Re: reiserfs tails and disk space

[Laurent Riffard <laurent.riffard@free.fr>]

Le 19.01.2006 23:00, Vitaly Fertman a écrit :
> On Thursday 19 January 2006 22:53, Bruce Guenter wrote:
> 
>>On Wed, Jan 18, 2006 at 09:34:49PM +0300, Vitaly Fertman wrote:
>>
>>>thank you for the report, the attached patch should fix 
>>>the broken mount options. please try it.
>>
>>It does indeed fix the problem.  What other mount options would have
>>been affected by this problem?  
> 
> 
> it does not seem to brake anything else.
> 
> 
>>In what version of the kernel was this 
>>problem introduced?
> 
> 
> 2.6.13.
> 

This patch have been pushed into 2.6.16-rc1-mm2, and now I have some
permissions problems : I'm not able to update some files or
directories althought the permissions seems OK. Not all files are
impacted.

Reverting
someone-broke-reiserfs-v3-mount-options-this-fixes-it.patch fixes my
permissions problems.

I have to say this filesystem have been badly hit by the
2.6.16-rc1-mm1 reiserfs' bugs. I had to issue a "fsck.reiserfs
--rebuild-tree" to get back about 1 Gb of files in lost+found
(reiserfsck 3.6.19).

Here are some logs taken with an unpatched 2.6.16-rc1-mm2 kernel :

Script started on Sat Jan 21 17:54:22 2006
[ this is root user ]
sh-3.00# cd /home/gnutella/
sh-3.00# df -h .
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vglinux1-lvhome
                      5.0G  4.8G  291M  95% /home
sh-3.00# mount
[...]
/dev/mapper/vglinux1-lvhome on /home type reiserfs (rw)
[...]
sh-3.00# ls -ld .
drwx--x--x  18 gnutella gnutella 768 Jan 21 16:35 .
sh-3.00# ls -l
total 16
drwxr-xr-x  3 gnutella gnutella  72 Dec 24  2002 News
lrwxrwxrwx  1 gnutella gnutella  21 Jan 20 00:19 azureus ->
/home/laurent/azureus
-rw-r--r--  1 root     root     121 Jan 21 16:35 essai
-rw-r--r--  1 root     root     121 Jan 21 15:44 essai2
-rw-r--r--  1 root     root     121 Jan 21 16:24 essai3
-rw-r--r--  1 root     root       0 Jan 21 16:35 essai4
drwxr-xr-x  5 gnutella gnutella 120 Jan 20 00:11 klibido
-rw-------  1 gnutella gnutella 377 Jan 20 00:22 nohup.out
drwx------  7 gnutella gnutella 320 Jan 21 04:08 tmp
sh-3.00# touch essai5
touch: cannot touch `essai5': Permission denied
sh-3.00# > eesai5
sh: eesai5: Permission denied
sh-3.00# rm essai
rm: remove write-protected regular file `essai'? y
rm: cannot remove `essai': Permission denied
sh-3.00# strace touch essai
execve("/bin/touch", ["touch", "essai"], [/* 13 vars */]) = 0
uname({sys="Linux", node="antares.localdomain", ...}) = 0
brk(0)                                  = 0x8051000
[...]
open("essai", O_WRONLY|O_NONBLOCK|O_CREAT|O_NOCTTY|O_LARGEFILE,
0666) = -1 EACCES (Permission denied)
utime("essai", NULL)                    = -1 EACCES (Permission denied)
write(2, "touch: ", 7touch: )                  = 7
write(2, "cannot touch `essai\'", 20cannot touch `essai')   = 20
write(2, ": Permission denied", 19: Permission denied)     = 19
write(2, "\n", 1
)                       = 1
exit_group(1)                           = ?
Process 1699 detached
sh-3.00# ls -l
total 16
drwxr-xr-x  3 gnutella gnutella  72 Dec 24  2002 News
lrwxrwxrwx  1 gnutella gnutella  21 Jan 20 00:19 azureus ->
/home/laurent/azureus
-rw-r--r--  1 root     root     121 Jan 21 16:35 essai
-rw-r--r--  1 root     root     121 Jan 21 15:44 essai2
-rw-r--r--  1 root     root     121 Jan 21 16:24 essai3
-rw-r--r--  1 root     root       0 Jan 21 16:35 essai4
drwxr-xr-x  5 gnutella gnutella 120 Jan 20 00:11 klibido
-rw-------  1 gnutella gnutella 377 Jan 20 00:22 nohup.out
drwx------  7 gnutella gnutella 320 Jan 21 04:08 tmp
sh-3.00# strace vi essai 2>/tmp/trace
[...]
sh-3.00# grep essai /tmp/essai
execve("/bin/vi", ["vi", "essai"], [/* 13 vars */]) = 0
stat64("essai", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
stat64("/home/gnutella/essai", {st_mode=S_IFREG|0644, st_size=121,
...}) = 0
stat64("essai", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
stat64("essai", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
access("essai", W_OK)                   = -1 EACCES (Permission denied)
open("essai", O_RDONLY|O_LARGEFILE)     = 3
open("essai", O_RDONLY|O_LARGEFILE)     = 3
stat64("essai", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
sh-3.00#
Script done on Sat Jan 21 18:24:23 2006

~~
laurent