1 /*- 2 * Copyright (c) 2003 Poul-Henning Kamp 3 * All rights reserved. 4 * 5 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 6 * and NAI Labs, the Security Research Division of Network Associates, Inc. 7 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 8 * DARPA CHATS research program. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The names of the authors may not be used to endorse or promote 19 * products derived from this software without specific prior written 20 * permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 */ 36 37 #ifndef _GEOM_GEOM_DISK_H_ 38 #define _GEOM_GEOM_DISK_H_ 39 40 #ifdef _KERNEL 41 42 #include <sys/queue.h> 43 #include <sys/_lock.h> 44 #include <sys/_mutex.h> 45 #include <sys/disk.h> 46 47 struct disk; 48 49 typedef int disk_open_t(struct disk *); 50 typedef int disk_close_t(struct disk *); 51 typedef void disk_strategy_t(struct bio *bp); 52 typedef int disk_ioctl_t(struct disk *, u_long cmd, void *data, 53 int fflag, struct thread *td); 54 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */ 55 56 struct g_geom; 57 struct devstat; 58 59 struct disk { 60 /* Fields which are private to geom_disk */ 61 struct g_geom *d_geom; 62 struct devstat *d_devstat; 63 int d_destroyed; 64 65 /* Shared fields */ 66 u_int d_flags; 67 const char *d_name; 68 u_int d_unit; 69 struct bio_queue_head *d_queue; 70 struct mtx *d_lock; 71 72 /* Disk methods */ 73 disk_open_t *d_open; 74 disk_close_t *d_close; 75 disk_strategy_t *d_strategy; 76 disk_ioctl_t *d_ioctl; 77 dumper_t *d_dump; 78 79 /* Info fields from driver to geom_disk.c. Valid when open */ 80 u_int d_sectorsize; 81 off_t d_mediasize; 82 u_int d_fwsectors; 83 u_int d_fwheads; 84 u_int d_maxsize; 85 u_int d_stripeoffset; 86 u_int d_stripesize; 87 char d_ident[DISK_IDENT_SIZE]; 88 89 /* Fields private to the driver */ 90 void *d_drv1; 91 }; 92 93 #define DISKFLAG_NEEDSGIANT 0x1 94 #define DISKFLAG_OPEN 0x2 95 #define DISKFLAG_CANDELETE 0x4 96 #define DISKFLAG_CANFLUSHCACHE 0x8 97 98 struct disk *disk_alloc(void); 99 void disk_create(struct disk *disk, int version); 100 void disk_destroy(struct disk *disk); 101 void disk_gone(struct disk *disk); 102 103 #define DISK_VERSION_00 0x58561059 104 #define DISK_VERSION_01 0x5856105a 105 #define DISK_VERSION DISK_VERSION_01 106 107 #endif /* _KERNEL */ 108 #endif /* _GEOM_GEOM_DISK_H_ */ 109