example fail case is just 13 hard links. Even x4 that (16k blocks)
only gives 52 links for that example fail case.
The brief summary for those are:
* It's a rare corner case that needs a format change to fix, so won't-fix;
Definitely not won't-fix (see above).
Hugo.
--
=== Hugo
at 5532762525696
On 06/04/2012 07:49 AM, Hugo Mills wrote:
On Mon, Jun 04, 2012 at 07:43:40AM -0400, Maxim Mikheev wrote:
Hi Arne,
Can you advice how can I recover data?
I tried almost everything what I found on https://btrfs.wiki.kernel.org
/btrfs-restore restored some files
roots in order from largest generation id to smallest.
Given that it's not reporting any trees, though, I'm not certain that
you'll get any success with it.
Did you have your data in a subvolume?
Hugo.
On 06/04/2012 08:11 AM, Hugo Mills wrote:
On Mon, Jun 04, 2012 at 08:01:32AM -0400, Maxim
On Mon, Jun 04, 2012 at 06:04:22PM +0100, Hugo Mills wrote:
I'm out of ideas.
... but that's not to say that someone else may have some ideas. I
wouldn't get your hopes up too much, though.
At this point, though, you're probably looking at somebody writing
custom code to scan the FS
, strerror(-ret));
@@ -1698,7 +1706,6 @@ static int cmd_scrub_status(int argc, char **argv)
out:
free_history(past_scrubs);
free(di_args);
- close(fdmnt);
if (fdres -1)
close(fdres);
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net
-- can you be more specific here?
It would seem that if we can get to the bottom of that problem, you
won't have to muck around with your current set-up at all.
Hugo.
--
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PGP key: 515C238D from wwwkeys.eu.pgp.net
in
case? Thanks.
Try the modified exports as I suggested in the other part of the
thread first. If that turns out to be problematic still, then we can
discuss any migration strategies.
Hugo.
Jim Maloney
On 06/05/2012 01:04 PM, Hugo Mills wrote:
On Tue, Jun 05, 2012 at 06:19:00PM +0200
):
Makefile: use $(CC) as a compilers instead of $(CC)/gcc
Makefile: use $(MAKE) instead of hardcoded 'make'
Shawn Bohrer (1):
btrfs-progs: Update resize documentation
Wang Sheng-Hui (1):
btrfs-progs: cleanup: remove the redundant BTRFS_CSUM_TYPE_CRC32 macro def
--
=== Hugo Mills
) convert.o -lext2fs
-lcom_err $(LDFLAGS) $(LIBS)
... which seems to be what the second line you quoted is doing.
However, the third line with the problem looks like something out of
date. Possibly a mis-merge?
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk
to mis-merge
or check out the wrong branch.
Hugo.
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--- We are all lying in the gutter, but some of us are looking
was failing on.
Hugo.
[1]
http://git.darksatanic.net/cgi/gitweb.cgi?p=btrfs-progs-unstable.git;a=blob;f=Makefile;h=9699366d506918db711245aa771d103698a7;hb=integration-20120605
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somewhere.
Hugo.
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--- There's many a slip 'twixt wicket-keeper and gully. ---
signature.asc
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--- Happiness is mandatory. Are you happy? ---
signature.asc
Description: Digital signature
);
e = errno;
if(ret0){
Hugo.
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--- Your problem is that you've got too much taste to be ---
a web
])) {
+ if (len !isdigit(s[len - 1])) {
I think I'd prefer that len is a size_t, not an int here. (Or that
len is tested to be 0).
c = tolower(s[len - 1]);
switch (c) {
case 'g':
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk
On Wed, Jun 06, 2012 at 08:31:47PM +0100, Hugo Mills wrote:
@@ -378,6 +380,7 @@ static int cmd_snapshot(int argc, char **argv)
args.fd = fd;
strncpy(args.name, newname, BTRFS_SUBVOL_NAME_MAX);
+ args.name[BTRFS_PATH_NAME_MAX-1] = 0;
This, however, is wrong. args here
On Thu, Jun 07, 2012 at 09:38:13AM +0800, Sonu wrote:
Hi
Any clues on where I can find the function 'btrfs_header_level' in
btrfs-progs ?
