mirror of
https://github.com/Start9Labs/start-os.git
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98 lines
2.3 KiB
Bash
Executable File
98 lines
2.3 KiB
Bash
Executable File
# Local filesystem mounting -*- shell-script -*-
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#
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# This script overrides local_mount_root() in /scripts/local
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# and mounts root as a read-only filesystem with a temporary (rw)
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# overlay filesystem.
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#
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. /scripts/local
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local_mount_root()
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{
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echo 'using embassy initramfs module'
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local_top
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local_device_setup "${ROOT}" "root file system"
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ROOT="${DEV}"
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# Get the root filesystem type if not set
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if [ -z "${ROOTFSTYPE}" ]; then
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FSTYPE=$(get_fstype "${ROOT}")
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else
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FSTYPE=${ROOTFSTYPE}
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fi
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local_premount
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# CHANGES TO THE ORIGINAL FUNCTION BEGIN HERE
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# N.B. this code still lacks error checking
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modprobe ${FSTYPE}
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checkfs ${ROOT} root "${FSTYPE}"
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ROOTFLAGS="$(echo "${ROOTFLAGS}" | sed 's/subvol=\(next\|current\)//')"
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if [ "${FSTYPE}" != "unknown" ]; then
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mount -t ${FSTYPE} ${ROOTFLAGS} ${ROOT} ${rootmnt}
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else
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mount ${ROOTFLAGS} ${ROOT} ${rootmnt}
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fi
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echo 'mounting embassyfs'
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mkdir /embassyfs
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mount --move ${rootmnt} /embassyfs
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if ! [ -d /embassyfs/current ] && [ -d /embassyfs/prev ]; then
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mv /embassyfs/prev /embassyfs/current
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fi
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if ! [ -d /embassyfs/current ]; then
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mkdir /embassyfs/current
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for FILE in $(ls /embassyfs); do
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if [ "$FILE" != current ]; then
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mv /embassyfs/$FILE /embassyfs/current/
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fi
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done
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fi
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mkdir -p /embassyfs/config
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if [ -f /embassyfs/config/upgrade ] && [ -d /embassyfs/next ]; then
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mv /embassyfs/current /embassyfs/prev
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mv /embassyfs/next /embassyfs/current
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rm /embassyfs/config/upgrade
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fi
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if ! [ -d /embassyfs/next ]; then
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if [ -d /embassyfs/prev ]; then
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mv /embassyfs/prev /embassyfs/next
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else
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mkdir /embassyfs/next
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fi
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fi
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mkdir /lower /upper
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mount -r --bind /embassyfs/current /lower
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modprobe overlay || insmod "/lower/lib/modules/$(uname -r)/kernel/fs/overlayfs/overlay.ko"
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# Mount a tmpfs for the overlay in /upper
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mount -t tmpfs tmpfs /upper
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mkdir /upper/data /upper/work
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# Mount the final overlay-root in $rootmnt
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mount -t overlay \
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-olowerdir=/lower,upperdir=/upper/data,workdir=/upper/work \
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overlay ${rootmnt}
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mkdir -p ${rootmnt}/media/embassy/config
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mount --bind /embassyfs/config ${rootmnt}/media/embassy/config
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mkdir -p ${rootmnt}/media/embassy/next
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mount --bind /embassyfs/next ${rootmnt}/media/embassy/next
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mkdir -p ${rootmnt}/media/embassy/embassyfs
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mount -r --bind /embassyfs ${rootmnt}/media/embassy/embassyfs
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} |