diod server: infinite loop

[dnalor]

both client and server run Gentoo Linux

build (diod 1.1.0, gcc 15):

CFLAGS="-O2 -pipe -fomit-frame-pointer -march=native -mtune=native" ./configure --disable-auth --disable-config

run:

server (Linux odroidhc2 5.4.160-odroidxu4 SMP PREEMPT armv7l ARMv7 Processor rev 3 (v7l) SAMSUNG EXYNOS (Flattened Device Tree) GNU/Linux)

$ diod --listen=odroidhc2:9009 --no-auth --export=/usr/share -S -d 1

client (Linux hp-t630 6.12.58-gentoo SMP PREEMPT_DYNAMIC x86_64 AMD Embedded G-Series GX-420GI Radeon R7E AuthenticAMD GNU/Linux)

#  mount.diod -v odroidhc2:/usr/share -o version=9p2000.L,uname=luser,access=1002,port=9009,cache=loose,msize=1048576 /mnt/9p/
mount.diod: trying to connect to odroidhc2:9009
mount.diod: pre-authenticating connection to server
mount.diod: mount -t 9p odroidhc2:/usr/share /mnt/9p/ -oversion=9p2000.L,uname=luser,access=1002,cache=loose,msize=1048576,aname=/usr/share,trans=fd,debug=1,rwdepth=1,rfdno=3,wfdno=3
$  mount|grep 9p
odroidhc2:/usr/share on /mnt/9p type 9p (rw,relatime,debug=1,uname=luser,aname=/usr/share,cache=f,access=1002,msize=1048576,trans=fd,rfd=3,wfd=3)
$  ls /mnt/9p/ &> /tmp/9p.log
(client hangs until server killed)

server output:

Listening on odroidhc2:9009
Anyone can attach and access files as luser
No authentication is required
Tversion tag 65535 msize 1048576 version '9P2000.L'
Rversion tag 65535 msize 1048576 version '9P2000.L'
Tauth tag 0 afid 0 uname '' aname '/usr/share' n_uname 1002
Rlerror tag 0 ecode 2
Tattach tag 0 fid 0 afid -1 uname '' aname '/usr/share' n_uname 1002
Rattach tag 0 qid (0000000000020401 0 'd')
Tclunk tag 0 fid 0
Rclunk tag 0
Tversion tag 65535 msize 1048576 version '9P2000.L'
Rversion tag 65535 msize 1048576 version '9P2000.L'
Tattach tag 0 fid 0 afid -1 uname 'luser' aname '/usr/share' n_uname NONUNAME
Rattach tag 0 qid (0000000000020401 0 'd')
Tgetattr tag 0 fid 0 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (0000000000020401 0 'd') mode 040755 uid 0 gid 0 nlink 89 rdev 0 size 4096 blksize 4096 blocks 8 atime Fri Mar 31 16:56:04 2023 mtime Thu Oct  9 22:06:52 2025 ctime Thu Oct  9 22:06:52 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 1 nwname 0
Rwalk tag 0 nwqid 0 
Tlopen tag 0 fid 1 flags 04000
Rlopen tag 0 qid (0000000000020401 0 'd') iounit 0
Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 2842
80000000 00010402 00000000 00b7d065 02000000 00040100 2e800000 00000816 
02000000 00002bb7 c5020000 00000403 00676974 80000000 00d02a02 00000000 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
(last 4 lines repeat forever)

after killing the server, client output:

