1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006-2007 Ivan Voras <ivoras@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef _G_VIRSTOR_H_ 32 #define _G_VIRSTOR_H_ 33 34 #define G_VIRSTOR_CLASS_NAME "VIRSTOR" 35 36 #define VIRSTOR_MAP_ALLOCATED 1 37 struct virstor_map_entry { 38 uint16_t flags; 39 uint16_t provider_no; 40 uint32_t provider_chunk; 41 }; 42 43 #define VIRSTOR_MAP_ENTRY_SIZE (sizeof(struct virstor_map_entry)) 44 #define VIRSTOR_MAP_BLOCK_ENTRIES (maxphys / VIRSTOR_MAP_ENTRY_SIZE) 45 /* Struct size is guarded by MPASS in main source */ 46 47 #ifdef _KERNEL 48 49 #define LOG_MSG(lvl, ...) \ 50 _GEOM_DEBUG("GEOM_VIRSTOR", g_virstor_debug, (lvl), NULL, __VA_ARGS__) 51 #define LOG_MESSAGE LOG_MSG 52 53 #define LOG_REQ(lvl, bp, ...) \ 54 _GEOM_DEBUG("GEOM_VIRSTOR", g_virstor_debug, (lvl), (bp), __VA_ARGS__) 55 #define LOG_REQUEST LOG_REQ 56 57 /* "critical" system announcements (e.g. "geom is up") */ 58 #define LVL_ANNOUNCE 0 59 /* errors */ 60 #define LVL_ERROR 1 61 /* warnings */ 62 #define LVL_WARNING 2 63 /* info, noncritical for system operation (user doesn't have to see it */ 64 #define LVL_INFO 5 65 /* debug info */ 66 #define LVL_DEBUG 10 67 /* more debug info */ 68 #define LVL_DEBUG2 12 69 /* superfluous debug info (large volumes of data) */ 70 #define LVL_MOREDEBUG 15 71 72 /* Component data */ 73 struct g_virstor_component { 74 struct g_consumer *gcons; 75 struct g_virstor_softc *sc; 76 unsigned int index; /* Component index in array */ 77 unsigned int chunk_count; 78 unsigned int chunk_next; 79 unsigned int chunk_reserved; 80 unsigned int flags; 81 }; 82 83 /* Internal geom instance data */ 84 struct g_virstor_softc { 85 struct g_geom *geom; 86 struct g_provider *provider; 87 struct g_virstor_component *components; 88 u_int n_components; 89 u_int curr_component; /* Component currently used */ 90 uint32_t id; /* Unique ID of this geom */ 91 off_t virsize; /* Total size of virstor */ 92 off_t sectorsize; 93 size_t chunk_size; 94 size_t chunk_count; /* governs map_size */ 95 struct virstor_map_entry *map; 96 size_t map_size; /* (in bytes) */ 97 size_t map_sectors; /* Size of map in sectors */ 98 size_t me_per_sector; /* # map entries in a sector */ 99 STAILQ_HEAD(, g_virstor_bio_q) delayed_bio_q; /* Queue of delayed BIOs */ 100 struct mtx delayed_bio_q_mtx; 101 }; 102 103 /* "delayed BIOs" Queue element */ 104 struct g_virstor_bio_q { 105 struct bio *bio; 106 STAILQ_ENTRY(g_virstor_bio_q) linkage; 107 }; 108 109 #endif /* _KERNEL */ 110 111 #endif /* !_G_VIRSTOR_H_ */ 112