Pawel Jakub Dawidek 497b7ef946 Allow to rename file systems without remounting if it is possible. ... It is possible for file systems with 'mountpoint' preperty set to 'legacy' or 'none' - we don't have to change mount directory for them. Currently such file systems are unmounted on rename and not even mounted back. This introduces layering violation, as we need to update 'f_mntfromname' field in statfs structure related to mountpoint (for the dataset we are renaming and all its children). In my opinion it is worth it, as it allow to update FreeBSD in even cleaner way - in ZFS-only configuration root file system is ZFS file system with 'mountpoint' property set to 'legacy'. If root dataset is named system/rootfs, we can snapshot it (system/rootfs@upgrade), clone it (system/oldrootfs), update FreeBSD and if it doesn't boot we can boot back from system/oldrootfs and rename it back to system/rootfs while it is mounted as /. Before it was not possible, because unmounting / was not possible. MFC after: 2 weeks		2011-10-24 00:38:09 +00:00
..
cmd	zdb: access dp_free_bpobj only if pool version is >= SPA_VERSION_DEADLISTS	2011-10-21 13:56:17 +00:00
common	MFV OpenSolaris DTrace userland bits.	2010-08-02 13:40:53 +00:00
head	thr_create: new_thread_ID may be NULL	2011-10-21 13:54:58 +00:00
lib	Allow to rename file systems without remounting if it is possible.	2011-10-24 00:38:09 +00:00
tools/ctf	MFV OpenSolaris DTrace userland bits.	2010-08-02 13:40:53 +00:00
OPENSOLARIS.LICENSE	Now that we have CDDLed code in the tree, add CDDL license.	2007-09-23 07:04:50 +00:00