ia64/xen-unstable

view tools/ioemu/block_int.h @ 7238:971e7c7411b3

Raise an exception if an error appears on the pipes to our children, and make
sure that the child's pipes are closed even under that exception. Move the
handling of POLLHUP to the end of the loop, so that we guarantee to read any
remaining data from the child if POLLHUP and POLLIN appear at the same time.

Signed-off-by: Ewan Mellor <ewan@xensource.com>
author emellor@ewan
date Thu Oct 06 10:13:11 2005 +0100 (2005-10-06)
parents 8e5fc5fe636c
children f7b43e5c42b9
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);
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_is_allocated)(BlockDriverState *bs, int64_t sector_num,
40 int nb_sectors, int *pnum);
41 int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
42 struct BlockDriver *next;
43 };
45 struct BlockDriverState {
46 int64_t total_sectors;
47 int read_only; /* if true, the media is read only */
48 int inserted; /* if true, the media is present */
49 int removable; /* if true, the media can be removed */
50 int locked; /* if true, the media cannot temporarily be ejected */
51 int encrypted; /* if true, the media is encrypted */
52 /* event callback when inserting/removing */
53 void (*change_cb)(void *opaque);
54 void *change_opaque;
56 BlockDriver *drv;
57 void *opaque;
59 int boot_sector_enabled;
60 uint8_t boot_sector_data[512];
62 char filename[1024];
63 char backing_file[1024]; /* if non zero, the image is a diff of
64 this file image */
65 int is_temporary;
67 BlockDriverState *backing_hd;
69 /* NOTE: the following infos are only hints for real hardware
70 drivers. They are not used by the block driver */
71 int cyls, heads, secs;
72 int type;
73 char device_name[32];
74 BlockDriverState *next;
75 };
77 #endif /* BLOCK_INT_H */