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Meta: Allow overriding the default calculated _disk_image size

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By providing SERENITY_DISK_SIZE_BYTES as an environment variable, the
calculation of default value considered suitable for the size of files
and number of inodes that will be included can be sidestepped.
This commit is contained in:
Linus Groh 2022-05-07 17:56:11 +02:00
parent 360e149c5c
commit 3d5645f07d
1 changed files with 15 additions and 8 deletions
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23
Meta/build-image-qemu.sh
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@ -73,14 +73,21 @@ INODE_SIZE=128
INODE_COUNT=$(($(inode_usage "$SERENITY_SOURCE_DIR/Base") + $(inode_usage Root)))
DISK_SIZE_BYTES=$((($(disk_usage "$SERENITY_SOURCE_DIR/Base") + $(disk_usage Root) + INODE_COUNT) * 1024))
# Try to use heuristics to guess a good disk size and inode count.
# The disk must notably fit:
# * Data blocks (for both files and directories),
# * Indirect/doubly indirect/triply indirect blocks,
# * Inodes and block bitmaps for each block group,
# * Plenty of extra free space and free inodes.
DISK_SIZE_BYTES=$(((DISK_SIZE_BYTES + (INODE_COUNT * INODE_SIZE * 2)) * 3))
INODE_COUNT=$((INODE_COUNT * 7))
if [ -z "$SERENITY_DISK_SIZE_BYTES" ]; then
# Try to use heuristics to guess a good disk size and inode count.
# The disk must notably fit:
# * Data blocks (for both files and directories),
# * Indirect/doubly indirect/triply indirect blocks,
# * Inodes and block bitmaps for each block group,
# * Plenty of extra free space and free inodes.
DISK_SIZE_BYTES=$(((DISK_SIZE_BYTES + (INODE_COUNT * INODE_SIZE * 2)) * 3))
INODE_COUNT=$((INODE_COUNT * 7))
else
if [ "$DISK_SIZE_BYTES" -gt "$SERENITY_DISK_SIZE_BYTES" ]; then
die "SERENITY_DISK_SIZE_BYTES is set to $SERENITY_DISK_SIZE_BYTES but required disk size is $DISK_SIZE_BYTES bytes"
fi
DISK_SIZE_BYTES="$SERENITY_DISK_SIZE_BYTES"
fi
USE_EXISTING=0