debuggers.hg

view tools/ioemu/block_int.h @ 0:7d21f7218375

Exact replica of unstable on 051908 + README-this
author Mukesh Rathor
date Mon May 19 15:34:57 2008 -0700 (2008-05-19)
parents
children
line source
1 /*
2 * QEMU System Emulator block driver
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #ifndef BLOCK_INT_H
25 #define BLOCK_INT_H
27 struct BlockDriver {
28 const char *format_name;
29 int instance_size;
30 int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
31 int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags);
32 int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
33 uint8_t *buf, int nb_sectors);
34 int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,
35 const uint8_t *buf, int nb_sectors);
36 void (*bdrv_close)(BlockDriverState *bs);
37 int (*bdrv_create)(const char *filename, int64_t total_sectors,
38 const char *backing_file, int flags);
39 int (*bdrv_flush)(BlockDriverState *bs);
40 int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num,
41 int nb_sectors, int *pnum);
42 int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
43 int (*bdrv_make_empty)(BlockDriverState *bs);
44 /* aio */
45 BlockDriverAIOCB *(*bdrv_aio_read)(BlockDriverState *bs,
46 int64_t sector_num, uint8_t *buf, int nb_sectors,
47 BlockDriverCompletionFunc *cb, void *opaque);
48 BlockDriverAIOCB *(*bdrv_aio_write)(BlockDriverState *bs,
49 int64_t sector_num, const uint8_t *buf, int nb_sectors,
50 BlockDriverCompletionFunc *cb, void *opaque);
51 void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb);
52 BlockDriverAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
53 BlockDriverCompletionFunc *cb, void *opaque);
54 int aiocb_size;
56 const char *protocol_name;
57 int (*bdrv_pread)(BlockDriverState *bs, int64_t offset,
58 uint8_t *buf, int count);
59 int (*bdrv_pwrite)(BlockDriverState *bs, int64_t offset,
60 const uint8_t *buf, int count);
61 int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset);
62 int64_t (*bdrv_getlength)(BlockDriverState *bs);
63 int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num,
64 const uint8_t *buf, int nb_sectors);
66 int (*bdrv_snapshot_create)(BlockDriverState *bs,
67 QEMUSnapshotInfo *sn_info);
68 int (*bdrv_snapshot_goto)(BlockDriverState *bs,
69 const char *snapshot_id);
70 int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id);
71 int (*bdrv_snapshot_list)(BlockDriverState *bs,
72 QEMUSnapshotInfo **psn_info);
73 int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
75 /* removable device specific */
76 int (*bdrv_is_inserted)(BlockDriverState *bs);
77 int (*bdrv_media_changed)(BlockDriverState *bs);
78 int (*bdrv_eject)(BlockDriverState *bs, int eject_flag);
79 int (*bdrv_set_locked)(BlockDriverState *bs, int locked);
81 BlockDriverAIOCB *free_aiocb;
82 struct BlockDriver *next;
83 };
85 struct BlockDriverState {
86 int64_t total_sectors; /* if we are reading a disk image, give its
87 size in sectors */
88 int read_only; /* if true, the media is read only */
89 int removable; /* if true, the media can be removed */
90 int locked; /* if true, the media cannot temporarily be ejected */
91 int encrypted; /* if true, the media is encrypted */
92 int extendable;/* if true, we may write out of original range */
93 /* event callback when inserting/removing */
94 void (*change_cb)(void *opaque);
95 void *change_opaque;
97 BlockDriver *drv; /* NULL means no media */
98 void *opaque;
100 int boot_sector_enabled;
101 uint8_t boot_sector_data[512];
103 char filename[1024];
104 char backing_file[1024]; /* if non zero, the image is a diff of
105 this file image */
106 int is_temporary;
107 int media_changed;
109 BlockDriverState *backing_hd;
110 /* async read/write emulation */
112 void *sync_aiocb;
114 /* NOTE: the following infos are only hints for real hardware
115 drivers. They are not used by the block driver */
116 int cyls, heads, secs, translation;
117 int type;
118 char device_name[32];
119 BlockDriverState *next;
120 };
122 struct BlockDriverAIOCB {
123 BlockDriverState *bs;
124 BlockDriverCompletionFunc *cb;
125 void *opaque;
126 BlockDriverAIOCB *next;
127 };
129 void get_tmp_filename(char *filename, int size);
131 void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
132 void *opaque);
133 void qemu_aio_release(void *p);
135 #endif /* BLOCK_INT_H */