From: "Matwey V. Kornilov" <matwey.kornilov@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: btrfs: obtain block checksums from user space
Date: Thu, 24 Sep 2015 21:06:32 +0300 [thread overview]
Message-ID: <mu1e38$io1$1@ger.gmane.org> (raw)
Hello,
I would like to read the list of the checksums for the specific file
stored onto btrfs filesystem. I think I could use the checksums in the
manner like rsync does, but safe both CPU (because csums are already
calculated for the file) and I/O (because I don't need to reread all the
file from the hard drive).
I've looked through linux kernel sources and not found appropriate ioctl
to do this. Frankly speaking, I've not found good documentations for all
available btrfs ioctls.
next reply other threads:[~2015-09-24 18:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-24 18:06 Matwey V. Kornilov [this message]
2015-09-24 18:35 ` btrfs: obtain block checksums from user space Austin S Hemmelgarn
2015-09-24 18:48 ` Matwey V. Kornilov
2015-09-24 19:47 ` Austin S Hemmelgarn
2015-09-28 23:11 ` Calvin Walton
2015-09-28 23:16 ` Hugo Mills
2015-09-28 23:25 ` Calvin Walton
2015-10-01 16:59 ` David Sterba
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