Re: Bug : reuse same inode

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

Le Mon, 07 Feb 2011 13:02:14 +0900 (JST),
Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org> a écrit :

> Can you track the past state of this file from earlier checkpoints ?
Just before recording :
philippe@micro11:~$ sudo mount -t nilfs2 -r -o cp=16940 /dev/mapper/vg11a-video mnt/snap5
philippe@micro11:~$ ls -li mnt/snap5/**
18 -rw-r--r-- 1 philippe users 4434  9 janv. 15:45 mnt/snap5/channels.conf

mnt/snap5/capture:
total 19452056
16 -rw-r--r-- 1 philippe users 8606489600  9 janv. 15:42 f3_20110107_205154.ts
15 -rw-r--r-- 1 philippe users 4688870400 19 janv. 23:14 f4_20110119_204007.ts
17 -rw-r--r-- 1 philippe users 6545408000  9 janv. 15:45 tf1hd_20101219_203305_schrek2.ts

mnt/snap5/cut:
total 4
19 -rw-r--r-- 1 philippe  1000        156 29 janv. 21:16 canal_20110129_181951.ts(0).Xcl
14 -rw-r--r-- 0 philippe users 4838067200 30 janv. 00:58 f5_20110125_202053.ts(0).Xcl

Start of recording :
philippe@micro11:~$ sudo mount -t nilfs2 -r -o cp=16941 /dev/mapper/vg11a-video mnt/snap6
philippe@micro11:~$ ls -li mnt/snap6/**                                                  
18 -rw-r--r-- 1 philippe users 4434  9 janv. 15:45 mnt/snap6/channels.conf

mnt/snap6/capture:
total 19454420
14 -rw-r--r-- 1 philippe users    2406400 30 janv. 17:45 f2_20110130_174456.ts
16 -rw-r--r-- 1 philippe users 8606489600  9 janv. 15:42 f3_20110107_205154.ts
15 -rw-r--r-- 1 philippe users 4688870400 19 janv. 23:14 f4_20110119_204007.ts
17 -rw-r--r-- 1 philippe users 6545408000  9 janv. 15:45 tf1hd_20101219_203305_schrek2.ts

mnt/snap6/cut:
total 2368
19 -rw-r--r-- 1 philippe  1000     156 29 janv. 21:16 canal_20110129_181951.ts(0).Xcl
14 -rw-r--r-- 1 philippe users 2406400 30 janv. 17:45 f5_20110125_202053.ts(0).Xcl

That's the problem : inode 14 is reused because there was a file with 0 link (f5_20110125_202053.ts(0).Xcl) 
in another directory. So I tracked earlier and found that :

cp15730
-------
philippe@micro11:~$ ls -li mnt/snap5/**
18 -rw-r--r-- 1 philippe users 4434  9 janv. 15:45 mnt/snap5/channels.conf

mnt/snap5/capture:
total 19452056
16 -rw-r--r-- 1 philippe users 8606489600  9 janv. 15:42 f3_20110107_205154.ts
15 -rw-r--r-- 1 philippe users 4688870400 19 janv. 23:14 f4_20110119_204007.ts
17 -rw-r--r-- 1 philippe users 6545408000  9 janv. 15:45 tf1hd_20101219_203305_schrek2.ts

mnt/snap5/cut:
total 4
14 -rw-r--r-- 1 philippe 1000 47 25 janv. 22:33 f5_20110125_202053.ts(0).Xcl

All is OK

cp15731
-------
philippe@micro11:~$ ls -li mnt/snap7/**
18 -rw-r--r-- 1 philippe users 4434  9 janv. 15:45 mnt/snap7/channels.conf

mnt/snap7/capture:
total 19452056
16 -rw-r--r-- 1 philippe users 8606489600  9 janv. 15:42 f3_20110107_205154.ts
15 -rw-r--r-- 1 philippe users 4688870400 19 janv. 23:14 f4_20110119_204007.ts
17 -rw-r--r-- 1 philippe users 6545408000  9 janv. 15:45 tf1hd_20101219_203305_schrek2.ts

mnt/snap7/cut:
total 9223372036848683032
14 -rw-r--r-- 0 philippe users 6214528000 24 janv. 01:30 f5_20110125_202053.ts(0).Xcl

Size of file f5_20110125_202053.ts(0).Xcl is incorrect and it appears with 0 link.


cp15732
-------
philippe@micro11:~$ ls -li mnt/snap2/**
18 -rw-r--r-- 1 philippe users 4434  9 janv. 15:45 mnt/snap2/channels.conf

mnt/snap2/capture:
total 19452056
14 -rw-r--r-- 1 philippe users          0 29 janv. 18:19 canal_20110129_181951.ts
16 -rw-r--r-- 1 philippe users 8606489600  9 janv. 15:42 f3_20110107_205154.ts
15 -rw-r--r-- 1 philippe users 4688870400 19 janv. 23:14 f4_20110119_204007.ts
17 -rw-r--r-- 1 philippe users 6545408000  9 janv. 15:45 tf1hd_20101219_203305_schrek2.ts

mnt/snap2/cut:
total 0
14 -rw-r--r-- 1 philippe users 0 29 janv. 18:19 f5_20110125_202053.ts(0).Xcl


Inode 14 is used by 2 files. When I deleted the file canal_20110129_181951.ts, we have
the situation of the cp 16940 (the first of this mail) and a file with 0 link.

Problem is in cp15731, just before the creation of file canal_20110129_181951.ts.

PhC
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