All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-ext4@vger.kernel.org
Subject: [RFC PATCH v6 0/8] vfs/xfs/ext4: GETFSMAP support
Date: Fri, 17 Feb 2017 17:17:18 -0800	[thread overview]
Message-ID: <148738063792.29384.10681837280402457846.stgit@birch.djwong.org> (raw)

Hi all,

This is an RFC patchset implementing the GETFSMAP ioctl that we
discussed at LSFMM 2016[1].  GETFSMAP takes two search keys, which are
defined as a tuple of (device, physical block, owner, file offset), and
returns all known space mapping information for the given filesystem.

The XFS implementation is fully complete for filesystems having the new
reverse-mapping feature introduced in 4.8.  For legacy XFS filesystems
and ext4, there is no reverse-mapping data and the returned extent
information is restricted to listing "free", "unknown", or "metadata"
owners.

Space mapping information can be dumped via the xfs_io 'fsmap' command,
and the upcoming xfs_spaceman utility analyzes the free extent data to
produce free space fragmentations reports.  Further in the future, the
xfs_scrub utility will use GETFSMAP to assist in data block read
verification.

Kernel source can be found in the git repo [2] and userspace utilities
in the git repo[3].  The XFS patches have been hanging around in my
repos for months accumulating fixes; the ext4 patches are newish.

Note: This patchset is headed for 4.12 at the earliest.

Questions?  Comments?

--D

[1] https://lwn.net/Articles/685978/
[2] https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=djwong-devel
[3] https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=djwong-devel

             reply	other threads:[~2017-02-18  1:17 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-18  1:17 Darrick J. Wong [this message]
2017-02-18  1:17 ` [PATCH 1/8] vfs: add common GETFSMAP ioctl definitions Darrick J. Wong
2017-02-18  1:17 ` [PATCH 2/8] xfs: plumb in needed functions for range querying of the freespace btrees Darrick J. Wong
2017-02-21 14:35   ` Brian Foster
2017-02-21 17:22     ` Darrick J. Wong
2017-02-21 17:34   ` [PATCH v2 " Darrick J. Wong
2017-02-22 15:02     ` Brian Foster
2017-02-18  1:17 ` [PATCH 3/8] xfs: provide a query_range function for " Darrick J. Wong
2017-02-21 14:35   ` Brian Foster
2017-02-18  1:17 ` [PATCH 4/8] xfs: create a function to query all records in a btree Darrick J. Wong
2017-02-21 14:35   ` Brian Foster
2017-02-18  1:17 ` [PATCH 5/8] xfs: introduce the XFS_IOC_GETFSMAP ioctl Darrick J. Wong
2017-02-22 15:02   ` Brian Foster
2017-02-22 21:17     ` Darrick J. Wong
2017-02-23 14:45       ` Brian Foster
2017-02-23 20:44         ` Darrick J. Wong
2017-02-23 23:43           ` Brian Foster
2017-02-24  0:54             ` Darrick J. Wong
2017-02-18  1:17 ` [PATCH 6/8] xfs: have getfsmap fall back to the freesp btrees when rmap is not present Darrick J. Wong
2017-02-24 13:04   ` Brian Foster
2017-02-24 17:48     ` Darrick J. Wong
2017-02-24 22:33       ` Darrick J. Wong
2017-02-18  1:18 ` [PATCH 7/8] xfs: getfsmap should fall back to rtbitmap when rtrmapbt " Darrick J. Wong
2017-02-18  1:18 ` [PATCH 8/8] ext4: support GETFSMAP ioctls Darrick J. Wong
2017-02-21 22:14 ` [PATCH] ioctl_getfsmap.2: document the GETFSMAP ioctl Darrick J. Wong

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=148738063792.29384.10681837280402457846.stgit@birch.djwong.org \
    --to=darrick.wong@oracle.com \
    --cc=linux-ext4@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    --cc=linux-xfs@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.