116ba4b180
moving to initramfs unifies disk allocate on different platforms. use fallocate instead of dd to speed up the disk allocation. By default, mkfs.ext4 has -E discard option which discards the blocks at the mkfs time, also speed up the initialization time.
37 lines
860 B
Bash
37 lines
860 B
Bash
#!/bin/sh -e
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PREREQS=""
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prereqs() { echo "$PREREQS"; }
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case $1 in
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prereqs)
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prereqs
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exit 0
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;;
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esac
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# Extract kernel parameters
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set -- $(cat /proc/cmdline)
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for x in "$@"; do
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case "$x" in
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varlog_size=*)
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varlog_size="${x#varlog_size=}"
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esac
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done
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[ -z "$varlog_size" ] && exit 0
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# exit when the var_log.ext4 exists and the size matches
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if [ -e "${rootmnt}/host/disk-img/var-log.ext4" ]; then
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cur_varlog_size=$(ls -l ${rootmnt}/host/disk-img/var-log.ext4 | awk '{print $5}')
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if [ $cur_varlog_size == $((1024*1024*$varlog_size)) ]; then
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exit 0
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else
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rm -rf ${rootmnt}/host/disk-img
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fi
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fi
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# create varlog disk
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mkdir -p ${rootmnt}/host/disk-img && ${rootmnt}/usr/bin/fallocate -l "$varlog_size"M ${rootmnt}/host/disk-img/var-log.ext4 && mkfs.ext4 -q -F ${rootmnt}/host/disk-img/var-log.ext4
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