Data writting over the quota chage inote time

Data writting over the quota chage inote time

[Youza Youzovic]

I find this "small" problem:

I set quota fo user "test" to 204 blocks.
and store one big file "test" with full size ( 204 blocks).
quota -v test
Disk quotas for user test (uid 1010): 
Filesystem blocks quota limit grace files quota limit grace
/dev/sdb1 204* 204 204 1 0 0 

and run command "stat test":
File: "test"
Size: 204800 Blocks: 408 IO Block: 
121234234 Regular File
Device: 811h/2065d Inode: 6300 Links: 1 
Access: (0644/-rw-r--r--) Uid:(1010/test) Gid:(0/root)
Access: Wed Aug 13 16:10:21 2003
Modify: Wed Aug 13 16:12:43 2003
Change: Wed Aug 13 16:12:43 2003

next I run command

echo "s" >> test; stat test 
File: "test"
Size: 204800 Blocks: 408 IO Block: 
121234234 Regular File
Device: 811h/2065d Inode: 6300 Links: 1 
Access: (0644/-rw-r--r--) Uid: (1010/test) Gid:(0/root)
Access: Wed Aug 13 16:10:21 2003
Modify: Wed Aug 13 16:14:38 2003
Change: Wed Aug 13 16:14:38 2003

the size is not change - this is OK !!
But Modify, and Change time is modified !!!

My system:
Linux kernel 2.4.21 from www.kernel.org

Thanx
youza

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Re: Data writting over the quota chage inote time

[Sean Neakums]

"Youza Youzovic" <youza@post.cz> writes:

> echo "s" >> test; stat test 
> File: "test"
> Size: 204800 Blocks: 408 IO Block: 
> 121234234 Regular File
> Device: 811h/2065d Inode: 6300 Links: 1 
> Access: (0644/-rw-r--r--) Uid: (1010/test) Gid:(0/root)
> Access: Wed Aug 13 16:10:21 2003
> Modify: Wed Aug 13 16:14:38 2003
> Change: Wed Aug 13 16:14:38 2003
>
> the size is not change - this is OK !!
> But Modify, and Change time is modified !!!

ctime is the inode change time; it has nothing to do with quotas.  In
your example above, you wrote some data to a file, which resulted in
some of the inode's fields being updated, which resulted in the inode
change time being updated.

Re: Data writting over the quota chage inote time

[Sean Neakums]

Sean Neakums <sneakums@zork.net> writes:

... a bunch of crap.

Feel free to shoot me in the head.

 

Re: Data writting over the quota chage inote time

[Jan Kara]

  Hi,

  the problem actually isn't in quota but in VFS layer (you'd get same
result if you just run out of empty space on disk).  I actually also
looked into fixing this but it showed up to require rewriting of code on
a lot of places and so I postponed the problem because I find the
problem more or less cosmetic... Or do you have some application failing
on this?

								Honza 


> I find this "small" problem:
> 
> I set quota fo user "test" to 204 blocks.
> and store one big file "test" with full size ( 204 blocks).
> quota -v test
> Disk quotas for user test (uid 1010): 
> Filesystem blocks quota limit grace files quota limit grace
> /dev/sdb1 204* 204 204 1 0 0 
> 
> and run command "stat test":
> File: "test"
> Size: 204800 Blocks: 408 IO Block: 
> 121234234 Regular File
> Device: 811h/2065d Inode: 6300 Links: 1 
> Access: (0644/-rw-r--r--) Uid:(1010/test) Gid:(0/root)
> Access: Wed Aug 13 16:10:21 2003
> Modify: Wed Aug 13 16:12:43 2003
> Change: Wed Aug 13 16:12:43 2003
> 
> next I run command
> 
> echo "s" >> test; stat test 
> File: "test"
> Size: 204800 Blocks: 408 IO Block: 
> 121234234 Regular File
> Device: 811h/2065d Inode: 6300 Links: 1 
> Access: (0644/-rw-r--r--) Uid: (1010/test) Gid:(0/root)
> Access: Wed Aug 13 16:10:21 2003
> Modify: Wed Aug 13 16:14:38 2003
> Change: Wed Aug 13 16:14:38 2003
> 
> the size is not change - this is OK !!
> But Modify, and Change time is modified !!!
> 
> My system:
> Linux kernel 2.4.21 from www.kernel.org
> 
> Thanx
> youza
-- 
Jan Kara <jack@suse.cz>
SuSE CR Labs