FreeBSD/Linux Kernel Cross Reference
sys/geom/geom_disk.h
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: releng/11.1/sys/geom/geom_disk.h 312405 2017-01-19 11:16:25Z mav $
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 #define G_DISK_CLASS_NAME "DISK"
48
49 struct disk;
50
51 typedef int disk_open_t(struct disk *);
52 typedef int disk_close_t(struct disk *);
53 typedef void disk_strategy_t(struct bio *bp);
54 typedef int disk_getattr_t(struct bio *bp);
55 typedef void disk_gone_t(struct disk *);
56 typedef int disk_ioctl_t(struct disk *, u_long cmd, void *data,
57 int fflag, struct thread *td);
58 /* NB: disk_ioctl_t SHALL be cast'able to d_ioctl_t */
59
60 struct g_geom;
61 struct devstat;
62
63 typedef enum {
64 DISK_INIT_NONE,
65 DISK_INIT_START,
66 DISK_INIT_DONE
67 } disk_init_level;
68
69 struct disk {
70 /* Fields which are private to geom_disk */
71 struct g_geom *d_geom;
72 struct devstat *d_devstat;
73 int d_goneflag;
74 int d_destroyed;
75 disk_init_level d_init_level;
76
77 /* Shared fields */
78 u_int d_flags;
79 const char *d_name;
80 u_int d_unit;
81 struct bio_queue_head *d_queue;
82 struct mtx *d_lock;
83
84 /* Disk methods */
85 disk_open_t *d_open;
86 disk_close_t *d_close;
87 disk_strategy_t *d_strategy;
88 disk_ioctl_t *d_ioctl;
89 dumper_t *d_dump;
90 disk_getattr_t *d_getattr;
91 disk_gone_t *d_gone;
92
93 /* Info fields from driver to geom_disk.c. Valid when open */
94 u_int d_sectorsize;
95 off_t d_mediasize;
96 u_int d_fwsectors;
97 u_int d_fwheads;
98 u_int d_maxsize;
99 off_t d_delmaxsize;
100 u_int d_stripeoffset;
101 u_int d_stripesize;
102 char d_ident[DISK_IDENT_SIZE];
103 char d_descr[DISK_IDENT_SIZE];
104 uint16_t d_hba_vendor;
105 uint16_t d_hba_device;
106 uint16_t d_hba_subvendor;
107 uint16_t d_hba_subdevice;
108 uint16_t d_rotation_rate;
109
110 /* Fields private to the driver */
111 void *d_drv1;
112 };
113
114 #define DISKFLAG_RESERVED 0x1 /* Was NEEDSGIANT */
115 #define DISKFLAG_OPEN 0x2
116 #define DISKFLAG_CANDELETE 0x4
117 #define DISKFLAG_CANFLUSHCACHE 0x8
118 #define DISKFLAG_UNMAPPED_BIO 0x10
119 #define DISKFLAG_DIRECT_COMPLETION 0x20
120 #define DISKFLAG_CANZONE 0x80
121
122 #define DISK_RR_UNKNOWN 0
123 #define DISK_RR_NON_ROTATING 1
124 #define DISK_RR_MIN 0x0401
125 #define DISK_RR_MAX 0xfffe
126
127 struct disk *disk_alloc(void);
128 void disk_create(struct disk *disk, int version);
129 void disk_destroy(struct disk *disk);
130 void disk_gone(struct disk *disk);
131 void disk_attr_changed(struct disk *dp, const char *attr, int flag);
132 void disk_media_changed(struct disk *dp, int flag);
133 void disk_media_gone(struct disk *dp, int flag);
134 int disk_resize(struct disk *dp, int flag);
135
136 #define DISK_VERSION_00 0x58561059
137 #define DISK_VERSION_01 0x5856105a
138 #define DISK_VERSION_02 0x5856105b
139 #define DISK_VERSION_03 0x5856105c
140 #define DISK_VERSION_04 0x5856105d
141 #define DISK_VERSION_05 0x5856105e
142 #define DISK_VERSION DISK_VERSION_05
143
144 #endif /* _KERNEL */
145 #endif /* _GEOM_GEOM_DISK_H_ */
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