From: "Michael Niederle" <mniederle@gmx.at>
To: linux-btrfs@vger.kernel.org
Subject: btrfs subvol find-new
Date: Fri, 26 Mar 2010 11:18:07 +0100 [thread overview]
Message-ID: <20100326111807.24dcc2f0@simplux> (raw)
I want to write a differential backup tool for btrfs snapshots.
The new "btrfs subvol find-new"-command sounds great on first encounter, but I'm
missing informations about updated directories. I would need a list of updated
directories to scan for deleted files.
I had a look at find_updated_files() in btrfs-list.c. To me it seems as if
the ioctl would only return the extents of regular files.
The function find_root_gen() in btrfs-list.c seems to return the newest
generation in a given snapshot. It would be nice to have this exported as a
user command (e.g. "btrfs subvol newest-gen") then one could use the output of
btrfs subvol newest-gen <old snapshot>
(plus 1) as the input generation number to
btrfs subvol find-new <new snapshot> <gen+1>
(I'm using kernel 2.6.32.10 with the most current btrfs-kernel modules and
userland tools as of last Saturday.)
Greetings, Michael
next reply other threads:[~2010-03-26 10:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-26 10:18 Michael Niederle [this message]
2010-03-26 13:22 ` btrfs subvol find-new Chris Mason
2010-03-26 18:51 ` btrfs subvol find-modified Dipl.-Ing. Michael Niederle
2010-03-26 19:36 ` Chris Mason
2010-03-26 20:22 ` Dipl.-Ing. Michael Niederle
2010-03-26 20:26 ` Chris Mason
2010-03-26 20:36 ` Goffredo Baroncelli
2010-03-26 21:11 ` Chris Mason
2010-03-26 22:23 ` Goffredo Baroncelli
2010-03-27 9:52 ` directory order in btrfs Dipl.-Ing. Michael Niederle
2010-03-26 21:38 ` btrfs subvol diff Dipl.-Ing. Michael Niederle
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