I'm trying to make this snapshots/subvolumes listing feature,
I wonder how the interface should be.
I tried to make this feature using ioctl interface, but I don't
know how to notify all subvolume informations because number
of subvolumes are not known before search.
(It may work, that we call number-notify ioctl before subvol-
listing ioctl itself, or we call subvol-listing ioctl repeatedly
to last subvolume. But both seem to be not good to me.)
Is there any other idea?
Chris Mason wrote:
On Sat, Oct 17, 2009 at 01:20:28PM -0400, John Dong wrote:
Suppose I want to do test something insane (like a massive OS
update) to my system, and create a snapshot before doing so.
Afterwards, if I decide my system is hosed and I'd like to revert
back to the snapshot and forget any of this actually happened,
what's the quickest way of doing it. It seems like by btrfs's design
there should be a way to just set the head of the filesystem back
to the snapshot, like git-reset, right?
This is near the top of the list of features I want to add for 2.6.33.
Basically all we need is a way to swap the default subvolume (which is
just a directory entry) pointer with another subvolume.
We also want a way to find an snapshot all the subvolumes and snapshots
underneath a given root. That way the user won't have to do it
manually (snapshotting isn't recursive by default).
If anyone is interested in a coding project, both are fairly easy, just
let me know.
-chris
--
To unsubscribe from this list: send the line unsubscribe linux-btrfs in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
--
taruisi
--
To unsubscribe from this list: send the line unsubscribe linux-btrfs in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
