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/* libdiskfs implementation of io_identity RPC
Copyright (C) 1996,97,98,2001,02 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "priv.h"
#include "io_S.h"
/* Implement io_identity as described in <hurd/io.defs>. */
error_t
diskfs_S_io_identity (struct protid *cred,
mach_port_t *id,
mach_msg_type_name_t *idtype,
mach_port_t *fsys,
mach_msg_type_name_t *fsystype,
ino_t *fileno)
{
struct node *np;
error_t err;
ino_t inum;
if (!cred)
return EOPNOTSUPP;
np = cred->po->np;
mutex_lock (&np->lock);
inum = np->dn_stat.st_ino;
mutex_unlock (&np->lock);
err = fshelp_get_identity (diskfs_port_bucket, inum, id);
if (! err)
{
if (cred->po->shadow_root && cred->po->shadow_root != diskfs_root_node)
{
err = fshelp_get_identity (diskfs_port_bucket,
cred->po->shadow_root->dn_stat.st_ino,
fsys);
if (err)
mach_port_deallocate (mach_task_self (), *id);
}
else
*fsys = diskfs_fsys_identity;
}
if (! err)
{
*idtype = MACH_MSG_TYPE_MAKE_SEND;
*fsystype = MACH_MSG_TYPE_MAKE_SEND;
*fileno = inum;
}
return err;
}
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