Re: [Qemu-devel] [PATCH-V7 09/10] virtio-9p: Implement Security model for mknod

["Venkateswararao Jujjuri (JV)" <jvrao@linux.vnet.ibm.com>]

Anthony Liguori wrote:
> On 06/14/2010 03:34 PM, Venkateswararao Jujjuri (JV) wrote:
>> Mapped mode stores extended attributes in the user space of the extended
>> attributes. Given that the user space extended attributes are available
>> to regular files only, special files are created as regular files on the
>> fileserver and appropriate mode bits are added to the extended
>> attributes.
>> This method presents all special files and symlinks as regular files
>> on the
>> fileserver while they are represented as special files on the guest
>> mount.
>>
>> On Host/Fileserver:
>> -rw-------. 1 virfsuid virtfsgid 0 2010-05-11 09:36 afifo
>> -rw-------. 1 virfsuid virtfsgid 0 2010-05-11 09:32 blkdev
>> -rw-------. 1 virfsuid virtfsgid 0 2010-05-11 09:33 chardev
>>
>> On Guest/Client:
>> prw-r--r-- 1 guestuser guestuser 0 2010-05-11 12:36 afifo
>> brw-r--r-- 1 guestuser guestuser 0, 0 2010-05-11 12:32 blkdev
>> crw-r--r-- 1 guestuser guestuser 4, 5 2010-05-11 12:33 chardev
>>
>> In the passthrough securit model, specifal files are directly created
>> on the fileserver. But the user credential
>>
>> Signed-off-by: Venkateswararao Jujjuri<jvrao@linux.vnet.ibm.com>
>> ---
>>   hw/file-op-9p.h      |    2 +-
>>   hw/virtio-9p-local.c |   34 ++++++++++++++++++++++++++++++++--
>>   hw/virtio-9p.c       |   14 ++++++++++----
>>   3 files changed, 43 insertions(+), 7 deletions(-)
>>
>>
>>   static int local_mksock(FsContext *ctx2, const char *path)
>> diff --git a/hw/virtio-9p.c b/hw/virtio-9p.c
>> index 1a25e96..d276db3 100644
>> --- a/hw/virtio-9p.c
>> +++ b/hw/virtio-9p.c
>> @@ -160,9 +160,15 @@ static int v9fs_do_chmod(V9fsState *s, V9fsString
>> *path, mode_t mode)
>>       return s->ops->chmod(&s->ctx, path->data,&cred);
>>   }
>>
>> -static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode,
>> dev_t dev)
>> +static int v9fs_do_mknod(V9fsState *s, V9fsCreateState *vs, mode_t mode,
>> +        dev_t dev)
>>   {
>>    
> 
> You've added this function *before* you actually declare V9fsCreateState
> which is happening way down before v9fs_post_create().
> 
> Did you actually build these patches before sending them to the list?

Yes I did. This patch series is built on the following two patches. 
Please apply these two patches before taking this patch series.

[PATCH-V2] [virtio-9p] Flush the debug message out to the log file.
(http://lists.gnu.org/archive/html/qemu-devel/2010-06/msg00255.html)

[PATCH] virtio-9p: Rearrange fileop structures
(http://lists.gnu.org/archive/html/qemu-devel/2010-06/msg00143.html)


Sorry for the confusion.

- JV


> 
> Regards,
> 
> Anthony Liguori
>