$  sort < /tmp/9p.log|uniq -c
      1 aclocal
      1 aclocal-1.16
   7171 aclocal-1.18
   7171 alsa
      1 applications
   7171 autoconf-2.72
   7171 automake-1.16
   7171 automake-1.16.5
      1 automake-1.18
   7171 automake-1.18.1
      1 awk
      1 baselayout
   7171 bash-completion
      1 binutils-data
      1 bison
      1 ca-certificates
      1 cmake
   7171 config.site
      1 config.site.d
   7171 consolefonts
   7171 consoletrans
   7171 crossdev
      1 dbus-1
      1 dejagnu
   7171 dhcpcd
   7171 dict
      1 doc
      1 dovecot
      1 elt-patches
   7171 emacs
      1 eselect
   7171 et
      1 ffmpeg
   7171 fish
      1 fonts
   7171 gcc-config
      1 gcc-data
   7171 gdb
      1 gettext
      1 gettext-0.23.2
      1 git
      1 git-core
      1 glib-2.0
   7171 gnuconfig
      1 groff
      1 gtk-doc
      1 i18n
      1 icons
   7171 icu
   7171 info
      1 iputils
      1 keymaps
   7171 libgpg-error
      1 libtool
   7171 locale
      1 ls: reading directory '/mnt/9p/': Connection reset by peer
   7171 man
      1 mc
      1 mikmod
      1 mime
      1 misc
   7171 nano
   7171 openpgp-keys
   7171 openrc
      1 pixmaps
      1 pkgconfig
      1 polkit-1
   7171 portage
   7171 push
   7171 re2c
   7171 sandbox
      1 sgml
   7171 shadowman
      1 sidplayfp
      1 smartmontools
   7171 sounds
   7171 ss
   7171 tabset
   7171 terminfo
      1 texi2any
   7171 texinfo
      1 timidity
      1 uade2
   7171 udhcpc
      1 unimaps
      1 vim
   7171 xml
      1 xmlto
      1 zoneinfo
   7171 zsh

Any suggestions would be welcome.

[garlick]

Thanks for taking the time to file this!

I guess this is 64 bit client and 32 bit server?

At a quick glance, I see old school long used as an offset in diod directory operations where modern off_t should be.

I'm not remembering why the second Treaddir call would have an offset of -1 (2^31-1 here, 2^63-1 on my test system) but that must be normal.

Also your files have either 1 block or 7171? That is suspicious.

[garlick]

I would guess on the server, off_t is 64 bits, while long is 32 bits. AFAIK, the dirent d_off value (an off_t) from the previous Rreaddir needs to become the offset to the next Treaddir. Since it is passed internally in a long, -1LL may get converted to -1L.

Maybe this will fix it?

diff --git a/src/libdiod/diod_ioctx.c b/src/libdiod/diod_ioctx.c
index 5dca9c9..adb9461 100644
--- a/src/libdiod/diod_ioctx.c
+++ b/src/libdiod/diod_ioctx.c
@@ -320,7 +320,7 @@ ioctx_seekdir (IOCtx ioctx, long offset)
  * taking the lock.
  */
 struct dirent *
-ioctx_readdir(IOCtx ioctx, long *offset)
+ioctx_readdir(IOCtx ioctx, u64 *offset)
 {
     struct dirent *d;
 
diff --git a/src/libdiod/diod_ioctx.h b/src/libdiod/diod_ioctx.h
index 55ab617..3c3d62e 100644
--- a/src/libdiod/diod_ioctx.h
+++ b/src/libdiod/diod_ioctx.h
@@ -30,7 +30,7 @@ int     ioctx_open (Npfid *fid, u32 flags, u32 mode);
 int     ioctx_close (Npfid *fid, int seterrno);
 int     ioctx_pread (IOCtx ioctx, void *buf, size_t count, off_t offset);
 int     ioctx_pwrite (IOCtx ioctx, const void *buf, size_t count, off_t offset);
-struct dirent *ioctx_readdir(IOCtx ioctx, long *new_offset);
+struct dirent *ioctx_readdir(IOCtx ioctx, u64 *new_offset);
 void    ioctx_rewinddir (IOCtx ioctx);
 void    ioctx_seekdir (IOCtx ioctx, long offset);
 int     ioctx_fsync (IOCtx ioctx, int datasync);
diff --git a/src/libdiod/diod_ops.c b/src/libdiod/diod_ops.c
index daa1972..3b57fcc 100644
--- a/src/libdiod/diod_ops.c
+++ b/src/libdiod/diod_ops.c
@@ -1141,7 +1141,7 @@ error_quiet:
 }
 
 static u32
-_copy_dirent_linux (Fid *f, struct dirent *d, long offset, u8 *buf, u32 buflen)
+_copy_dirent_linux (Fid *f, struct dirent *d, u64 offset, u8 *buf, u32 buflen)
 {
     Npqid qid;
     u32 ret = 0;
@@ -1169,7 +1169,7 @@ _read_dir_linux (Fid *f, u8* buf, u64 offset, u32 count)
 {
     struct dirent *d;
     int i, n = 0;
-    long new_offset;
+    u64 new_offset;
 
     if (offset == 0)
         ioctx_rewinddir (f->ioctx);

