K 10
svn:author
V 7
delphij
K 8
svn:date
V 27
2015-01-10T01:01:12.920348Z
K 7
svn:log
V 546
MFC r264392 (davide):

Fix a panic in zfs_rename().
this is due to a wrong dereference of a vnode when it's not locked and
can be (potentially) recycled. 'sdvp' cannot be locked on zfs_rename()
entry point because the VFS can't be sure that this scenario is
LOR-free (it might violate the parent->child lock acquisition rule).
Dereference 'tdvp' instead, which is already locked on entry, and access
'sdvp' fields only when it's safe, i.e. under ZFS_ENTER scope.

While at it, remove the usage of VOP_REALVP, as long as this is a NOP
on FreeBSD.

END