It's a getter/setter pair. See line 1555 of ctree.h.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk
can answer my query.
I hav run these tests on SLES11-sp2-x86
Kernel 3.0.13.0.27-default
This is pretty old, but shouldn't affect the results. It will cause
reliability problems if you try running it seriously.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net
?
Are there any hints?
Wait for qgroups to land, because that actually does it the right
way, and will avoid you having to track all kinds of awkward (and
hard-to-find) corner cases.
Hugo.
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)= 0
rupert
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signature.asc
Description
at that. I know that
David Sterba looked at fixing it, but apparently it was trickier to
fix than was expected. (I don't recall the reason, and probably
wouldn't have understood it anyway, so I'll leave it to Dave to tell
you about it in detail).
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk
On Wed, Jun 20, 2012 at 08:59:15AM -0400, Josef Bacik wrote:
Hello,
Today is my last day at Red Hat, I will be joining Chris at Fusion IO.
Blimey. It's all change round here, isn't it? Congratulations.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk
to get an idea how much each snapshot
will free if I delete it?
When the relevant bit of qgroups lands, yes. Until then, not really.
Hugo.
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not sure if this is important to you, but
it's a significant difference between the btrfs implementation of
RAID-1 and the MD implementation.
Hugo.
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integration. If
you want to be helpful and test out new patches and report problems
with them, use integration.
Hugo.
Thanks,
Alex.
On Tue, Jun 5, 2012 at 10:09 PM, Hugo Mills h...@carfax.org.uk wrote:
I've just pushed out a new integration branch to my git repo. This
is purely bugfix
appropriate?
Yeah, basically, it's doing something silly and unexpected with
return codes.
Hugo.
[SNIP]
if (errors) {
fprintf(stderr, total %d failures\n, errors);
exit(1);
}
free(av);
return errors + 20;
[SNIP]
Thanks!
--
=== Hugo Mills: hugo@... carfax.org.uk
by a set of macros. Look for the *_SETGET_* macros.
The actual definitions of BTRFS_SETGET_FUNCS are in struct-funcs.h
Hugo.
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--- Great
a date in their package names --
anything from 20120328 or so is good.
Hugo.
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--- Charting the inexorable advance of Western syphilisation
good.
Hugo.
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--- You stay in the theatre because you're afraid of having no ---
money? There's irony
happened in this case, but it's best to try to
avoid these kinds of issues).
Hugo.
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--- emacs: Eats Memory and Crashes
will probably support n-copies DUP as well.
There's no reason particularly to restrict it that way.
Hugo.
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--- Do not meddle in the affairs
.
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--- But people have always eaten people, / what else is there to ---
eat? / If the Juju had meant us not to eat people / he
.
Hugo.
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--- Someone's been throwing dead sheep down my Fun Well ---
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will report something along the lines of directory isize
wrong, and the problem can be fixed by running a btrfs check
--repair. If you get anything else from btrfs check (or it checks
cleanly), then let us know first.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk
Debian Developer
GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13
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far wrong. It's not quite true:
some options do work on a per-mount basis, but most are
per-filesystem. I'm sure there was a list of them on the wiki at some
point, but I can't seem to track it down right now.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk
, used=24.00KiB
Metadata, DUP: total=1.00GiB, used=520.36MiB
unknown, single: total=176.00MiB, used=0.00
# btrfs --version
Btrfs v3.14.2
# uname -r
3.15.5-200.fc20.x86_64
TIA, kind regards.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key
\
fe80::/64
/srv/nfs/video-ro,async,fsid=0x1731,no_subtree_check \
10.0.0.0/24 fe80::/64
Hugo.
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On Thu, Jul 17, 2014 at 01:02:06PM +, philippe.simo...@swisscom.com wrote:
Hi Hugo
-Original Message-
From: Hugo Mills [mailto:h...@carfax.org.uk]
Sent: Thursday, July 17, 2014 1:13 PM
To: Simonet Philippe, INI-ON-FIT-NW-IPE
Cc: linux-btrfs@vger.kernel.org
Subject: Re
[this time, to the mailing list as well]
On Fri, Jul 25, 2014 at 09:02:44AM +0100, Hugo Mills wrote:
On Thu, Jul 24, 2014 at 11:06:34PM -0400, Nick Krause wrote:
On Thu, Jul 24, 2014 at 10:32 PM, Duncan 1i5t5.dun...@cox.net wrote:
[snip]
Hey Duncan and others ,
I have read
. Some of the time, you will actually
answer your own question by trying to ask it in a sensible way. If you
find that happening, you're asking sensible questions.
