Re: nfs subvolume access?

Ulli Horlacher
2021-03-10T17:47:33Z

On Wed 2021-03-10 (18:29), Forza wrote:

> Did you try the fsid on the export?

Yes:

root@tsmsrvj:/etc# grep tsm exports
/data/fex tsmsrvi(rw,async,no_subtree_check,no_root_squash,fsid=0x0011)

root@tsmsrvj:/etc# exportfs -va
exporting fex.rus.uni-stuttgart.de:/data/fex
exporting tsmsrvi.rus.uni-stuttgart.de:/data/fex

root@tsmsrvi:~# umount /nfs/tsmsrvj/fex

root@tsmsrvi:~# mount -o nfsvers=3,proto=tcp tsmsrvj:/data/fex /nfs/tsmsrvj/fex

root@tsmsrvi:~# find /nfs/tsmsrvj/fex
/nfs/tsmsrvj/fex
find: File system loop detected; '/nfs/tsmsrvj/fex/spool' is part of the same file system loop as '/nfs/tsmsrvj/fex'.

> You may want to enable debug logging on your server.
> https://wiki.tnonline.net/w/Blog/NFS_Server_Logging

root@tsmsrvj:/etc# rpcdebug -m nfsd all
nfsd sock fh export svc proc fileop auth repcache xdr lockd

root@tsmsrvj:/var/log# tailf kern.log
2021-03-10 18:45:17 [106259.649850] nfsd_dispatch: vers 3 proc 1
2021-03-10 18:45:17 [106259.649854] nfsd: GETATTR(3) 8: 00010001 00000011 00000000 00000000 00000000 00000000
2021-03-10 18:45:17 [106259.649856] nfsd: fh_verify(8: 00010001 00000011 00000000 00000000 00000000 00000000)
2021-03-10 18:45:17 [106259.650306] nfsd_dispatch: vers 3 proc 4
2021-03-10 18:45:17 [106259.650310] nfsd: ACCESS(3) 8: 00010001 00000011 00000000 00000000 00000000 00000000 0x1f
2021-03-10 18:45:17 [106259.650313] nfsd: fh_verify(8: 00010001 00000011 00000000 00000000 00000000 00000000)
2021-03-10 18:45:17 [106259.650869] nfsd_dispatch: vers 3 proc 17
2021-03-10 18:45:17 [106259.650874] nfsd: READDIR+(3) 8: 00010001 00000011 00000000 00000000 00000000 00000000 32768 bytes at 0
2021-03-10 18:45:17 [106259.650877] nfsd: fh_verify(8: 00010001 00000011 00000000 00000000 00000000 00000000)
2021-03-10 18:45:17 [106259.650883] nfsd: fh_verify(8: 00010001 00000011 00000000 00000000 00000000 00000000)
2021-03-10 18:45:17 [106259.650903] nfsd: fh_compose(exp 00:31/256 /fex, ino=256)
2021-03-10 18:45:17 [106259.650907] nfsd: fh_compose(exp 00:31/256 /, ino=256)
2021-03-10 18:45:17 [106259.651454] nfsd_dispatch: vers 3 proc 3
2021-03-10 18:45:17 [106259.651459] nfsd: LOOKUP(3) 8: 00010001 00000011 00000000 00000000 00000000 00000000 spool
2021-03-10 18:45:17 [106259.651463] nfsd: fh_verify(8: 00010001 00000011 00000000 00000000 00000000 00000000)
2021-03-10 18:45:17 [106259.651471] nfsd: nfsd_lookup(fh 8: 00010001 00000011 00000000 00000000 00000000 00000000, spool)
2021-03-10 18:45:17 [106259.651477] nfsd: fh_compose(exp 00:31/256 fex/spool, ino=256)

Hmmm... and now?

--
Ullrich Horlacher Server und Virtualisierung
Rechenzentrum TIK
Universitaet Stuttgart E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a Tel: ++49-711-68565868
70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/
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