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/* Store creation
Copyright (C) 1995, 1996 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. */
#include <hurd/fs.h>
#include "store.h"
/* Return a new store in STORE, which refers to the storage underlying
SOURCE. A reference to SOURCE is created (but may be destroyed with
store_close_source). */
error_t store_create (file_t source, struct store **store)
{
error_t err;
mach_port_t port;
string_t name_buf;
char *misc;
mach_msg_type_number_t misc_len = 0;
off_t *runs;
mach_msg_type_number_t runs_len = 0;
int flags;
size_t block_size;
int class;
err = file_get_storage_info (source, &class, &runs, &runs_len, &block_size,
name_buf, &port, &misc, &misc_len, &flags);
if (err)
return err;
if (misc_len > 0)
vm_deallocate (mach_task_self (), (vm_address_t)misc, misc_len);
switch (class)
{
case STORAGE_DEVICE:
err = _store_device_create (port, block_size, runs, runs_len, store);
break;
case STORAGE_HURD_FILE:
err = _store_file_create (port, block_size, runs, runs_len, store);
break;
default:
err = EINVAL;
}
if (!err && *name_buf)
/* Copy out of our stack buffer NAME_BUF. */
store_set_name (*store, name_buf);
if (runs_len > 0)
/* RUNS is copied into malloced storage above. */
vm_deallocate (mach_task_self (), (vm_address_t)runs, runs_len);
if (err)
mach_port_deallocate (mach_task_self (), port);
else
/* Keep a reference to SOURCE around. */
{
mach_port_mod_refs (mach_task_self (), source, MACH_PORT_RIGHT_SEND, 1);
(*store)->source = source;
}
return err;
}
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