Re: Atomic file data replace API

On 6 January 2011 20:01, Olaf van der Spek olafvds...@gmail.com wrote: Hi, Does btrfs support atomic file data replaces? Hi Olaf, Yes btrfs does support atomic replace, since kernel 2.6.30 circa June 2009. [1] Special handling was added to ext3, ext4, btrfs (and probably other Linux FSs) for

Re: cannot remove files: No space left on device

On 12 June 2011 00:32, Tomasz Chmielewski man...@wpkg.org wrote: I'm trying to remove some files on a btrfs filesystem which has 26 GB free: /dev/sdb4             336G  310G   26G  93% /mnt/btrfs Unfortunately, removing some of the files fails, due to No space left on device:

Re: [PATCH 2/4] btrfs-progs: fix segment fault when exec btrfs-debug-tree as non-root

On 20 February 2014 02:49, Gui Hecheng guihc.f...@cn.fujitsu.com wrote: When exec btrfs-debug-tree as non-root user, we get a segment fault. Because the btrfs_scan_block_devices return a success 0 when we fail to open a device. Now we just return the errno if this case happens. Signed-off-by:

How to identify if a partition containing a btrfs volume is mounted and where

Hi, I am trying to enhance GParted (http://www.gparted.org/) to better support btrfs, specifically multi-device ones. GParted displays the busy status (mounted or not) and the mount point of each partition. For a single device file system this is easy. Entry in /proc/mounts for the partition

Re: How to identify if a partition containing a btrfs volume is mounted and where

On 25 February 2014 03:01, Anand Jain anand.j...@oracle.com wrote: # mkfs.btrfs /dev/sdb2 /dev/sdb3 /dev/sdb4 # mount /dev/sdb2 /mnt/1 # btrfs device delete /dev/sdb2 /mnt/1 So /dev/sdb2 is no longer part of the file system, but it's still mounted using it. # grep btrfs /proc/mounts

Re: How to identify if a partition containing a btrfs volume is mounted and where

On 25 February 2014 10:28, Mike Fleetwood mike.fleetw...@googlemail.com wrote: On 25 February 2014 03:01, Anand Jain anand.j...@oracle.com wrote: # mkfs.btrfs /dev/sdb2 /dev/sdb3 /dev/sdb4 # mount /dev/sdb2 /mnt/1 # btrfs device delete /dev/sdb2 /mnt/1 So /dev/sdb2 is no longer part

Re: [PATCH 00/14] Enhanced df - followup

On 29 April 2014 16:56, David Sterba dste...@suse.cz wrote: Changes: * btrfs filesystem disk_usage - renamed to usage * added a section of overall filesystem usage, that used to be in the 'fi df' output * btrfs device disk_usage - renamed to usage * the device size prints both

Re: [PATCH 07/14] btrfs-progs: Print more info about device sizes

On 29 April 2014 17:02, David Sterba dste...@suse.cz wrote: The entire device size may not be available to the filesystem, eg. if it's modified via resize. Print this information if it can be obtained from the DEV_INFO ioctl. Print the device ID on the same line as the device name and move

Re: [PATCH] btrfs-progs: Improve the parse_size() error message.

On 20 May 2014 08:51, Qu Wenruo quwen...@cn.fujitsu.com wrote: When using parse_size(), even non-numeric value is passed, it will only give error message ERROR: size value is empty, which is quite confusing for end users. This patch will introduce more meaningful error message for the

Re: Partition tables / Output of parted

On 4 June 2014 14:30, Russell Coker russ...@coker.com.au wrote: On Wed, 4 Jun 2014 13:19:16 Stefan Malte Schumacher wrote: I have created multiple filesystems with btrfs, in all cases directly on the devices themself without creating partitions beforehand. I do that sometimes, it works well.

Re: BTRFS and power loss ~= corruption?

On 26 August 2011 07:37, Arne Jansen sensi...@gmx.net wrote: On 26.08.2011 01:01, Gregory Maxwell wrote: On Wed, Aug 24, 2011 at 9:11 AM, Berend Dekens bt...@cyberwizzard.nl wrote: It seems to me that if someone created a block device which recorded all write operations a rather excellent

[PATCH] Btrfs: Don't error on resizing FS to same size

It seems overly harsh to fail a resize of a btrfs file system to the same size when a shrink or grow would succeed. User app GParted trips over this error. Allow it by bypassing the shrink or grow operation. Signed-off-by: Mike Fleetwood mike.fleetw...@googlemail.com --- Example failed resize

Re: [PATCH] Btrfs: Don't error on resizing FS to same size

On Fri, Nov 18, 2011 at 03:52:00PM +1100, Chris Samuel wrote: On 18/11/11 08:04, Mike Fleetwood wrote: It seems overly harsh to fail a resize of a btrfs file system to the same size when a shrink or grow would succeed. User app GParted trips over this error. Allow it by bypassing

[PATCH v2] Btrfs: Don't error on resizing FS to same size

It seems overly harsh to fail a resize of a btrfs file system to the same size when a shrink or grow would succeed. User app GParted trips over this error. Allow it by bypassing the shrink or grow operation. Signed-off-by: Mike Fleetwood mike.fleetw...@googlemail.com --- v2: Fix FS shrink

Re: Disk space accounting and subvolume delete

On 12 May 2010 06:02, Yan, Zheng yanzh...@21cn.com wrote: On Tue, May 11, 2010 at 11:45 PM, Bruce Guenter br...@untroubled.org wrote: On Tue, May 11, 2010 at 08:10:38AM +0800, Yan, Zheng  wrote: This is because the snapshot deleting ioctl only removes the a link. Right, I understand that.  

