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Timothy C. Quinn
Asked: 2020-12-13 15:28:22 +0800 CST

ZFS Diff - diff delegated permission is needed

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When running zfs diff today as non-root, I got an error:

Unable to obtain diffs: 
   The sys_mount privilege or diff delegated permission is needed
   to execute the diff ioctl

Searching diff delegated permission in google did not give any results.

What is diff delegated permission and how do you get around this block to allow non-root users to run zfs diff.

permissions diff zfs

1 Answers

  1. This issue is resolved by granting diff permission in ZFS to the user in question by issuing the following command:

    sudo zfs allow <user> diff <zpool>/<dataset>

    eg: To grant diff permission to jblogs on dataset rpool/USERDATA:

    sudo zfs allow jblogs diff rpool/USERDATA
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