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45 lines
1.3 KiB
45 lines
1.3 KiB
#!/bin/sh
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overlay_enabled() {
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return 0
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}
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overlay_run() {
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info "Mounting slot..."
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mkdir /slot
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if [ -z "$bootparam_root" ]; then
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fatal "ERROR: No root device was provided."
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fi
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if [ -n "$bootparam_rootfstype" ]; then
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mount_arg="-t $bootparam_rootfstype"
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fi
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mount $mount_arg -o ro $bootparam_root /slot || fatal "Failed!"
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info "Mounting squashfs..."
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mkdir /ro-root
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mount -t squashfs -o loop=/dev/loop0,ro /slot/rootfs.squashfs /ro-root || fatal "Failed!"
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info "Mounting tmpfs..."
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mkdir /rw-root
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mount -t tmpfs -o size=25%,mode=1777,uid=0,gid=0,rw tmpfs /rw-root || fatal "Failed!"
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if grep -q aufs /proc/filesystems; then
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info "Mounting aufs..."
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mount -t aufs -o br=/rw-root:/ro-root aufs /rootfs || fatal "Failed!"
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else
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info "Mounting overlayfs..."
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mkdir /rw-root/root
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mkdir /rw-root/work
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mount -t overlayfs -o lowerdir=/ro-root,upperdir=/rw-root/root,workdir=/rw-root/work overlayfs /rootfs || fatal "Failed!"
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fi
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if [ -e /slot/overlay.tar.bz2 ]; then
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info "Extracting overlay..."
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tar xf /slot/overlay.tar.bz2 -C /rootfs || fatal "Failed!"
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fi
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info "Moving overlay components..."
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mkdir /rootfs/slot
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mkdir /rootfs/ro-root
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mkdir /rootfs/rw-root
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mount --move /slot /rootfs/slot
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mount --move /ro-root /rootfs/ro-root
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mount --move /rw-root /rootfs/rw-root
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# rootfs is already handled
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bootparam_root=
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}
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