Re: How to remove btrfs information

On 17 November 2012 16:04, Goffredo Baroncelli kreij...@gmail.com wrote: On 11/17/2012 03:52 AM, Yangtse Su wrote: I have an btrfs part on /dev/sda5,Then I install windows8 with the windows8 installer.I remove this btrfs part and install windows8 on it.Now in my Linux,'btfrs filesystem show'

Re: Interpreting Output of btrfs fi show

On 30 April 2012 18:10, Hubert Kario h...@qbs.com.pl wrote: On Sunday 29 of April 2012 08:13:48 Martin Steigerwald wrote: Am Donnerstag, 26. April 2012 schrieb Bart Noordervliet: On Thu, Apr 26, 2012 at 11:06, Thomas Rohwer troh...@ennit.de wrote: As for the two filesystems shown in btrfs

Re: btrfs_print_tree?

On 1 July 2012 05:53, Zhi Yong Wu zwu.ker...@gmail.com wrote: HI, Do anyone know where btrfs_print_tree is invoked? thanks. -- Regards, Zhi Yong Wu Is this the answer you are after? $ grep -r btrfs_print_tree fs/btrfs/ fs/btrfs/print-tree.c:void btrfs_print_tree(struct btrfs_root *root,

Re: [PATCH v2] btrfs-progs: introduce test_issubvolname() for simplicity

On 30 July 2014 04:25, Satoru Takeuchi takeuchi_sat...@jp.fujitsu.com wrote: From: Satoru Takeuchi takeuchi_sat...@jp.fujitsu.com There are many duplicated codes to check if the given string is correct subvolume name. Introduce test_issubvolname() for this purpose for simplicity.

Re: [PATCH 2/2] btrfs-progs: fix wrong num_devices for btrfs fi show with seed devices

On 7 November 2014 18:16, David Sterba dste...@suse.cz wrote: On Fri, Nov 07, 2014 at 10:07:43AM +0800, Gui Hecheng wrote: The @fi_args-num_devices in @get_fs_info() does not include seed devices. We could just correct it by searching the chunk tree and count how many dev_items there are in

Re: [PATCH 2/3] Btrfs-progs Add make archive

On 22 January 2013 17:22, Gene Czarcinski g...@czarc.net wrote: This adds the archive target to the Makefile which simply executes do-archive.sh. It also adds the remove of btrfs-progs.spec.in to I think you mean btrfs-progs.spec without the .in as that's the generated file. make clean.

Re: [PATCH] btrfs-progs: add '-b' option to filesystem df and show

On 20 February 2013 13:05, Audrius Butkevicius audrius.butkevic...@elastichosts.com wrote: On 01/02/2013 10:30, Hugo Mills wrote: On Fri, Feb 01, 2013 at 09:59:49AM +, Audrius Butkevicius wrote: Add '-b' and '--bytes' options to btrfs filesystem df and show, for easier integration with

Re: lvm volume like support

On 25 February 2013 23:35, Suman C schakr...@gmail.com wrote: Hi, I think it would be great if there is a lvm volume or zfs zvol type support in btrfs. As far as I can tell, there's nobody actively working on this feature. I want to know what the core developers think of this feature, is it

Re: [PATCH] btrfs-progs: add options for changing size representations

On 11 March 2013 10:12, Audrius Butkevicius audrius.butkevic...@elastichosts.com wrote: Add '--si', '-h'/'--human-readable' and '--block-size' global options, which allow users to customize the way sizes are displayed. Options and their format tries to mimic GNU ls utility. Signed-off-by:

Re: [PATCH v2 01/11] btrfs: Add barrier option to support -o remount,barrier

On 3 January 2014 06:10, Qu Wenruo quwen...@cn.fujitsu.com wrote: Btrfs can be remounted without barrier, but there is no barrier option so nobody can remount btrfs back with barrier on. Only umount and mount again can re-enable barrier.(Quite awkward) Also the mount options in the document

Re: [PATCH] btrfs-progs: optionally enforce chroot for btrfs receive

On 18 April 2015 at 14:59, Lauri Võsandi lauri.vosa...@gmail.com wrote: This patch forces btrfs receive to issue chroot before parsing the btrfs stream using command-line flag -C to confine the process and minimize damage that could be done via malicious btrfs stream. Signed-off-by: Lauri

btrfs-progs 4.1-rc1: btrfstune -u reporting incorrect current fsid?

