Re: kern/57467: zfs cannot umount snapshots once access it via /usr/.zfs/shapshots/ ....

[Sergio de Almeida Lenzi <nervoso%k1.com.br@localhost>]

Em ter, 2023-06-13 às 06:10 +0000, Michael van Elst escreveu:

The following reply was made to PR kern/57467; it has been noted by GNATS.

From: 

mlelstv%serpens.de@localhost

 (Michael van Elst)

To: 

gnats-bugs%netbsd.org@localhost

Cc: 

Subject: Re: kern/57467: zfs cannot umount snapshots once access it via /usr/.zfs/shapshots/ ....

Date: Tue, 13 Jun 2023 06:07:51 -0000 (UTC)

nervoso%k1.com.br@localhost

 writes:

 >but once I leave the directory, the mountpoint remains, and

 >there is NO WAY to umount it... umount /usr/.zfs/.... => operation not permitted even on root

 The zfs tool doesn't umount because a snapshot is of the wrong type. This might still be true for ZFS-on-Linux.

is there a patch for this issue??? on FreeBSD it works ok .

 The regular umount (which works on Linux) fails with "Invalid argument"

 because the snapshot is mounted with a vnode that isn't marked as VV_ROOT.

 I'm not sure if that flag could easily be set for it.

If I patch zfsmount to set the VV_ROOT will it work?

are there working on zfs to resolve these issues???

Ty