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authorRichard Yao <[email protected]>2013-05-28 20:08:15 -0400
committerBrian Behlendorf <[email protected]>2013-06-18 17:03:25 -0700
commit9eaf0832ad945fb8584c39fb9aeb5e8578912aeb (patch)
treeed9b2b289616359d16b957c7a9c554221b5d7276 /module/zfs/zio.c
parentfb02fabf9b8045d6a1ddedf3f79171f69633162d (diff)
Improve OpenRC init script
The current zfs OpenRC script's dependencies cause OpenRC to attempt to unmount ZFS filesystems at shutdown while things were still using them, which would fail. This is a cosmetic issue, but it should still be addressed. It probably does not affect systems where the rootfs is a legacy filesystem, but any system with the rootfs on ZFS needs to run the ZFS init script after the system is ready to shutdown filesystems. OpenRC's shutdown process occurs in the reverse order of the startup process. Therefore running the ZFS shutdown procedure after filesystems are ready to be unmounted requires running the startup procedure before fstab. This patch changes the dependencies of the script to expliclty run before fstab at boot when the rootfs is ZFS and to run after fstab at boot whenever the rootfs is not ZFS. This should cover most use cases. The only cases not covered well by this are systems with legacy root filesystems where people want to configure fstab to mount a non-ZFS filesystem off a zvol and possibly also systems whose pools are stored on network block devices. The former requires that the ZFS script run before fstab, which could cause ZFS datasets to mount too early and appear under the fstab mount points. The latter requires that the ZFS script run after networking starts, which precludes the ability to store any system information on ZFS. An additional OpenRC script could be written to handle non-root pools on network block devices, but that will depend on user demand and developer time. Signed-off-by: Richard Yao <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #1479
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