Hi, I've done a quick test on changing the UUID of a btrfs. It worked, but btrfstune -u didn't print the same current uuid that btrfs fi sh does. It also upper cases the UUID where as btrfs fi sh and blkid don't. Thanks, Mike # btrfs filesystem show /dev/sdb1 | fgrep uuid Label: none uuid:

Re: btrfs replace seems to corrupt the file system

On 29 June 2015 at 09:08, Duncan 1i5t5.dun...@cox.net wrote: Meanwhile, unlike many filesystems, btrfs uses the UUID as part of the metadata, so changing the UUID isn't as simple as rewriting a superblock; the metadata must be rewritten to the new UUID. There's actually a tool now available

Re: [PATCH] Btrfs: fix file read corruption after extent cloning and fsync

On 19 August 2015 at 11:11, fdman...@kernel.org wrote: From: Filipe Manana fdman...@suse.com If we partially clone one extent of a file into a lower offset of the file, fsync the file, power fail and then mount the fs to trigger log replay, we can get multiple checksum items in the csum tree

Re: btrfs raid1 metadata, single data

On 7 August 2015 at 10:47, Sjoerd sjo...@sjomar.eu wrote: While we're at it: any idea why the default for SSD's is single for meta data as described on the wiki? (https://btrfs.wiki.kernel.org/index.php/Using_Btrfs_with_Multiple_Devices#Filesystem_creation) I was looking for an answer why my

Re: BTRFS as image store for KVM?

On 17 September 2015 at 18:56, Gert Menke wrote: > MD+LVM is very close to what I want, but md has no way to cope with silent > data corruption. So if I'd want to use a guest filesystem that has no > checksums either, I'm out of luck. > I'm honestly a bit confused here - isn't

Re: [PATCH v2 1/5] btrfs-progs: introduce framework to check kernel supported features

On 23 November 2015 at 12:56, Anand Jain wrote: > In the newer kernel, supported kernel features can be known from > /sys/fs/btrfs/features > however this interface was introduced only after 3.14, and most the > incompatible FS features were introduce before 3.14. > >

Re: commands like "du", "df", and "btrfs fs sync" hang

On 1 May 2016 at 13:47, Duncan <1i5t5.dun...@cox.net> wrote: > Direct from that section of my /etc/sysctl.conf: > > > # Virtual-machine: swap, write-cache Hi Duncan, You mean virtual memory. Quoting from the kernel

Re: [PATCH 0/7] cleanup __btrfs_map_block

On 18 February 2017 at 01:28, Liu Bo wrote: > This is attempting to make __btrfs_map_block less scary :) > > The major changes are > > 1) split operations for discard out of __btrfs_map_block and we don't copy > discard operations for the target device of dev replace since

Re: Small fs

On 12 September 2016 at 19:55, Austin S. Hemmelgarn wrote: > I'm not sure about gparted, but the default behavior for mkfs is as follows: > 1. Is the device rotational? (check /sys/block//rotational). If > not, do some extra stuff to try and ID it as an SSD. If it is an

Re: [PATCH] btrfs-progs: add dev stats returncode option

On 1 December 2016 at 18:43, Austin S. Hemmelgarn wrote: > Currently, `btrfs device stats` returns non-zero only when there was an > error getting the counter values. This is fine for when it gets run by a > user directly, but is a serious pain when trying to use it in a

Re: Free space missing

On 6 December 2016 at 12:40, Кравцов Роман Владимирович wrote: > Hello. > > Why 'BTRFS used size' and 'du -s' are different? > > > [root@OraCI2 ~]# btrfs --version > btrfs-progs v4.8.3 > [root@OraCI2 ~]# btrfs fi show /dev/nvme0n1 > Label: 'OLD_PES' uuid:

Re: [PATCH] btrfs-progs: allow "no" to disable compression for convenience

On 17 September 2017 at 01:36, Satoru Takeuchi wrote: > It's messy to use "" to disable compression. Introduce the new value "no" > which can also be used for this purpose. >From an English language point of view, "none" would be better. None says the absence of,

Re: notification about corrupt files from "btrfs scrub" in cron

On 23 November 2017 at 11:47, ST wrote: > >> > I have following cron job to scrub entire root filesystem (total ca. >> > 7.2TB and 2.3TB of them used) once a week: >> > /bin/btrfs scrub start -r / > /dev/null >> > >> > Such scrubbing takes ca. 2 hours. How should I get notified

Re: BTRFS and databases

On 1 August 2018 at 04:45, MegaBrutal wrote: > But there is still one question that I can't get over: if you store a > database (e.g. MySQL), would you prefer having a BTRFS volume mounted > with nodatacow, or would you just simply use ext4? > > I know that with nodatacow, I take away most of