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authorJason Wessel <jason.wessel@windriver.com>2013-09-14 00:08:57 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2013-09-17 14:26:21 +0100
commit6d5181dc68766f42416a41f4988e8400d37fd7fa (patch)
treeedad4d7cdbc713e2cbb7c7a514170822444513d0 /meta/classes
parent22ac874512c2c1213aae8e1644bd59050b37a63c (diff)
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bootimage.bbclass: Move fat image creation into a function
In order to call the fat image creation multiple times it needs to be in its own function. A future commit will make use of the new function to additionally create EFI image files for use with an ISO. [YOCTO #4100] [YOCTO #1913] Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/classes')
-rw-r--r--meta/classes/bootimg.bbclass110
1 files changed, 58 insertions, 52 deletions
diff --git a/meta/classes/bootimg.bbclass b/meta/classes/bootimg.bbclass
index 90a241d9b3..bd211fbdc3 100644
--- a/meta/classes/bootimg.bbclass
+++ b/meta/classes/bootimg.bbclass
@@ -111,6 +111,63 @@ build_iso() {
ln -s ${IMAGE_NAME}.iso ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.iso
}
+build_fat_img() {
+ FATSOURCEDIR=$1
+ FATIMG=$2
+
+ # Calculate the size required for the final image including the
+ # data and filesystem overhead.
+ # Sectors: 512 bytes
+ # Blocks: 1024 bytes
+
+ # Determine the sector count just for the data
+ SECTORS=$(expr $(du --apparent-size -ks ${FATSOURCEDIR} | cut -f 1) \* 2)
+
+ # Account for the filesystem overhead. This includes directory
+ # entries in the clusters as well as the FAT itself.
+ # Assumptions:
+ # FAT32 (12 or 16 may be selected by mkdosfs, but the extra
+ # padding will be minimal on those smaller images and not
+ # worth the logic here to caclulate the smaller FAT sizes)
+ # < 16 entries per directory
+ # 8.3 filenames only
+
+ # 32 bytes per dir entry
+ DIR_BYTES=$(expr $(find ${FATSOURCEDIR} | tail -n +2 | wc -l) \* 32)
+ # 32 bytes for every end-of-directory dir entry
+ DIR_BYTES=$(expr $DIR_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 32))
+ # 4 bytes per FAT entry per sector of data
+ FAT_BYTES=$(expr $SECTORS \* 4)
+ # 4 bytes per FAT entry per end-of-cluster list
+ FAT_BYTES=$(expr $FAT_BYTES + $(expr $(find ${FATSOURCEDIR} -type d | tail -n +2 | wc -l) \* 4))
+
+ # Use a ceiling function to determine FS overhead in sectors
+ DIR_SECTORS=$(expr $(expr $DIR_BYTES + 511) / 512)
+ # There are two FATs on the image
+ FAT_SECTORS=$(expr $(expr $(expr $FAT_BYTES + 511) / 512) \* 2)
+ SECTORS=$(expr $SECTORS + $(expr $DIR_SECTORS + $FAT_SECTORS))
+
+ # Determine the final size in blocks accounting for some padding
+ BLOCKS=$(expr $(expr $SECTORS / 2) + ${BOOTIMG_EXTRA_SPACE})
+
+ # Ensure total sectors is an integral number of sectors per
+ # track or mcopy will complain. Sectors are 512 bytes, and we
+ # generate images with 32 sectors per track. This calculation is
+ # done in blocks, thus the mod by 16 instead of 32.
+ BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16)))
+
+ # mkdosfs will sometimes use FAT16 when it is not appropriate,
+ # resulting in a boot failure from SYSLINUX. Use FAT32 for
+ # images larger than 512MB, otherwise let mkdosfs decide.
+ if [ $(expr $BLOCKS / 1024) -gt 512 ]; then
+ FATSIZE="-F 32"
+ fi
+
+ mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${FATIMG} ${BLOCKS}
+ # Copy FATSOURCEDIR recursively into the image file directly
+ mcopy -i ${FATIMG} -s ${FATSOURCEDIR}/* ::/
+}
+
build_hddimg() {
# Create an HDD image
if [ "${NOHDD}" != "1" ] ; then
@@ -123,58 +180,7 @@ build_hddimg() {
grubefi_hddimg_populate
fi
- # Calculate the size required for the final image including the
- # data and filesystem overhead.
- # Sectors: 512 bytes
- # Blocks: 1024 bytes
-
- # Determine the sector count just for the data
- SECTORS=$(expr $(du --apparent-size -ks ${HDDDIR} | cut -f 1) \* 2)
-
- # Account for the filesystem overhead. This includes directory
- # entries in the clusters as well as the FAT itself.
- # Assumptions:
- # FAT32 (12 or 16 may be selected by mkdosfs, but the extra
- # padding will be minimal on those smaller images and not
- # worth the logic here to caclulate the smaller FAT sizes)
- # < 16 entries per directory
- # 8.3 filenames only
-
- # 32 bytes per dir entry
- DIR_BYTES=$(expr $(find ${HDDDIR} | tail -n +2 | wc -l) \* 32)
- # 32 bytes for every end-of-directory dir entry
- DIR_BYTES=$(expr $DIR_BYTES + $(expr $(find ${HDDDIR} -type d | tail -n +2 | wc -l) \* 32))
- # 4 bytes per FAT entry per sector of data
- FAT_BYTES=$(expr $SECTORS \* 4)
- # 4 bytes per FAT entry per end-of-cluster list
- FAT_BYTES=$(expr $FAT_BYTES + $(expr $(find ${HDDDIR} -type d | tail -n +2 | wc -l) \* 4))
-
- # Use a ceiling function to determine FS overhead in sectors
- DIR_SECTORS=$(expr $(expr $DIR_BYTES + 511) / 512)
- # There are two FATs on the image
- FAT_SECTORS=$(expr $(expr $(expr $FAT_BYTES + 511) / 512) \* 2)
- SECTORS=$(expr $SECTORS + $(expr $DIR_SECTORS + $FAT_SECTORS))
-
- # Determine the final size in blocks accounting for some padding
- BLOCKS=$(expr $(expr $SECTORS / 2) + ${BOOTIMG_EXTRA_SPACE})
-
- # Ensure total sectors is an integral number of sectors per
- # track or mcopy will complain. Sectors are 512 bytes, and we
- # generate images with 32 sectors per track. This calculation is
- # done in blocks, thus the mod by 16 instead of 32.
- BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16)))
-
- # mkdosfs will sometimes use FAT16 when it is not appropriate,
- # resulting in a boot failure from SYSLINUX. Use FAT32 for
- # images larger than 512MB, otherwise let mkdosfs decide.
- if [ $(expr $BLOCKS / 1024) -gt 512 ]; then
- FATSIZE="-F 32"
- fi
-
- IMG=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
- mkdosfs ${FATSIZE} -n ${BOOTIMG_VOLUME_ID} -S 512 -C ${IMG} ${BLOCKS}
- # Copy HDDDIR recursively into the image file directly
- mcopy -i ${IMG} -s ${HDDDIR}/* ::/
+ build_fat_img ${HDDDIR} ${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hddimg
if [ "${PCBIOS}" = "1" ]; then
syslinux_hddimg_install