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9052e3d70b
Unlike other filesystems, snapshots and rollbacks of bootfs need to be done from a rescue environment. This patch makes it possible to snap- shot or rollback the bootfs simply by specifying bootfs.snapshot or bootfs.rollback on the kernel command line. The operation will be performed by dracut just before bootfs is mounted. Reviewed-by: Antonio Russo <antonio.e.russo@gmail.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Gregory Bartholomew <gregory.lee.bartholomew@gmail.com> Closes #10198
15 lines
487 B
SYSTEMD
15 lines
487 B
SYSTEMD
[Unit]
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Description=Snapshot bootfs just before it is mounted
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Requisite=zfs-import.target
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After=zfs-import.target
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Before=dracut-mount.service
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DefaultDependencies=no
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ConditionKernelCommandLine=bootfs.snapshot
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[Service]
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# ${BOOTFS} should have been set by zfs-env-bootfs.service
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Type=oneshot
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ExecStartPre=/bin/sh -c 'test -n "${BOOTFS}"'
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ExecStart=-/bin/sh -c '. /lib/dracut-lib.sh; SNAPNAME="$(getarg bootfs.snapshot)"; /sbin/zfs snapshot "${BOOTFS}@${SNAPNAME:-%v}"'
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RemainAfterExit=yes
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