NFS deadlock (unkillable nfsd and no mounts work)
Daniel Braniss
danny at cs.huji.ac.il
Tue Nov 16 10:27:59 UTC 2010
> on 05/11/2010 23:27 Kostik Belousov said the following:
> > I agree that the fix a right fix for real issue. It should only
> > affect the filesystems that do support VFS_VGET(). In other words,
> > it is relevant for e.g. UFS exports, but not for ZFS, that is the
> > Andrey case.
>
> Actually ZFS does implement vfs_vget, but with a special quirk for .zfs/ and
> stuff under it:
>
> static int
> zfs_vget(vfs_t *vfsp, ino_t ino, int flags, vnode_t **vpp)
> {
> zfsvfs_t *zfsvfs = vfsp->vfs_data;
> znode_t *zp;
> int err;
>
> /*
> * zfs_zget() can't operate on virtual entires like .zfs/ or
************************************************ entries
************************
===============================================================================
==
> * .zfs/snapshot/ directories, that's why we return EOPNOTSUPP.
> * This will make NFS to switch to LOOKUP instead of using VGET.
> */
> if (ino == ZFSCTL_INO_ROOT || ino == ZFSCTL_INO_SNAPDIR)
> return (EOPNOTSUPP);
> ...
> ...
>
>
> --
> Andriy Gapon
> _______________________________________________
> freebsd-stable at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-stable
> To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
>
More information about the freebsd-stable
mailing list