From 2126a6999dbd09fc3e121cfc42e8346df2e88c13 Mon Sep 17 00:00:00 2001 From: Miles Bader Date: Mon, 13 Nov 1995 20:21:29 +0000 Subject: Initial revision --- libstore/device.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 libstore/device.c (limited to 'libstore/device.c') diff --git a/libstore/device.c b/libstore/device.c new file mode 100644 index 00000000..65a714b9 --- /dev/null +++ b/libstore/device.c @@ -0,0 +1,60 @@ +/* Mach device backend + + Copyright (C) 1995 Free Software Foundation, Inc. + + Written by Miles Bader + + 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 "store.h" + +/* Return a new store in STORE referring to the mach device DEVICE. Consumes + the send right DEVICE. */ +error_t +store_device_create (device_t device, struct store **store) +{ + off_t runs[2]; + size_t sizes[DEV_GET_SIZE_COUNT], block_size; + unsigned sizes_len = DEV_GET_SIZE_COUNT; + error_t err = device_get_status (*port, DEV_GET_SIZE, sizes, &sizes_len); + + assert (sizes_len == DEV_GET_SIZE_COUNT); + + block_size = sizes[DEV_GET_SIZE_RECORD_SIZE]; + runs[0] = 0; + runs[1] = sizes[DEV_GET_SIZE_DEVICE_SIZE] / block_size; + + return _store_device_create (device, runs, 2, block_size, store); +} + +/* Like store_device_create, but doesn't query the device for information. */ +error_t +_store_device_create (device_t device, + off_t *runs, unsigned runs_len, size_t block_size, + struct store **store) +{ + *store = _alloc_store (); + + if (!*store) + return ENOMEM; + + (*store)->block_size = block_size; + store_set_runs (*store, runs, runs_len); + store_derive (*store); + + return 0; +} -- cgit v1.2.3