Disk quota for Jail. Discussion.

[Menshikov Konstantin]

Kostik Belousov wrote:
> On Tue, May 26, 2009 at 04:35:04PM +0400, Menshikov Konstantin wrote:
>   
>> Kostik Belousov wrote:
>>     
>>> On Tue, May 26, 2009 at 10:32:24AM +0400, Menshikov Konstantin wrote:
>>>       
>>>> In structure prison it is added structures containing disk quotas and 
>>>> usage.
>>>> At start Jail, we calculate the size root path and number of files in 
>>>> it, thus receiving current use of a disk.
>>>> In functions of allocation of disk blocks and inode, we check quotas and 
>>>> we increase current use.
>>>>    
>>>>         
>>> UFS cannot determine whether the new allocation goes under the jail
>>> root or not.
>>>  
>>>       
>> Yes. But jail cannot allocate block and inode above root path. In 
>> allocation functions, whether for example ffs_alloc we have access to 
>> ucred process and we can check up there is a process in jail.
>>     
>
> Yes, you can check this for jailed process. Think about non-jailed processes
> that can do allocation below the jail root.
>   
Processes out of jail are not considered.
I do not understand, these processes have what relation to disk to 
quotas for jail. Please explain more in detail