[dnalor]

I guess this is 64 bit client and 32 bit server?

yes

Also your files have either 1 block or 7171? That is suspicious.

sorry, should have been clearer: this lists the number of occurrences of a file sys entry listed by ls (note the sort < /tmp/9p.log|uniq -c)
I thought it is interesting that some are correct (e.g. aclocal-1.16), while others repeat (e.g. aclocal-1.18)

[dnalor]

I would guess on the server, off_t is 64 bits, while long is 32 bits. AFAIK, the dirent d_off value (an off_t) from the previous Rreaddir needs to become the offset to the next Treaddir. Since it is passed internally in a long, -1LL may get converted to -1L.

Maybe this will fix it?

I re-tested with this patch applied, but I don't see any difference:

Listening on odroidhc2:9009
Anyone can attach and access files as luser
No authentication is required
Tversion tag 65535 msize 1048576 version '9P2000.L'
Rversion tag 65535 msize 1048576 version '9P2000.L'
Tauth tag 0 afid 0 uname '' aname '/usr/share' n_uname 1002
Rlerror tag 0 ecode 2
Tattach tag 0 fid 0 afid -1 uname '' aname '/usr/share' n_uname 1002
Rattach tag 0 qid (0000000000020401 0 'd')
Tclunk tag 0 fid 0
Rclunk tag 0
Tversion tag 65535 msize 1048576 version '9P2000.L'
Rversion tag 65535 msize 1048576 version '9P2000.L'
Tattach tag 0 fid 0 afid -1 uname 'luser' aname '/usr/share' n_uname NONUNAME
Rattach tag 0 qid (0000000000020401 0 'd')
Tgetattr tag 0 fid 0 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (0000000000020401 0 'd') mode 040755 uid 0 gid 0 nlink 89 rdev 0 size 4096 blksize 4096 blocks 8 atime Fri Mar 31 16:56:04 2023 mtime Thu Oct  9 22:06:52 2025 ctime Thu Oct  9 22:06:52 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 1 nwname 0
Rwalk tag 0 nwqid 0 
Tlopen tag 0 fid 1 flags 04000
Rlopen tag 0 qid (0000000000020401 0 'd') iounit 0
Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 2842
80000000 00010402 00000000 00b7d065 02000000 00040100 2e800000 00000816 
02000000 00002bb7 c5020000 00000403 00676974 80000000 00d02a02 00000000 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 
(ad infinitum)

[garlick]

Ah sorry I misread that - yeah it's getting the same chunk of directories over and over, so it makes sense that there are dups in the output.

Thanks for testing.

Back to the drawing board I guess.

[garlick]

FYI I'm going offline for a few days for travel but next week I'll try to set up a 32 bit test environment to run this down.

[dnalor]

FYI I'm going offline for a few days for travel but next week I'll try to set up a 32 bit test environment to run this down.

No worries, and thanks for looking into it.
Let me know if I can help.

[garlick]

My test setup:

• Server: Linux pi3 6.12.47+rpt-rpi-v7 #1 SMP Raspbian 1:6.12.47-1+rpt1 (2025-09-16) armv7l GNU/Linux
• Client: Linux pop-os 6.17.4-76061704-generic #202510191616~1762410050~22.04~898873a SMP PREEMPT_DYNAMIC Thu N x86_64 x86_64 x86_64 GNU/Linux

I'm exporting / on the server and mounting it on the client with

$ sudo mount -t diod IP:/ /mnt

then running an ls of /mnt. That returns without getting stuck. Mine looks like this:

Treaddir tag 0 fid 2 offset 0 count 65512
Rreaddir tag 0 count 578
80000000 00022000 00000000 0070d447 05000000 00040300 65746380 00000000 
0b000000 00000000 fe0a7207 00000000 040a006c 6f73742b 666f756e 64800000 
Treaddir tag 0 fid 2 offset 2147483647 count 65512
Rreaddir tag 0 count 0

while yours looks like this:

Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 2842
80000000 00010402 00000000 00b7d065 02000000 00040100 2e800000 00000816 
02000000 00002bb7 c5020000 00000403 00676974 80000000 00d02a02 00000000 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 1281
80000000 00340b02 00000000 00d8b353 41000000 00040600 74616273 65748000 
0000006b 6f020000 00000008 185b4200 00000004 0c006163 6c6f6361 6c2d312e 

What is your host file system? I am using ext4 here.

