Re: [Qemu-devel] Fail to share Samba directory with guest

[Jun Koi]

On Thu, Mar 1, 2012 at 6:21 PM, Jan Kiszka <address@hidden> wrote:
>
>
> Jun Koi <address@hidden> schrieb:
>
>>On Thu, Mar 1, 2012 at 5:59 PM, Jan Kiszka <address@hidden> wrote:
>>> On 2012-03-01 05:21, Jun Koi wrote:
>>>> On Tue, Feb 28, 2012 at 9:43 AM, Jun Koi <address@hidden>
>>wrote:
>>>>> On Tue, Feb 28, 2012 at 12:08 AM, Shu Ming
>><address@hidden> wrote:
>>>>>> On 2012-2-27 17:21, Jun Koi wrote:
>>>>>>>
>>>>>>> hi,
>>>>>>>
>>>>>>> on qemu 1.0.1, i am trying to share a host directory with the
>>Windows
>>>>>>> guest like below:
>>>>>>>
>>>>>>> qemu-system-i386 -enable-kvm -m 1000 -net nic,model=rtl8139 -net
>>>>>>> user,smb=/tmp img.winxp
>>>>>>>
>>>>>>> but in the guest, \\10.0.2.4 doesnt show me any shared directory.
>>>>>>>
>>>>>>> i already run Samba on the host (default configuration).
>>>>>>>
>>>>>>> did i miss something, or is it a bug??
>>>>>>
>>>>>>
>>>>>> So 10.0.2.4 is your host IP with samba server?   And what's the
>>network the
>>>>>> guest belongs to?
>>>>>>
>>>>>
>>>>> according to some network schemes used by Qemu, 10.0.2.4 is the IP
>>of
>>>>> the Samba server (DHCP: 10.0.2.2, DNS: 10.0.2.3, Samba: 10.0.2.4)
>>>>>
>>>>> http://en.wikibooks.org/wiki/QEMU/Networking
>>>>>
>>>>> i tried \\10.0.2.2, but dont see any share folder, either.
>>>>
>>>> i tested again, and again, but Samba sharing folder never work for
>>me.
>>>> meanwhile, my guest can see the folder shared configured in
>>/etc/samba/smb.conf
>>>>
>>>> so this is definitely a bug. perhaps the Samba setting in
>>net/slirp.c is wrong?
>>>> the current configuration is like below. i am not experienced with
>>>> Samba, so cannot figure out what is wrong.
>>>>
>>>> btw, it seems the Qemu unittest ignore this sharing folder testing?
>>>>
>>>> thanks,
>>>> Ju
>>>>
>>>>
>>>> // from net/slirp.c, function slirp_smb()
>>>>        fprintf(f,
>>>>             "[global]\n"
>>>>             "private dir=%s\n"
>>>>             "smb ports=0\n"
>>>>             "socket address=127.0.0.1\n"
>>>>             "pid directory=%s\n"
>>>>             "lock directory=%s\n"
>>>>             "log file=%s/log.smbd\n"
>>>>             "smb passwd file=%s/smbpasswd\n"
>>>>             "security = share\n"
>>>>             "[qemu]\n"
>>>>             "path=%s\n"
>>>>             "read only=no\n"
>>>>             "guest ok=yes\n",
>>>>             s->smb_dir,
>>>>             s->smb_dir,
>>>>             s->smb_dir,
>>>>             s->smb_dir,
>>>>             s->smb_dir,
>>>>             exported_dir
>>>>             );
>>>>
>>>>
>>>
>>> Works fine here with samba 3.5.7 (from OpenSuse 11.4) and a Linux
>>guest.
>>> What's your samba version? What's your guest?
>>
>>this is samba 3.4.7, on Ubuntu 10.4. and the guest is Windows XP,
>>latest update.
>>
>>>
>>> Also, you said you are running another samba on the host. What
>>changes
>>> if you stop it temporally?
>>
>>another samba? i dont understand. i mean i am running smbd on the
>>host, and that is the only samba i run.
>>if i stop that, how can the guest still see the samba folder?
>>
>>or do you mean that there is internal samba built-in inside Qemu, and
>>Samba on the host must be off?
>>that doesnt seem so, because ./configure always looks for the smbd at
>>compilation process.
>
> Qemu forks off a dedicated smbd, you don't need to worry about it. In theory, 
> there should be no conflict with a smbd run "normally" on the host as well, I 
> just like to exclude this possibility.

ok, i stopped smbd, but that doesnt help.

do we need to have root privilege for this -smb option? because it
seems smbd need to access to secrets.tdb file, which is for root only.

thanks,
Jun