similar to: Cross-subvolume reflink copy (BTRFS_IOC_CLONE over subvolume boundaries)

Hello, This is the second attempt to bring in cross subvolume reflinks into btrfs. The first attempt was NAKed due to missing vfs mount checks and a clear description of what btrfs subvolumes are and probably also why cross subvolume reflinks are ok in the case of btrfs. This version of the patch comes from David and is in SUSE kernels since a long time, so it is tested and working. The patch

Hi all, Just a quick question but can''t find an obvious answer. Can I create/convert a existing (btrfs) directory into a subvolume? It would be very helpful when transferring ''partitions'' into btrfs. I found a similar question way back in google, but that site is down now generally. Thanks in advance. -- To unsubscribe from this list: send the line

It''s safe and easy to do so, provided the ranges don''t overlap. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> --- fs/btrfs/ioctl.c | 23 ++++++++++++++++------- 1 files changed, 16 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 0b06a5c..8fcd671 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2223,8 +2223,6 @@ static

Hi, The following series of patches implements in btrfs an ioctl to do out-of-band deduplication of file extents. To be clear, this means that the file system is mounted and running, but the dedupe is not done during file writes, but after the fact when some userspace software initiates a dedupe. The primary patch is loosely based off of one sent by Josef Bacik back in January, 2011.

I am testing a Btrfs root file system with Debian (kernel 2.6.32) under KVM. jason@vrtl:~$ touch testfile jason@vrtl:~$ cp --reflink testfile /tmp cp: failed to clone `/tmp/testfile'': Invalid argument This is with GNU Coreutils 8.0 taken from debian Sid. Is this a Coreutils issue, a Btrfs problem or something in my local configuration? All the other issues that I have encountered so

* Sage Weil (sage@newdream.net) [091216 17:55]: > On Wed, 16 Dec 2009, Li Dongyang wrote: > > > Have a look at line 998, ioctl.c, inside btrfs_ioctl_clone(), > > the src->i_size(the size of the testfile created by touch) is just 0, and this > > will cause btrfs_ioctl_clone just return -EINVAL. > > I''m not sure if it makes sense to clone a file which

It seems that the BTRFS_IOC_CLONE ioctl fails when trying to do a cross-subvolume clone of a file. Chris Mason suggested in the past ([1]) that this should be possible. Am I missing something? [1] http://kerneltrap.org/mailarchive/linux-btrfs/2010/6/10/6884911 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to

We need to truncate page cache pages for the clone ioctl target range or else we''ll confuse ourselves to no end. If the old data was cached, we''ll still see it (until remount). If it was dirty we''ll get a mix of old and new data if the page(s) are partially updated. Signed-off-by: Sage Weil <sage@newdream.net> --- fs/btrfs/ioctl.c | 4 ++++ 1 files changed,

Glück Auf! I know its been discussed more then ones, but as a user I really would like to see the patch for allowing this in the kernel. Some users tested this patch successfully for weeks or months in 2 or 3 kernel versions since then, true? I''d say by creating a snapshot, it''s nothing else in the end. More then one file or tree sharing the same data on disc, or am I wrong?

https://bugzilla.samba.org/show_bug.cgi?id=10170 Summary: rsync should support reflink similar to cp --reflink Product: rsync Version: 3.1.0 Platform: All OS/Version: All Status: NEW Severity: normal Priority: P5 Component: core AssignedTo: wayned at samba.org ReportedBy: samba at shubin.ca

I want to make you aware of a possible bug in the reflink handling of btrfs: When I reflink a file larger 2GB (on the same subvol), the reflinking fails. But it works fine for files smaller 2GB in size. I was able to track this down to btrfs with great support of Martin Raiber who created a small demo code: Source: https://urbackup.atlassian.net/secure/attachment/10201/reflink.cpp Compile: g++

This testscript creates reflinks to files on different subvolumes, overwrites the original files and reflinks, and moves reflinked files between subvolumes. Originally submitted as testcase 302, changes are made based on comments from Eric: http://oss.sgi.com/archives/xfs/2013-03/msg00231.html Two new common/rc functions used in this script (_require_cp_reflink and _verify_reflink) have been

When btrfs_start_transaction() fails, we should call btrfs_std_error() properly for filesystem to readonly. (in this patch, forced readonly framework is used) Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com> --- fs/btrfs/file.c | 1 + fs/btrfs/inode.c | 34 +++++++++++++++++++++++++++------- fs/btrfs/ioctl.c | 11 ++++++++++- fs/btrfs/relocation.c | 4 +++-

This patch allows klibc to build on parisc64 platforms. $ diff -u MCONFIG.old MCONFIG --- MCONFIG.old 2005-06-18 01:16:12.000000000 +0000 +++ MCONFIG 2005-06-18 01:18:51.000000000 +0000 @@ -33,7 +33,7 @@ KLIBCVER = -D__KLIBC__=$(shell cut -d. -f1 < $(SRCROOT)/version) \ -D__KLIBC_MINOR__=$(shell cut -d. -f2 < $(SRCROOT)/version) -ARCH = $(shell uname -m | sed -e

If You want to compile vorbis libraries under win32 environment you can experience some problems: 1) If you unzip vorbis libraries, you will have 3 directories: "libogg-1.0", "libvorbis-1.0" and "vorbis-tools-1.0". You need to rename them to "ogg", "vorbis", "vorbis-tools". Otherwise batch files or even dsp project files, won't work.

This testscript creates reflinks to files on different subvolumes, overwrites the original files and reflinks, and moves reflinked files between subvolumes. Originally submitted as testcase 302, changes are made based on comments from Eric: http://oss.sgi.com/archives/xfs/2013-03/msg00231.html Two new common/rc functions used in this script (_require_cp_reflink and _verify_reflink) have been

Hi, how can I do the following in a shell script: - check whether my file system supports cp --reflink? - check whether two files share the same data on disk, i.e. one has been created by cp --reflink of the other? Thank you! Thomas Koch -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info

Hellow, everyone I'm from HuaWei, China. We are looking for the candidate of virtualization platform among several vendors. Learned from Oracle people, the latest version of ocfs2 has integrated reflink feature which was commited to the the linux 2.6.32 kernel. But as we know, the sles11 integrated the linux 2.6.27 kernle, so the relink feature is not avaiable on the sles11 platform. We

In reflink we update the id info in the disk but forget to update the corresponding information in the VFS inode. So update them accordingly in case we want to preserve the attributes. Reported-by: Jeff Liu <jeff.liu at oracle.com> Signed-off-by: Tao Ma <tao.ma at oracle.com> --- fs/ocfs2/refcounttree.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git

It would still be downloading the whole file only to write out a new one. Rsync writes out a whole new file because it assumes it is doing so locally. The source of that new file can be a combination of parts of the existing file and parts of the remote file but it still writes the whole thing. --inplace helps with that somewhat but you will probably still write all of the file after the first