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zfs_fs: Fix errors when not changing mountpoint

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Running `zfs set mountpoint=/mnt/my-ds tank/my-ds`, ZFS may try to
unmount the dataset even if the mountpoint didn't change.
To avoid the confusing error message, this command is now only run when
the mountpoint actually changes.
This commit is contained in:
Felix Uhl 2024-08-22 17:51:15 +02:00 committed by mergify[bot]
parent 4b866c9942
commit f6b2e0052d
1 changed files with 10 additions and 7 deletions
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17
lib/types/zfs_fs.nix
View file

@ -73,7 +73,7 @@
"pbkdf2salt"
"keyformat"
];
updateOptions = builtins.removeAttrs config.options onetimeProperties;
updateOptions = builtins.removeAttrs config.options (onetimeProperties ++ [ "mountpoint" ]);
mountpoint = config.options.mountpoint or config.mountpoint;
in
''
@ -84,12 +84,15 @@
else
zfs set ${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "${n}=${v}") updateOptions)} ${config._name}
${lib.optionalString (mountpoint != null) ''
# zfs will try unmount the dataset to change the mountpoint
# but this might fail if the dataset is in use
if ! zfs set mountpoint=${mountpoint} ${config._name}; then
echo "Failed to set mountpoint to '${mountpoint}' for ${config._name}." >&2
echo "You may need to run when the pool is not mounted i.e. in a recovery system:" >&2
echo " zfs set mountpoint=${mountpoint} ${config._name}" >&2
if [[ "$(zfs get -H -o value mountpoint ${config._name})" != "${mountpoint}" ]]; then
echo "Changing mountpoint to '${mountpoint}' for ${config._name}..."
# zfs will try unmount the dataset to change the mountpoint
# but this might fail if the dataset is in use
if ! zfs set mountpoint=${mountpoint} ${config._name}; then
echo "Failed to set mountpoint to '${mountpoint}' for ${config._name}." >&2
echo "You may need to run when the pool is not mounted i.e. in a recovery system:" >&2
echo " zfs set mountpoint=${mountpoint} ${config._name}" >&2
fi
fi
''}
''}