Hugo.
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.
Hugo.
--
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--- Alert status mauve ocelot: Slight chance of brimstone. Be ---
prepared to make a nice cup of tea
here). Accept that there are no easy one-liners in
the kernel. The path to writing your first kernel patch is *hard*.
Don't give up at the first hint that each thing isn't going to be
solved in 5 minutes.
Hugo.
--
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PGP
and easily).
Hugo.
--
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--- You've read the project plan. Forget that. We're going to Do ---
Stuff and Have Fun doing
you're not listening to advice, and you're not apparently learning
anything from the feedback you're given. Your behaviour is not
changing over time, which makes you look like a waste of time to all
those people trying to help you.
Hugo.
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the line unsubscribe linux-btrfs in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
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nothing else until you can answer all three of those
questions sensibly.
Hugo.
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--- Great films about cricket: 200/1: A Pace Odyssey
On Thu, Jul 31, 2014 at 09:53:15PM -0400, Nick Krause wrote:
On Thu, Jul 31, 2014 at 3:09 PM, Hugo Mills h...@carfax.org.uk wrote:
On Thu, Jul 31, 2014 at 01:53:33PM -0400, Nicholas Krause wrote:
This adds checks for the stated modes as if they are crap we will return
error
not supported
.
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--- You stay in the theatre because you're afraid of having no ---
money? There's irony
On Mon, Aug 04, 2014 at 11:31:57AM +0100, Peter Waller wrote:
Thanks Hugo, this is the most informative e-mail yet! (more inline)
On 4 August 2014 11:22, Hugo Mills h...@carfax.org.uk wrote:
* btrfs fi show
- look at the total and used values. If used total, you're OK
.
One thing I didn't find any information about is the overhead
introduced by mixied-mode.
It would be great if you could explain it in a few sentences.
I don't know, I'm afraid. I don't think we've got any benchmarks on
the scale of the slowdown.
Hugo.
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5, 10, 20, 50, 80.
Hugo.
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actually doing what the original author intended? If
so, what was that intent?
Hugo.
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--- UNIX: Italian pen maker
is to
balance the data usage evenly across multiple devices. (Actually, to
balance the available space evenly).
Also note that the data part isn't tree-structured, so referring to
balancing the trees with a -d flag is doubly misleading. :)
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk
the machine? Yes.
* How can I resume or cancel the scrub?
It's probably simply not running -- see above.
* Is it more risky to leave the above errors uncorrected, or to run
btrfsck with --repair?
I would, I think, leave them.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk
the user to perform that matching correctly.
Signed-off-by: Hugo Mills h...@carfax.org.uk
---
btrfs-list.c | 32 +++-
btrfs-list.h | 2 ++
cmds-subvolume.c | 6 +-
3 files changed, 34 insertions(+), 6 deletions(-)
diff --git a/btrfs-list.c b/btrfs-list.c
below, not bellow
Signed-off-by: Hugo Mills h...@carfax.org.uk
---
cmds-subvolume.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/cmds-subvolume.c b/cmds-subvolume.c
index 5216e53..349d0db 100644
--- a/cmds-subvolume.c
+++ b/cmds-subvolume.c
@@ -390,7 +390,7 @@ static const
the user to perform that matching correctly.
Signed-off-by: Hugo Mills h...@carfax.org.uk
---
v1 - v2: Update man page as well.
Documentation/btrfs-subvolume.txt | 2 ++
btrfs-list.c | 32 +++-
btrfs-list.h | 2 ++
cmds
##_to_cpu(*__tmp); \
+ *v = get_unaligned_le##bits(__tmp); \
} while (0)
#define TLV_GET_U8(s, attr, v) TLV_GET_INT(s, attr, 8, v)
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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to calculate the used vs free values for df.
