Re: Bug : reuse same inode

[Philippe CHATAIGNON <liste-ZXOCcuNttmoBe96aLqz0jA@public.gmane.org>]

Le Tue, 08 Feb 2011 20:42:30 +0900 (JST),
Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org> a écrit :

> Hi,
> 
> Thank you for the detail report!  It's really helpful.
> 
> I understood the zero link count inode was causing a chain reaction.
> 
> And the inode in question at cp15731 also seems to be overridden
> because gid, size, and timestamp all differs from that file at
> cp15730.
> 
> > cp15730
> > -------
> > mnt/snap5/cut:
> > total 4
> > 14 -rw-r--r-- 1 philippe 1000 47 25 janv. 22:33
> > f5_20110125_202053.ts(0).Xcl
> 
> > cp15731
> > -------
> > mnt/snap7/cut:
> > total 9223372036848683032
> > 14 -rw-r--r-- 0 philippe users 6214528000 24 janv. 01:30
> > f5_20110125_202053.ts(0).Xcl
> 
> Can't you find another file with the inode number 14 in the snapshot
> cp15731 or cp15730 ?
> 
> I reviewed back unlink() implementation, but haven't found any issues
> so far.  The problem may be rooted much deeper.
> 
> 'stat' command may give us much information than 'ls -l' in this case.

Hi,
in my previous mail, ls -li ** give all the files in the filesystem (directory capture has inode 12 and cut 13). In
cp15730 and cp15731, there's only one file with inode 14.

Heres's the 3 stat outputs :
philippe@micro11:~$ sudo mount -t nilfs2 -r -o cp=15730 /dev/mapper/vg11a-video mnt/snap5
philippe@micro11:~$ sudo mount -t nilfs2 -r -o cp=15731 /dev/mapper/vg11a-video mnt/snap6
philippe@micro11:~$ sudo mount -t nilfs2 -r -o cp=15732 /dev/mapper/vg11a-video mnt/snap7

philippe@micro11:~$ stat mnt/snap5/cut/f5_20110125_202053.ts\(0\).Xcl 
  File: « mnt/snap5/cut/f5_20110125_202053.ts(0).Xcl »
  Size: 47        	Blocks: 8          IO Block: 4096   fichier
Device: fe00h/65024d	Inode: 14          Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1000/philippe)   Gid: ( 1000/ UNKNOWN)
Access: 2011-01-25 22:33:34.914556435 +0100
Modify: 2011-01-25 22:33:34.914556435 +0100
Change: 2011-01-25 22:33:34.914556435 +0100
 Birth: -

philippe@micro11:~$ stat mnt/snap6/cut/f5_20110125_202053.ts\(0\).Xcl
  File: « mnt/snap6/cut/f5_20110125_202053.ts(0).Xcl »
  Size: 6214528000	Blocks: 18446744073697366064 IO Block: 4096   fichier
Device: fe00h/65024d	Inode: 14          Links: 0
Access: (0644/-rw-r--r--)  Uid: ( 1000/philippe)   Gid: (  100/   users)
Access: 2011-01-24 01:30:02.260271565 +0100
Modify: 2011-01-24 01:30:02.260271565 +0100
Change: 2011-01-25 20:28:48.894851740 +0100
 Birth: -

  File: « mnt/snap7/cut/f5_20110125_202053.ts(0).Xcl »
  Size: 0         	Blocks: 0          IO Block: 4096   fichier vide
Device: fe00h/65024d	Inode: 14          Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1000/philippe)   Gid: (  100/   users)
Access: 2011-01-29 18:19:51.719138031 +0100
Modify: 2011-01-29 18:19:51.719138031 +0100
Change: 2011-01-29 18:19:51.719138031 +0100
 Birth: -

PhC
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