Edit: also not reproduced with the same mount options as reported above

mount.diod -v $server:/usr/share -o version=9p2000.L,uname=garlick,access=5588,port=564,cache=loose,msize=1048576 /mnt/

The readdir still looks more or less the same

Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 4155
80000000 008e6e00 00000000 0028b947 02000000 00040b00 72617370 692d7574 
696c7380 00000000 6c6e0000 00000000 41d77502 00000000 0414006c 69626465 
Treaddir tag 0 fid 1 offset 2147483647 count 1048552
Rreaddir tag 0 count 0

[dnalor]

The host file system is ext4 as well. I also tried exporting a dir from another ext4-formatted device on the same system, which resulted in the same errors.
Details:

/dev/sda1 on /mnt/internal type ext4 (rw,noatime,lazytime)
/dev/mmcblk0p1 on / type ext4 (rw,noatime,lazytime)

I then tried exporting a tmpfs filesystem:

tmpfs on /mnt/tmpfs type tmpfs (rw,relatime,size=10240k)

and this does work:

Listening on odroidhc2:9009
Anyone can attach and access files as luser
No authentication is required
Tversion tag 65535 msize 1048576 version '9P2000.L'
Rversion tag 65535 msize 1048576 version '9P2000.L'
Tauth tag 0 afid 0 uname '' aname '/mnt/tmpfs' n_uname 1002
Rlerror tag 0 ecode 2
Tattach tag 0 fid 0 afid -1 uname '' aname '/mnt/tmpfs' n_uname 1002
Rattach tag 0 qid (000000000001a557 0 'd')
Tclunk tag 0 fid 0
Rclunk tag 0
Tversion tag 65535 msize 1048576 version '9P2000.L'
Rversion tag 65535 msize 1048576 version '9P2000.L'
Tattach tag 0 fid 0 afid -1 uname 'luser' aname '/mnt/tmpfs' n_uname NONUNAME
Rattach tag 0 qid (000000000001a557 0 'd')
Tgetattr tag 0 fid 0 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a557 0 'd') mode 041777 uid 0 gid 0 nlink 10 rdev 0 size 200 blksize 4096 blocks 0 atime Mon Dec 15 17:02:49 2025 mtime Mon Dec 15 17:02:49 2025 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 1 nwname 0
Rwalk tag 0 nwqid 0 
Tlopen tag 0 fid 1 flags 04000
Rlopen tag 0 qid (000000000001a557 0 'd') iounit 0
Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 291
80000000 0057a501 00000000 00010000 00000000 00040100 2e800000 000057a5 
01000000 00000200 00000000 00000402 002e2e80 00000000 12a80100 00000000 
Treaddir tag 0 fid 1 offset 10 count 1048552
Rreaddir tag 0 count 0
Treaddir tag 0 fid 1 offset 10 count 1048552
Rreaddir tag 0 count 0
Tclunk tag 0 fid 1
Rclunk tag 0
Twalk tag 0 fid 0 newfid 1 nwname 0
Rwalk tag 0 nwqid 0 
Tlopen tag 0 fid 1 flags 04000
Rlopen tag 0 qid (000000000001a557 0 'd') iounit 0
Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 291
80000000 0057a501 00000000 00010000 00000000 00040100 2e800000 000057a5 
01000000 00000200 00000000 00000402 002e2e80 00000000 12a80100 00000000 
Treaddir tag 0 fid 1 offset 10 count 1048552
Rreaddir tag 0 count 0
Treaddir tag 0 fid 1 offset 0 count 1048552
Rreaddir tag 0 count 291
80000000 0057a501 00000000 00010000 00000000 00040100 2e800000 000057a5 
01000000 00000200 00000000 00000402 002e2e80 00000000 12a80100 00000000 
Treaddir tag 0 fid 1 offset 10 count 1048552
Rreaddir tag 0 count 0
Twalk tag 0 fid 0 newfid 2 nwname 1 'share'
Rwalk tag 0 nwqid 1 (000000000001a812 0 'd')
