zfs-import-{cache,scan}: change condition to FileNotEmpty

When all pools are exported ZFS will generate an empty cache file. This will cause the import service to fail, which is sub-optimal, since this means that dracut fails, and it necessary to run `zpool import -a` to boot, delete the file, and regenerate+reinstall the initrd. This resolves the issue by treating an zero-length cache files the same as a missing cache file. This aligns the behavior with that of the `zpool` command itself. Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Richard Laager <[email protected]> Signed-off-by: Ahelenia Ziemiańska <[email protected]> Closes #11568
openzfs · Feb 5, 2021 · 7c64ee9 · 7c64ee9
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commit 7c64ee9
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diff --git a/etc/systemd/system/zfs-import-cache.service.in b/etc/systemd/system/zfs-import-cache.service.in
@@ -8,7 +8,7 @@ After=cryptsetup.target
 After=multipathd.target
 After=systemd-remount-fs.service
 Before=zfs-import.target
-ConditionPathExists=@sysconfdir@/zfs/zpool.cache
+ConditionFileNotEmpty=@sysconfdir@/zfs/zpool.cache
 ConditionPathIsDirectory=/sys/module/zfs
 
 [Service]

diff --git a/etc/systemd/system/zfs-import-scan.service.in b/etc/systemd/system/zfs-import-scan.service.in
@@ -7,7 +7,7 @@ After=systemd-udev-settle.service
 After=cryptsetup.target
 After=multipathd.target
 Before=zfs-import.target
-ConditionPathExists=!@sysconfdir@/zfs/zpool.cache
+ConditionFileNotEmpty=!@sysconfdir@/zfs/zpool.cache
 ConditionPathIsDirectory=/sys/module/zfs
 
 [Service]