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/* Functions for making send rights in various ways
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Return in PORT a send right for a new protid, pointing at the peropen PO,
with rights initialized from AUTH. */
error_t
treefs_peropen_create_right (struct treefs_peropen *po,
struct treefs_auth *auth,
mach_port_t *port)
{
struct treefs_node *node = po->node;
struct treefs_fsys *fsys = node->fsys;
struct treefs_handle *handle =
ports_allocate_port (fsys->port_bucket,
sizeof (struct treefs_handle),
fsys->handle_port_class);
if (handle == NULL)
return MACH_PORT_NULL;
handle->po = po;
po->refs++;
handle->auth = auth;
auth->refs++;
err = treefs_node_init_handle (node, handle);
if (err)
{
po->refs--;
auth->refs--;
}
*port = ports_get_right (handle);
return 0;
}
/* Return in PORT a send right for a new handle and a new peropen, pointing
at NODE, with rights initialized from AUTH. FLAGS and PARENT_PORT are used
to initialize the corresponding fields in the new peropen. */
error_t
treefs_node_create_right (struct treefs_node *node, int flags,
mach_port_t parent_port, struct treefs_auth *auth,
mach_port_t *port)
{
struct treefs_peropen *po = malloc (sizeof (struct treefs_peropen));
if (po == NULL)
return ENOMEM;
/* Initialize the peropen structure. */
po->refs = 0;
po->node = node;
po->open_flags = flags;
po->user_lock_state = LOCK_UN;
po->parent_port = parent_port;
if (parent_port != MACH_PORT_NULL)
mach_port_mod_refs (mach_task_self (),
parent_port, MACH_PORT_RIGHT_SEND, 1);
treefs_node_ref (node);
err = treefs_node_init_peropen (node, po, flags, auth);
if (err)
goto puke;
err = treefs_peropen_create_right (po, auth, port);
if (err)
goto puke;
return 0;
puke:
treefs_node_unref (node);
free (po);
return err;
}
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