Public bug reported:

[Impact]
 * People having personal layout, like a persistent dedicated dataset under 
/boot like /boot/grub will get it unmouted after a state revert.
 * Side effects:
  - those datasets are never marked as being part of the current machine, or 
any state.
  - bpool and bpool/BOOT are not listed in the unmanaged dataset list.

[Test Case]
 * Install ZFS manually with a persistent bpool/bpool/grub dataset
 * Take a snapshot
 * Revert to this snapshot when rebooting
 * Check that the persistent grub dataset is still mounted
 * You can check as well with zsysctl show --full that you have this persistent 
dataset attached to the machine.

[Regression Potential]
 * New datasets under /boot could appear to be attached by the machine (even if 
unlikely due to the huge testsuite which has been updated and checked)

** Affects: zsys (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: zsys (Ubuntu Bionic)
     Importance: Undecided
         Status: New

** Also affects: zsys (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Description changed:

  [Impact]
- 
-  * People having personal layout, like a persistent dedicated dataset under 
/boot like /boot/grub will get it unmouted after a state revert.
-  * Side effects:
-   - those datasets are never marked as being part of the current machine, or 
any state.
-   - bpool and bpool/BOOT are not listed in the unmanaged dataset list.
+  * People having personal layout, like a persistent dedicated dataset under 
/boot like /boot/grub will get it unmouted after a state revert.
+  * Side effects:
+   - those datasets are never marked as being part of the current machine, or 
any state.
+   - bpool and bpool/BOOT are not listed in the unmanaged dataset list.
  
  [Test Case]
+  * Install ZFS manually with a persistent bpool/bpool/grub dataset
+  * Take a snapshot
+  * Revert to this snapshot when rebooting
+  * Check that the persistent grub dataset is still mounted
+  * You can check as well with zsysctl show --full that you have this 
persistent dataset attached to the machine.
  
-  * Install ZFS manually with a persistent bpool/bpool/grub dataset
-  * Take a snapshot
-  * Revert to this snapshot when rebooting
-  * Check that the persistent grub dataset is still mounted
-  * You can check as well with zsysctl show that you have this persistent 
dataset attached to the machine.
- 
- [Regression Potential] 
-  * New datasets under /boot could appear to be attached by the machine (even 
if unlikely due to the huge testsuite which has been updated and checked)
+ [Regression Potential]
+  * New datasets under /boot could appear to be attached by the machine (even 
if unlikely due to the huge testsuite which has been updated and checked)

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https://bugs.launchpad.net/bugs/1897563

Title:
  Zsys changes the canmount property of persistent bpool/grub dataset

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