Tgetattr tag 0 fid 2 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a812 0 'd') mode 040755 uid 0 gid 0 nlink 3 rdev 0 size 60 blksize 4096 blocks 0 atime Fri Mar 31 16:56:04 2023 mtime Sun Nov 17 20:39:10 2019 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 3 nwname 1 'sbin'
Rwalk tag 0 nwqid 1 (000000000001a80f 0 'd')
Tgetattr tag 0 fid 3 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a80f 0 'd') mode 040755 uid 0 gid 0 nlink 2 rdev 0 size 80 blksize 4096 blocks 0 atime Fri Mar 31 16:32:49 2023 mtime Fri Nov 25 20:27:28 2022 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 4 nwname 1 'portage-crossdev'
Rwalk tag 0 nwqid 1 (000000000001a3f6 0 'd')
Tgetattr tag 0 fid 4 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a3f6 0 'd') mode 040755 uid 250 gid 250 nlink 6 rdev 0 size 120 blksize 4096 blocks 0 atime Sun Mar 19 09:07:52 2023 mtime Sat Mar 20 19:27:11 2021 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 5 nwname 1 'portage'
Rwalk tag 0 nwqid 1 (000000000001a28a 0 'd')
Tgetattr tag 0 fid 5 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a28a 0 'd') mode 040755 uid 1000 gid 0 nlink 54 rdev 0 size 1080 blksize 4096 blocks 0 atime Fri Dec  8 21:21:34 2023 mtime Mon Sep  4 16:13:30 2023 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 6 nwname 1 'lib'
Rwalk tag 0 nwqid 1 (000000000001a27d 0 'd')
Tgetattr tag 0 fid 6 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a27d 0 'd') mode 040755 uid 0 gid 0 nlink 3 rdev 0 size 240 blksize 4096 blocks 0 atime Fri Mar 31 16:41:00 2023 mtime Thu Jul  6 17:22:39 2023 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 7 nwname 1 'include'
Rwalk tag 0 nwqid 1 (000000000001a243 0 'd')
Tgetattr tag 0 fid 7 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a243 0 'd') mode 040755 uid 0 gid 0 nlink 3 rdev 0 size 80 blksize 4096 blocks 0 atime Wed Jun 29 07:25:50 2022 mtime Thu Apr  8 20:55:40 2021 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 8 nwname 1 'etc'
Rwalk tag 0 nwqid 1 (000000000001a237 0 'd')
Tgetattr tag 0 fid 8 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (000000000001a237 0 'd') mode 040755 uid 0 gid 0 nlink 3 rdev 0 size 240 blksize 4096 blocks 0 atime Fri Mar 17 17:36:21 2023 mtime Fri Oct 24 09:58:38 2025 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Twalk tag 0 fid 0 newfid 9 nwname 1 'bin'
Rwalk tag 0 nwqid 1 (0000000000019f1c 0 'd')
Tgetattr tag 0 fid 9 request_mask 0x17ff
Rgetattr tag 0 valid 0x17ff qid (0000000000019f1c 0 'd') mode 040755 uid 0 gid 0 nlink 2 rdev 0 size 440 blksize 4096 blocks 0 atime Fri Mar 31 16:32:49 2023 mtime Mon Nov 24 20:20:50 2025 ctime Mon Dec 15 17:02:49 2025 btime X gen 0 data_version X
Treaddir tag 0 fid 1 offset 10 count 1048552
Rreaddir tag 0 count 0
Tclunk tag 0 fid 1
Rclunk tag 0
Tstatfs tag 0 fid 0
Rstatfs tag 0 type 16914839 bsize 4096 blocks 25600 bfree 13539 bavail 13539 files 187514 ffree 187021 fsid 0 namelen 255
Tstatfs tag 0 fid 0
Rstatfs tag 0 type 16914839 bsize 4096 blocks 25600 bfree 13539 bavail 13539 files 187514 ffree 187021 fsid 0 namelen 255
Twalk tag 0 fid 9 newfid 1 nwname 0
Rwalk tag 0 nwqid 0 

Copying files etc. works as well.