gmane.comp.file-systems.fuse.sshfs

Re: sshfs gives an I/O error

Miklos Szeredi — 2012-05-14T13:26:23


Can you please post the debug output you get with the
"-odebug,sshfs_debug" options?

Thanks,
Miklos

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sshfs gives an I/O error

Bart Friederichs — 2012-05-03T09:54:12

Hi

I am not following the list, but thought I'd remind you of this issue:

When I want to mount using sshfs as remote root, it mounts fine, but I get
an I/O error when trying to read anything:

bf< at >desktop-bf:~/SSHNetwork$ sshfs -o allow_other root< at >intranet:/var/www
Frodoweb/
root< at >intranet's password:
bf< at >desktop-bf:~/SSHNetwork$ ls -la
ls: cannot access Frodoweb: Input/output error

When I use a normal user, it seems to work fine.

When I add a trialing slash, the whole thing works fine:

bf< at >desktop-bf:~/SSHNetwork$ sshfs -o allow_other root< at >intranet:/var/www/
Frodoweb/
root< at >intranet's password:
bf< at >desktop-bf:~/SSHNetwork$ ls -la
total 64
...

I am using:
bf< at >desktop-bf:~/SSHNetwork/Frodoweb$ sshfs --version
SSHFS version 2.3
FUSE library version: 2.8.6
fusermount version: 2.8.6
using FUSE kernel interface version 7.12

On Ubuntu 12.04.

Regards,
Bart Friederichs
technisch buro west-brabant b.v.
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Re: cp moves content to host

Mike Kelly — 2012-04-26T15:16:32

I'd think the FAQ is just incomplete there. A move shouldn't have to 
move any data "over the wire", but a copy would. The cp command doesn't 
have a system call it uses to make the copy. It just opens the old file 
for reading, the new file for writing, and writes the data. The mv 
command, though, can use the rename(2) command when staying on the same 
filesystem, and that is implemented in sshfs, so that it's done on the 
remote end, without having to read all the data.

--
Mike Kelly

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cp moves content to host

Daniel Milde — 2012-04-26T08:42:33

Hello Miklos,
I just found out that SSHFS moves files from server to host when I run
copy command. According to FAG it shouldn't:
http://sourceforge.net/apps/mediawiki/fuse/index.php?title=SshfsFaq

Example:

sshfs host: data
cd data
time cp etc.tgz etc1.tgz

Output:
real1m15.335s
user0m0.000s
sys0m0.040s

The file etc.tgz has about 50MB and it takes 2.673s when I run the same
command directly via SSH.

Is this bug or feature?

Thanks

Best regards
Daniel


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Re: Patch for remote permissions?

Miklos Szeredi — 2012-04-24T15:34:36


No problem, you can do something like

  "-osftp_server="/usr/lib/openssh/sftp-server -u0"

Does this help?

Thanks,
Miklos

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Re: Patch for remote permissions?

Alex Pyattaev — 2012-04-24T07:54:09

The problem iis that I can not access the ssh config on the server side. Also, 
i prefer when my user account has umask of 077. When I upload files to remote, 
whatever -oumask=M i supply, the files are uploaded with permissions based on 
my LOCAL umask. If I am mounting a common/shared folder, it is a problem. 
chmodding each file manually post-upload is not fun, so I was thinking maybe 
FUSE/sshfs could do that instead. For example, CIFS can do this kind of 
mapping.

What is the problem with chmod for each file after upload? Are there any other 
options? Also, AFAIK, Tectia ssh client has this sort of functionality, 
probably because windows does not have umasks, but still.
BR,
Alex.
tiistai 24 huhtikuu 2012 09:29:23 Miklos Szeredi kirjoitti:
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Re: patch

Miklos Szeredi — 2012-04-24T07:32:39


Thanks for the patch, this is already fixed in 2.9.0.

Thanks,
Miklos

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Re: Patch for remote permissions?

Miklos Szeredi — 2012-04-24T07:29:23


In its current form, no.  I don't like the chmod after open/mkdir.

What exactly do you need this for?

There's the -oumask=M option for sshfs.

There's the -u option for sftp-server (change the Subsystem line in
/etc/ssh/sshd_config to something like "Subsystem sftp
/usr/lib/ssh/sftp-server -u0").

The only thing missing is separate mask for files and directories.  Such
a patch I can accept for fuse.

Thanks,
Miklos

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patch

MTA — 2012-04-20T12:52:29

Hi
We use sshfs on the platform arm uclibc, her daemon
function does not work as it is implemented in the standard libc.
We offer a patch, which will work on all platforms.
Thank you very much.

Patch for remote permissions?

Alex Pyattaev — 2012-04-20T12:01:49

Hello!
there is an old patch in the internet here
http://andre.frimberger.de/wp-content/uploads/downloads/2010/08/sshfs-2.2-
permissions-workaround.patch.txt
which allows to specify fmask and dmask for the uploaded files in a way that 
is not dependent on the local user's umask setting. Is there any chance of 
this getting merged into the production version? If there is, I could port it 
to the current stable version and send it to you guys for commit.

I really need this kind of functionality, preferably yesterday, so let me know 
what you think.

