geom_slice.h revision 94287
1176829Srink/*- 2176829Srink * Copyright (c) 2002 Poul-Henning Kamp 3176829Srink * Copyright (c) 2002 Networks Associates Technology, Inc. 4176829Srink * All rights reserved. 5176829Srink * 6176829Srink * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7176829Srink * and NAI Labs, the Security Research Division of Network Associates, Inc. 8176829Srink * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 9176829Srink * DARPA CHATS research program. 10176829Srink * 11176829Srink * Redistribution and use in source and binary forms, with or without 12176829Srink * modification, are permitted provided that the following conditions 13176829Srink * are met: 14176829Srink * 1. Redistributions of source code must retain the above copyright 15176829Srink * notice, this list of conditions and the following disclaimer. 16176829Srink * 2. Redistributions in binary form must reproduce the above copyright 17176829Srink * notice, this list of conditions and the following disclaimer in the 18176829Srink * documentation and/or other materials provided with the distribution. 19239037Sgavin * 3. The names of the authors may not be used to endorse or promote 20176829Srink * products derived from this software without specific prior written 21176829Srink * permission. 22176829Srink * 23176829Srink * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24239037Sgavin * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25176829Srink * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26176829Srink * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27176829Srink * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28176829Srink * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29176829Srink * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30227750Smiwi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31227750Smiwi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32176829Srink * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33176829Srink * SUCH DAMAGE. 34176829Srink * 35176829Srink * $FreeBSD: head/sys/geom/geom_slice.h 94287 2002-04-09 15:43:32Z phk $ 36176829Srink */ 37176829Srink 38176829Srinkstruct g_slice { 39176829Srink off_t offset; 40176829Srink off_t length; 41176829Srink struct g_provider *provider; 42176829Srink}; 43176829Srink 44239037Sgavintypedef int g_slice_start_t (struct bio *bp); 45238803Sgavin 46176834Sbruefferstruct g_slicer { 47176829Srink int nslice; 48176829Srink off_t cfrontstuff; 49176829Srink off_t frontstuff; 50176834Sbrueffer struct g_slice *slices; 51176834Sbrueffer void *softc; 52176834Sbrueffer g_slice_start_t *start; 53238803Sgavin}; 54238803Sgavin 55238803Sgavinstruct g_slicer * g_slice_init(unsigned nslice, unsigned scsize); 56238803Sgaving_dumpconf_t g_slice_dumpconf; 57238803Sgavinstruct g_provider * g_slice_addslice(struct g_geom *gp, int index, off_t offset, off_t length, char *fmt, ...); 58238803Sgavinstruct g_geom * g_slice_new(struct g_class *mp, int slices, struct g_provider *pp, struct g_consumer **cpp, void *extrap, int extra, g_slice_start_t *start); 59238803Sgavin 60238803Sgavin