Path issue Filesystem mounted with NFS(v4?)

[Chris Johns]

On 11/7/2023 7:32 pm, Heinz Junkes wrote:
> Hallo,
> 
> I am observing a strange problem with an NFS(v4) mounted filesystem and path usage.
> 
> I have mounted a filesystem via NFSv4 (/Volumes):
> 
> loc = 0x00820a20
>     node_access = 0x007c2378, node_access_2 = 0x00000000, handler = 0x005c3474
> type = nfs, mounted, read-write, target = /Volumes, dev = 141.14.131.192, root loc = 0x00913468
> 
> In the shell I can change there into a directory:
> 
> SHLL [/] # cd /Volumes/Epics/LogDir/Database
> SHLL [/Volumes/Epics/LogDir/Database] # pwd
> /Volumes/Epics/LogDir/Database
> 
> SHLL [/Volumes/Epics/LogDir/Database] # ls -l
> total 20
> -rw-r--r--  1 1001  1001  10694 Mar 23  2021 iocvmeIOC3.dbhcr
> -rw-r--r--  1 1001  1001      0 Mar 23  2021 iocvmeIOC3.dbior
> -rw-r--r--  1 1001  1001   5451 Mar 23  2021 iocvmeIOC3.dbl
> 
> I can now copy a file to here:
> 
> SHLL [/Volumes/Epics/LogDir/Database] # cp /etc/passwd .
> SHLL [/Volumes/Epics/LogDir/Database] # ls -l
> total 24
> -rw-r--r--  1 1001   1001   10694 Mar 23  2021 iocvmeIOC3.dbhcr
> -rw-r--r--  1 1001   1001       0 Mar 23  2021 iocvmeIOC3.dbior
> -rw-r--r--  1 1001   1001    5451 Mar 23  2021 iocvmeIOC3.dbl
> -rwxrwxrwt  1 65534  65534     14 Jul 11 11:28 passwd
> SHLL [/Volumes/Epics/LogDir/Database] # cat passwd
> root::0:0::::
> SHLL [/Volumes/Epics/LogDir/Database] # rm passwd
> SHLL [/Volumes/Epics/LogDir/Database] # ls -l
> total 20
> -rw-r--r--  1 1001  1001  10694 Mar 23  2021 iocvmeIOC3.dbhcr
> -rw-r--r--  1 1001  1001      0 Mar 23  2021 iocvmeIOC3.dbior
> -rw-r--r--  1 1001  1001   5451 Mar 23  2021 iocvmeIOC3.dbl
> 
> If I now specify the path instead of “.”, the file appears one dir up ????
> 
> SHLL [/Volumes/Epics/LogDir/Database] # cp /etc/passwd /Volumes/Epics/LogDir/Database/passwd
> SHLL [/Volumes/Epics/LogDir/Database] # ls -l
> total 20
> -rw-r--r--  1 1001  1001  10694 Mar 23  2021 iocvmeIOC3.dbhcr
> -rw-r--r--  1 1001  1001      0 Mar 23  2021 iocvmeIOC3.dbior
> -rw-r--r--  1 1001  1001   5451 Mar 23  2021 iocvmeIOC3.dbl
> SHLL [/Volumes/Epics/LogDir/Database] # ls -l ..
> total 40
> drwxrwxrwx  2 65534  65534  4096 Jul 11 11:29 Database
> -rwxrwxrwt  1 65534  65534  9980 Jul 10 11:52 iocvmeIOC1.dbhcr
> -rwsrwsrwt  1 65534  65534     0 Jul 10 11:52 iocvmeIOC1.dbior
> -rwxrwxrwt  1 65534  65534  4713 Jul 10 11:59 iocvmeIOC1.dbl
> drwxrwxrwx  3 65534  65534  4096 Mar 23  2021 log
> -rwxrwxrwt  1 65534  65534    14 Jul 11 11:30 passwd
> SHLL [/Volumes/Epics/LogDir/Database] # cat ../passwd
> root::0:0::::
> 
> 
> Any Idea what might go wrong? Any fix?

Is it related to https://devel.rtems.org/ticket/4723?

I was planning to look into this in the next couple of weeks.

Chris