[Bug 274263] Access to zfs snapshots within a jail return EPERM after a while of operation
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Date: Thu, 19 Sep 2024 17:52:51 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=274263 Jamie Gritton <jamie@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|Closed |In Progress Resolution|FIXED |--- Assignee|jail@FreeBSD.org |jamie@FreeBSD.org --- Comment #15 from Jamie Gritton <jamie@FreeBSD.org> --- Created attachment 253669 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=253669&action=edit Hack to set the zfs.mount_snapshot parameter It looks like I implemented half a solution, which was worse than no solution at all. I change the description of the parameter to boolean, without realizing that continuing to expect an integer made the kernel reject jail(8)'s attempts to set it. I must have tested my fix on a mismatched kernel and userspace, or something. All is not lost, as there's a hack available to work around this. jail_set(2) can still send an integer, even though jail(8) and libjail(3) will try not to. I've attached a small hack program than can do the job. You'll need to run it after the jail is created, e.g. with the following in jail.conf: exec.created += "/path/to/setzfsmount $name"; Unfortunately, this workaround will remain necessary until the kernel is fixed, probably on the next release. -- You are receiving this mail because: You are the assignee for the bug.