[syncoid] Feature request - separate argument for ZFS properties

[Peter2121]

I have a problem when I try to send a dataset with many children to a backup host.

To avoid mounting the datasets received on a backup host, I need to set ZFS property canmount to noauto (using -u does not help as the dataset will be mounted on reboot). So, I use syncoid with argument --recvoptions='-u -o canmount=noauto'. The problem is that some datasets must be synced with their properties (for example, to avoid loosing the information about mountpoints), so --preserve-properties argument must be used as well. Unfortunately, some datasets have ZFS property canmount set to something. For example, in FreeBSD the dataset /usr has canmount set to off. zfs receive command failed in such case: property 'canmount' specified multiple times.

I think that syncoid needs a separate argument to manage zfs properties to set by zfs receive. For example, something like --recvprop='canmount:noauto' (with a possibility to be specified multiple times). The properties set at this manner should override the properties got from the source dataset (for example, in case of /usr, the destination dataset will have canmount=noauto).

I would be happy to help with this, but I'm zero in Perl :(

...But I'm ready to help with testing/debugging ;)

[Peter2121]

...And there is the same problem on restore - at the same time I need to use --preserve-properties (for example, to restore the mountpoint) and I need to pass --recvoptions='-o canmount=on' to mount the dataset immediately or on reboot.