPEDEP_iso = "ext4"
50IMAGE_TYPEDEP_hddimg = "ext4"
51IMAGE_TYPES_MASKED += "live hddimg iso"
52
53python() {
54 image_b = d.getVar('IMAGE_BASENAME', True)
55 initrd_i = d.getVar('INITRD_IMAGE_LIVE', True)
56 if image_b == initrd_i:
57 bb.error('INITRD_IMAGE_LIVE %s cannot use image live, hddimg or iso.' % initrd_i)
58 bb.fatal('Check IMAGE_FSTYPES and INITRAMFS_FSTYPES settings.')
59 else:
60 d.appendVarFlag('do_bootimg', 'depends', ' %s:do_image_complete' % initrd_i)
61}
62
63HDDDIR = "${S}/hddimg"
64ISODIR = "${S}/iso"
65EFIIMGDIR = "${S}/efi_img"
66COMPACT_ISODIR = "${S}/iso.z"
67COMPRESSISO ?= "0"
68
69ISOLINUXDIR ?= "/isolinux"
70ISO_BOOTIMG = "isolinux/isolinux.bin"
71ISO_BOOTCAT = "isolinux/boot.cat"
72MKISOFS_OPTIONS = "-no-emul-boot -boot-load-size 4 -boot-info-table"
73
74BOOTIMG_VOLUME_ID ?= "boot"
75BOOTIMG_EXTRA_SPACE ?= "512"
76
77populate_live() {
78 populate_kernel $1
79 if [ -s "${ROOTFS}" ]; then
80 install -m 0644 ${ROOTFS} $1/rootfs.img
81 fi
82}
83
84build_iso() {
85 # Only create an ISO if we have an INITRD and NOISO was not set
86 if [ -z "${INITRD}" ] || [ "${NOISO}" = "1" ]; then
87 bbnote "ISO image will not be created."
88 return
89 fi
90 # ${INITRD} is a list of multiple filesystem images
91 for fs in ${INITRD}
92 do
93 if [ ! -s "$fs" ]; then
94 bbnote "ISO image will not be created. $fs is invalid."
95 return
96 fi
97 done
98
99 populate_live ${ISODIR}
100
101 if [ "${PCBIOS}" = "1" ]; then
102 syslinux_iso_populate ${ISODIR}
103 fi
104 if [ "${EFI}" = "1" ]; then
105 efi_iso_populate ${ISODIR}
106 build_fat_img ${EFIIMGDIR} ${ISODIR}/efi.img
107 fi
108
109 # EFI only
110 if [ "${PCBIOS}" != "1" ] && [ "${EFI}" = "1" ] ; then
111 # Work around bug in isohybrid where it requires isolinux.bin
112 # In the boot catalog, even though it is not used
113 mkdir -p ${ISODIR}/${ISOLINUXDIR}
114 install -m 0644 ${STAGING_DATADIR}/syslinux/isolinux.bin ${ISODIR}${ISOLINUXDIR}
115 fi
116
117 if [ "${COMPRESSISO}" = "1" ] ; then
118 # create compact directory, compress iso
119 mkdir -p ${COMPACT_ISODIR}
120 mkzftree -z 9 -p 4 -F ${ISODIR}/rootfs.img ${COMPACT_ISODIR}/rootfs.img
121
122 # move compact iso to iso, then remove compact directory
123 mv ${COMPACT_ISODIR}/rootfs.img ${ISODIR}/rootfs.img
124 rm -Rf ${COMPACT_ISODIR}
125 mkisofs_compress_opts="-R -z -D -l"
126 else
127 mkisofs_compress_opts="-r"
128 fi
129
130 # Check the size of ${ISODIR}/rootfs.img, use mkisofs -iso-level 3
131 # when it exceeds 3.8GB, the specification is 4G - 1 bytes, we need
132 # leave a few space for other files.
133 mkisofs_iso_level=""
134
135 if [ -n "${ROOTFS}" ] && [ -s "${ROOTFS}" ]; then
136 rootfs_img_size=`stat -c '%s' ${ISODIR}/rootfs.img`
137 # 4080218931 = 3.8 * 1024 * 1024 * 1024
138 if [ $rootfs_img_size -gt 4080218931 ]; then
139 bbnote "${ISODIR}/rootfs.img execeeds 3.8GB, using '-iso-level 3' for mkisofs"
140 mkisofs_iso_level="-iso-level 3"
141 fi
142 fi
143
144 if [ "${PCBIOS}" = "1" ] && [ "${EFI}" != "1" ] ; then
145 # PCBIOS only media
146 mkisofs -V ${BOOTIMG_VOLUME_ID} \
147 -o ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.iso \
148 -b ${ISO_BOOTIMG} -c ${ISO_BOOTCAT} \
149 $mkisofs_compress_opts \
150 ${MKISOFS_OPTIONS} $mkisofs_iso_level ${ISODIR}
151 else
152 # EFI only OR EFI+PCBIOS
153 mkisofs -A ${BOOTIMG_VOLUME_ID} -V ${BOOTIMG_VOLUME_ID} \
154 -o ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.iso \
155 -b ${ISO_BOOTIMG} -c ${ISO_BOOTCAT} \
156 $mkisofs_compress_opts ${MKISOFS_OPTIONS} $mkisofs_iso_level \
157 -eltorito-alt-boot -eltorito-platform efi \
158 -b efi.img -no-emul-boot \
159 ${ISODIR}
160 isohybrid_args="-u"
161 fi
162
163 isohybrid $isohybrid_args ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.iso
164}
165
166build_fat_img() {
167 FATSOURCEDIR=$1
168 FATIMG=$2
169
170 # Calculate the size required for the final image including the
171 # data and filesystem overhead.