Best regards,
Alex Pyattaev
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Re: Can't write to mounted SSHFS volume in Mac OS X 10.6.8

Miklos Szeredi — 2012-04-18T15:09:37


This mailing list is probably the wrong place to ask about sshfs issues
on OSX.  Please try asking on the OSXFUSE forum:

http://osxfuse.github.com/
https://groups.google.com/forum/#!forum/osxfuse-group

Thanks,
Miklos

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Can't write to mounted SSHFS volume in Mac OS X 10.6.8

Pen-Yuan Hsing — 2012-04-12T16:53:05

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Hello,

I installed SSHFS via MacPorts onto my system with Mac OS X 10.6.8. It
runs well and mounts a remote volume correctly.

While I can read from the mounted volume, I am not allowed to write
anything to it! This is even though I logged in with credentials that
have write access on the server.

My only theory is that my Mac is trying to write to the SSHFS with local
credentials, and not the remote user that actually has write access. Is
this correct? Or is it another problem?

In any case, would you be able to help me with troubleshooting this issue?

Thank you so much!

- - Pen-Yuan Hsing
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Re: gazzilion lookups when cd'ing into mountpoint + assuring responsiveness

Dieter Plaetinck — 2012-03-21T12:26:12

On Mon, 19 Mar 2012 18:13:47 +0100
Miklos Szeredi <miklos< at >szeredi.hu> wrote:


it's not a bash completion thing for git.
1) it happens when I execute "cd <mountpoint>", I do not press tab, I just paste the full path and type enter
2) same behavior with /bin/dash
3) it goes over many more files and directories, not just those beginning with .git

Dieter

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Re: gazzilion lookups when cd'ing into mountpoint +assuring responsiveness

Miklos Szeredi — 2012-03-19T17:13:47


Ah, that looks like a bash completion thing for git.  On my system it is
at /etc/bash_completion.d/git.sh.  And I have no idea how to enable or
disable it...

Thanks,
Miklos

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Re: gazzilion lookups when cd'ing into mountpoint + assuring responsiveness

Dieter Plaetinck — 2012-03-19T14:59:19

On Mon, 19 Mar 2012 15:20:59 +0100
Miklos Szeredi <miklos< at >szeredi.hu> wrote:


yes, so this is the log of mounting and cd'ing into the mount (cd happens in a different terminal)
http://pastie.org/3628477
I cut it off at some point, because it just goes on and on for -I think- every single file in the mount.

Dieter

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Re: gazzilion lookups when cd'ing into mountpoint +assuring responsiveness

Miklos Szeredi — 2012-03-19T14:20:59


No ideas.  Can you send the debug log when entering the directory:

  sshfs -d -osshfs_debug ...

Thanks,
Miklos

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Re: gazzilion lookups when cd'ing into mountpoint + assuring responsiveness

Dieter Plaetinck — 2012-03-19T13:56:35

On Mon, 19 Mar 2012 14:49:10 +0100
Miklos Szeredi <miklos< at >szeredi.hu> wrote:


this doesn't seem to be the case:
$ echo $LD_LIBRARY_PATH

$ echo "a${LD_LIBRARY_PATH}b"
ab
any other idea?


I see..

thanks

Dieter


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Re: gazzilion lookups when cd'ing into mountpoint +assuring responsiveness

Miklos Szeredi — 2012-03-19T13:49:10


This usually happens if LD_LIBRARY_PATH contains an entry for "."


No, this would need support in the sftp-server and int the protocol.
Extending the protocol is theoretically possible, but I don't think
such extension makes sense, it's too far from the original purpose of
SFTP.

Thanks,
Miklos

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gazzilion lookups when cd'ing into mountpoint + assuring responsiveness

Dieter Plaetinck — 2012-03-15T13:18:22

Hi,
I've used sshfs with success in various previous use cases,
although I'm now having an issue I haven't seen before.
I mount the sshfs like so:
sshfs -d -o debug -o idmap=user $server:/home/dieter/public_html/master /home/dieter/workspaces/eclipse/master

I can ls the contents of the mountpoint well, and read files, but as soon as I want to cd into the mount,
sshfs seems to perform a LOOKUP/getattr for pretty much every single file contained within the remote directory (recursively).
This causes the cd call to stall.

My other question is, how is responsiveness assured? I know sshfs performs predictive readahead and caching, but when are caches invalidated?
Does sshfs use something like inotify?
I'm working on a remote codebase (editing it locally, but storing and running it remotely, although a full local cache is acceptable)
and I'm considering two options.  One is just using sshfs.  The other one is more involved but possibly more responsive:
I would just do an initial rsync of the directory to my loca

Re: sshfs client on Android (with Dropbear)?

Miklos Szeredi — 2012-03-14T13:21:26


Only on the server side, obviously.

Thanks,
Miklos

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sshfs client on Android (with Dropbear)?

Dimitry Golubovsky — 2012-03-10T14:18:34

Hi,

I am trying to port sshfs to Android. Android uses dropbear as ssh
implementation therefore no sftp on the client side. The host I want
to connrct to surely has "normal" openssh.

Is it necessary to have the sftp program at client side in order to
use sshfs, or is it only the server requirement to have sftp-server?

Thanks.