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From: Trent Nelson <trent@snakebite.org>
To: "fs@freebsd.org" <fs@freebsd.org>
Date: Sun, 28 Aug 2011 00:26:26 -0700
Thread-Topic: How do you zfs rename a dataset that has children?
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Subject: How do you zfs rename a dataset that has children?
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This has me scratching my head:

[root@usbkey/ttypts/0(~)#] zfs create tank/host/foo
[root@usbkey/ttypts/0(~)#] zfs create tank/host/foo/bar            =20
[root@usbkey/ttypts/0(~)#] zfs rename tank/host/foo tank/host/test
Assertion failed: (!clp->cl_alldependents), file /usr/src/cddl/lib/libzfs/.=
./../../cddl/contrib/opensolaris/lib/libzfs/common/libzfs_changelist.c, lin=
e 470.
zsh: abort (core dumped)  zfs rename tank/host/foo tank/host/test

Say wha'?

Renaming the child dataset first works, but it's not what I want, obviously=
:

[root@usbkey/ttypts/0(~)#] zfs rename tank/host/foo/bar tank/host/test/bar
cannot create 'tank/host/test/bar': parent does not exist
[root@usbkey/ttypts/0(~)#] zfs rename -p tank/host/foo/bar tank/host/test/b=
ar
[root@usbkey/ttypts/0(~)#] zfs rename tank/host/foo tank/host/test/bar   =20
cannot rename 'tank/host/foo': dataset already exists

[root@usbkey/ttypts/0(~)#] uname -a
FreeBSD usbkey.home.trent.me 8.2-STABLE FreeBSD 8.2-STABLE #2 r224667M: Sat=
 Aug  6 04:11:46 EDT 2011     root@home.trent.me:/usr/obj/usr/src/sys/GENER=
IC  amd64

(The 'M' in r224667M is due to a device ID I changed in e1000.h; unrelated =
to this issue.)

What am I doing wrong?

(My actual use case is more complicated than the test case above; I built a=
 new system, named 'fulcrum', from an existing build, named 'flanker'. I wa=
nt to rename tank/host/flanker -> tank/host/fulcrum (hence booting from the=
 usbkey).)


Regards,

	Trent.