172 # Sectors: 512 bytes
173 # Blocks: 1024 bytes
174
175 # Determine the sector count just for the data
176 SECTORS=$(expr $(du --apparent-size -ks ${FATSOURCEDIR} | cut -f 1) \* 2)
177
178 # Account for the filesystem overhead. This includes directory
179 # entries in the clusters as well as the FAT itself.
180 # Assumptions:
181 # FAT32 (12 or 16 may be selected by mkdosfs, but the extra
182 # padding will be minimal on those smaller images and not
183 # worth the logic here to caclulate the smaller FAT sizes)
184 # < 16 entries per directory
185 # 8.3 filenames only
186
187 # 32 bytes per dir entry
188 DIR_BYTES=$(expr $(find ${FATSOURCEDIR} | tail -n +2 | wc -l) \* 32)
189 # 32 bytes for every end-of-directory dir entry
190 DIR_BYTES=$(expr $DIR_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 32))
191 # 4 bytes per FAT entry per sector of data
192 FAT_BYTES=$(expr $SECTORS \* 4)
193 # 4 bytes per FAT entry per end-of-cluster list
194 FAT_BYTES=$(expr $FAT_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 4))
195
196 # Use a ceiling function to determine FS overhead in sectors
197 DIR_SECTORS=$(expr $(expr $DIR_BYTES + 511) / 512)
198 # There are two FATs on the image
199 FAT_SECTORS=$(expr $(expr $(expr $FAT_BYTES + 511) / 512) \* 2)
200 SECTORS=$(expr $SECTORS + $(expr $DIR_SECTORS + $FAT_SECTORS))
201
202 # Determine the final size in blocks accounting for some padding
203 BLOCKS=$(expr $(expr $SECTORS / 2) + ${BOOTIMG_EXTRA_SPACE})
204
205 # Ensure total sectors is an integral number of sectors per
206 # track or mcopy will complain. Sectors are 512 bytes, and we
207 # generate images with 32 sectors per track. This calculation is
208 # done in blocks, thus the mod by 16 instead of 32.
209 BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16)))
210
211 # mkdosfs will sometimes use FAT16 when it is not appropriate,
212 # resulting in a boot failure from SYSLINUX. Use FAT32 for
213 # images larger than 512MB, otherwise let mkdosfs decide.
214 if [ $(expr $BLOCKS / 1024) -gt 512 ]; then
215 FATSIZE="-F 32"
216 fi
217
218 # mkdosfs will fail if ${FATIMG} exists. Since we are creating an
219 # new image, it is safe to delete any previous image.
220 if [ -e ${FATIMG} ]; then
221 rm ${FATIMG}
222 fi
223
224 if [ -z "${HDDIMG_ID}" ]; then
225 mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${FATIMG} \
226 ${BLOCKS}
227 else
228 mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${FATIMG} \
229 ${BLOCKS} -i ${HDDIMG_ID}
230 fi
231
232 # Copy FATSOURCEDIR recursively into the image file directly
233 mcopy -i ${FATIMG} -s ${FATSOURCEDIR}/* ::/
234}
235
236build_hddimg() {
237 # Create an HDD image
238 if [ "${NOHDD}" != "1" ] ; then
239 populate_live ${HDDDIR}
240
241 if [ "${PCBIOS}" = "1" ]; then
242 syslinux_hddimg_populate ${HDDDIR}
243 fi
244 if [ "${EFI}" = "1" ]; then
245 efi_hddimg_populate ${HDDDIR}
246 fi
247
248 # Check the size of ${HDDDIR}/rootfs.img, error out if it
249 # exceeds 4GB, it is the single file's max size of FAT fs.
250 if [ -f ${HDDDIR}/rootfs.img ]; then
251 rootfs_img_size=`stat -c '%s' ${HDDDIR}/rootfs.img`
252 max_size=`expr 4 \* 1024 \* 1024 \* 1024`
253 if [ $rootfs_img_size -gt $max_size ]; then
254 bberror "${HDDDIR}/rootfs.img execeeds 4GB,"
255 bberror "this doesn't work on FAT filesystem, you can try either of:"
256 bberror "1) Reduce the size of rootfs.img"
257 bbfatal "2) Use iso, vmdk or vdi to instead of hddimg\n"
258 fi
259 fi
260
261 build_fat_img ${HDDDIR} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
262
263 if [ "${PCBIOS}" = "1" ]; then
264 syslinux_hddimg_install
265 fi
266
267 chmod 644 ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
268 fi
269}
270
271python do_bootimg() {
272 set_live_vm_vars(d, 'LIVE')
273 if d.getVar("PCBIOS", True) == "1":
274 bb.build.exec_func('build_syslinux_cfg', d)
275 if d.getVar("EFI", True) == "1":
276 bb.build.exec_func('build_efi_cfg', d)
277 bb.build.exec_func('build_hddimg', d)
278 bb.build.exec_func('build_iso', d)
279 bb.build.exec_func('create_symlinks', d)
280}
281do_bootimg[subimages] = "hddimg iso"
282do_bootimg[imgsuffix] = "."
283
284addtask bootimg before do_image_complete