Hugo.
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--- Great films about cricket: Umpire of the Rising Sun ---
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about that.
Hugo.
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On Wed, Sep 03, 2014 at 04:53:39AM +, Duncan wrote:
Hugo Mills posted on Tue, 02 Sep 2014 13:13:49 +0100 as excerpted:
On Tue, Sep 02, 2014 at 12:05:33PM +, Holger Hoffstätte wrote:
So where does the confusing initial display come from? [I] don't
remember ever seeing
of them.
Hugo.
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--- You can get more with a kind word and a two-by-four than you ---
can with just a kind word
above will only touch chunks with 5% actual
data or less). This is in the FAQ.
Hugo.
Metadata: total=8.00MB, used=0.00
: total=200.00MB, used=0.00
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on every disk in the array shouldn't matter.
N-way mirroring is in the queue for after RAID5/6 work; ideally, once it
is ready, mkfs should default to one copy per disk in the filesystem.
Why change the default from 2-copies, which it's been for years?
Hugo.
--
=== Hugo Mills: hugo
On Thu, Sep 11, 2014 at 08:06:21AM -0400, Austin S Hemmelgarn wrote:
On 2014-09-11 07:38, Hugo Mills wrote:
On Thu, Sep 11, 2014 at 07:19:00AM -0400, Austin S Hemmelgarn wrote:
On 2014-09-11 02:40, Russell Coker wrote:
Also it would be nice if there was a N-way mirror option for system data
in production, is running
btrfs on top of mdraid the way to go at this point?
Using btrfs native RAID means that you get independent checksums on
the two copies, so that where the data differs between the copies, the
correct data can be identified.
Hugo.
--
=== Hugo Mills: hugo
On Sun, Sep 14, 2014 at 05:15:08AM +0200, Piotr Pawłow wrote:
On 12.09.2014 12:47, Hugo Mills wrote:
I've done this before, by accident (pulled the wrong drive, reinserted
it). You can fix it by running a scrub on the device (btrfs scrub
start /dev/ice, I think).
I'd like to remind everyone
is KiB (upper case), SI is kB (lower case). Other than that, the UI
looks pretty comfortable to me.
Reviewed-by: Hugo Mills h...@carfax.org.uk
---
I tried to make the command line UI rich enough to address current and future
needs, I'm open to tweaks, rewording etc.
The patch is based
.
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--- I will not be pushed, filed, stamped, indexed, briefed, ---
debriefed or numbered. My life is my own
taking action on the basis of information in this e-mail or
any attachments. The DRW Companies make no representations that this e-mail
or any attachments are free of computer viruses or other defects.
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in participating, or even
just using it, please let me know.
Thanks to everyone who has worked on BTRFS so far ;-)
James
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--- How do you
On Sat, Sep 27, 2014 at 06:33:58PM +0200, James Pharaoh wrote:
On 27/09/14 18:17, Hugo Mills wrote:
On Sat, Sep 27, 2014 at 05:39:07PM +0200, James Pharaoh wrote:
2. Duplicating NOCOW files
This is obviously possible, since it takes place when you make a snapshot.
So why can't I create
Is there anyway to delete this partial subvol?
Thanks,
Justin
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--- All hope abandon, Ye who press Enter here. ---
signature.asc
.
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--- ... one ping(1) to rule them all, and in the ---
darkness bind(2) them
, but I've just checked, and it doesn't seem to have the
subvol in it on my server (3.16.2).
Hugo.
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--- Unix: For controlling fungal diseases
-it fixes yet, but
if so, that's the first /I/ remember reading of it.
Other than that detail, what you posted matches my knowledge and
experience, such as it may be as a non-dev list regular, as well.
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PGP key
testing to
see how 'read-only' mounting a btrfs filesystem really is.
If the FS is RO, then yes, it won't fix things.
Hugo.
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--- Great
the file will only read one of the
copies of any given block (so if that's good and the other copy is
bad, it won't fix anything).
Hugo.
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PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
somewhere.
I wouldn't put it in those words, but yes, a single CoW operation
occurs on writes to data with nodatacow set.
Hugo.
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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- There's
at all,
so you can't get a list of blocks on an underlying device because
there isn't one. Indirecting the accesses through the filesystem,
however, allows us to side-step btrfs's problems with part (b) above,
and in theory gives us swapfile capability.
Hugo.
--
=== Hugo Mills: hugo
On Wed, Oct 22, 2014 at 01:39:58PM -0700, Robert White wrote:
On 10/22/2014 01:25 PM, Hugo Mills wrote:
The new code is the swap-on-NFS infrastructure, which indirects
swapfile accesses through the filesystem code. The reason you have to
do that with NFS is because NFS doesn't expose
, I haven't experienced any.
If you make read-only snapshots, there's a good chance of metadata
corruption. It's fixed in 3.17.2.
Hugo.
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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
1.62GiB
devid1 size 6.52GiB used 2.24GiB path /dev/sda3
Btrfs v3.12
# btrfs fi df /
Data, single: total=1.98GiB, used=1.58GiB
System, single: total=4.00MiB, used=16.00KiB
Metadata, single: total=264.00MiB, used=36.03MiB
--
=== Hugo Mills: hugo@... carfax.org.uk
used 1.62GiB
devid1 size 6.52GiB used 2.24GiB path /dev/sda3
Btrfs v3.12
# btrfs fi df /
Data, single: total=1.98GiB, used=1.58GiB
System, single: total=4.00MiB, used=16.00KiB
Metadata, single: total=264.00MiB, used=36.03MiB
--
=== Hugo Mills: hugo@... carfax.org.uk
, but will still help to keep the number of
extents down. That will reduce the metadata overhead.
That's about all there is for btrfs-specific options, I think.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net
bring the system
down if you access the broken data. But you're safe with 3.17.2, so
it's a moot point for you right now.
Hugo.
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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
not
support newer kernel features -- but that will simply mean you can't
access the feature, not that anything will be broken.
If you're doing recovery work (btrfs check and friends) then using
the latest released version of the tools is strongly recommended.
Hugo.
--
=== Hugo Mills: hugo
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- Strive for apathy! ---
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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- Great films about cricket: Forrest Stump ---
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On Fri, Nov 14, 2014 at 05:00:26PM -0500, Josef Bacik wrote:
On 11/14/2014 04:51 PM, Hugo Mills wrote:
Chris, Josef, anyone else who's interested,
On IRC, I've been seeing reports of two persistent unsolved
problems. Neither is showing up very often, but both have turned up
often
On Mon, Nov 17, 2014 at 11:59:48AM +0100, Konstantin wrote:
Josef Bacik wrote on 14.11.2014 at 23:00:
On 11/14/2014 04:51 PM, Hugo Mills wrote:
[snip]
Problem 2: Unexplained zeroes
Failure to mount. Transid failure, expected xyz, have 0. Chris
looked at an early one of these (for Ke
the
partition, and then resizing the FS back up to fit the partition
exactly (with btrfs fi resize n:max).
Hugo.
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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- Stick them
/biggie/BACKUP/, is there a different way I should go about
sending an entire disk?
Thanks!
-Ken
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- ©1973 Unclear Research Ltd
under some circumstances.
Hugo.
--
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk
--- And what rough beast, its hour come round at last / slouches ---
towards Bethlehem
, for example :) ). For userspace, probably the latest -rc
tag from kdave's repo.
See https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories
Hugo.
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=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http
could see this possibly being useful for having fewer false
positives when using the inbuilt checksums for purposes of dedup.
Hugo.
--
Hugo Mills | That's not rain, that's a lake with slots in it
hugo@... carfax.org.uk |
http://carfax.org.uk/ |
PGP: 65E74AC0
set to a
single value by default (e.g. through a shall alias).
Hugo.
--
Hugo Mills | I will not be pushed, filed, stamped, indexed,
hugo@... carfax.org.uk | briefed, debriefed or numbered.
http://carfax.org.uk/ | My life is my own.
PGP: 65E74AC0
the
default subvol, you still can't delete it.
Hugo.
--
Hugo Mills | People are too unreliable to be replaced by
hugo@... carfax.org.uk | machines.
http://carfax.org.uk/ |
PGP: 65E74AC0 | Nathan Spring, Star Cops
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