virtio-pci: Convert fprintf() to error_report()
[qemu/mdroth.git] / block_int.h
blob3c3adb5c85113d38dd5ad4d1b254d43c023677b0
1 /*
2 * QEMU System Emulator block driver
4 * Copyright (c) 2003 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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.
24 #ifndef BLOCK_INT_H
25 #define BLOCK_INT_H
27 #include "block.h"
28 #include "qemu-option.h"
29 #include "qemu-queue.h"
31 #define BLOCK_FLAG_ENCRYPT 1
32 #define BLOCK_FLAG_COMPRESS 2
33 #define BLOCK_FLAG_COMPAT6 4
35 #define BLOCK_OPT_SIZE "size"
36 #define BLOCK_OPT_ENCRYPT "encryption"
37 #define BLOCK_OPT_COMPAT6 "compat6"
38 #define BLOCK_OPT_BACKING_FILE "backing_file"
39 #define BLOCK_OPT_BACKING_FMT "backing_fmt"
40 #define BLOCK_OPT_CLUSTER_SIZE "cluster_size"
41 #define BLOCK_OPT_PREALLOC "preallocation"
43 typedef struct AIOPool {
44 void (*cancel)(BlockDriverAIOCB *acb);
45 int aiocb_size;
46 BlockDriverAIOCB *free_aiocb;
47 } AIOPool;
49 struct BlockDriver {
50 const char *format_name;
51 int instance_size;
52 int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
53 int (*bdrv_probe_device)(const char *filename);
54 int (*bdrv_open)(BlockDriverState *bs, int flags);
55 int (*bdrv_file_open)(BlockDriverState *bs, const char *filename, int flags);
56 int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
57 uint8_t *buf, int nb_sectors);
58 int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,
59 const uint8_t *buf, int nb_sectors);
60 void (*bdrv_close)(BlockDriverState *bs);
61 int (*bdrv_create)(const char *filename, QEMUOptionParameter *options);
62 int (*bdrv_flush)(BlockDriverState *bs);
63 int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num,
64 int nb_sectors, int *pnum);
65 int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
66 int (*bdrv_make_empty)(BlockDriverState *bs);
67 /* aio */
68 BlockDriverAIOCB *(*bdrv_aio_readv)(BlockDriverState *bs,
69 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
70 BlockDriverCompletionFunc *cb, void *opaque);
71 BlockDriverAIOCB *(*bdrv_aio_writev)(BlockDriverState *bs,
72 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
73 BlockDriverCompletionFunc *cb, void *opaque);
74 BlockDriverAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
75 BlockDriverCompletionFunc *cb, void *opaque);
77 int (*bdrv_aio_multiwrite)(BlockDriverState *bs, BlockRequest *reqs,
78 int num_reqs);
79 int (*bdrv_merge_requests)(BlockDriverState *bs, BlockRequest* a,
80 BlockRequest *b);
83 const char *protocol_name;
84 int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset);
85 int64_t (*bdrv_getlength)(BlockDriverState *bs);
86 int (*bdrv_write_compressed)(BlockDriverState *bs, int64_t sector_num,
87 const uint8_t *buf, int nb_sectors);
89 int (*bdrv_snapshot_create)(BlockDriverState *bs,
90 QEMUSnapshotInfo *sn_info);
91 int (*bdrv_snapshot_goto)(BlockDriverState *bs,
92 const char *snapshot_id);
93 int (*bdrv_snapshot_delete)(BlockDriverState *bs, const char *snapshot_id);
94 int (*bdrv_snapshot_list)(BlockDriverState *bs,
95 QEMUSnapshotInfo **psn_info);
96 int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,
97 const char *snapshot_name);
98 int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi);
100 int (*bdrv_save_vmstate)(BlockDriverState *bs, const uint8_t *buf,
101 int64_t pos, int size);
102 int (*bdrv_load_vmstate)(BlockDriverState *bs, uint8_t *buf,
103 int64_t pos, int size);
105 int (*bdrv_change_backing_file)(BlockDriverState *bs,
106 const char *backing_file, const char *backing_fmt);
108 /* removable device specific */
109 int (*bdrv_is_inserted)(BlockDriverState *bs);
110 int (*bdrv_media_changed)(BlockDriverState *bs);
111 int (*bdrv_eject)(BlockDriverState *bs, int eject_flag);
112 int (*bdrv_set_locked)(BlockDriverState *bs, int locked);
114 /* to control generic scsi devices */
115 int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf);
116 BlockDriverAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs,
117 unsigned long int req, void *buf,
118 BlockDriverCompletionFunc *cb, void *opaque);
120 /* List of options for creating images, terminated by name == NULL */
121 QEMUOptionParameter *create_options;
125 * Returns 0 for completed check, -errno for internal errors.
126 * The check results are stored in result.
128 int (*bdrv_check)(BlockDriverState* bs, BdrvCheckResult *result);
130 void (*bdrv_debug_event)(BlockDriverState *bs, BlkDebugEvent event);
133 * Returns 1 if newly created images are guaranteed to contain only
134 * zeros, 0 otherwise.
136 int (*bdrv_has_zero_init)(BlockDriverState *bs);
138 QLIST_ENTRY(BlockDriver) list;
141 struct BlockDriverState {
142 int64_t total_sectors; /* if we are reading a disk image, give its
143 size in sectors */
144 int read_only; /* if true, the media is read only */
145 int keep_read_only; /* if true, the media was requested to stay read only */
146 int open_flags; /* flags used to open the file, re-used for re-open */
147 int removable; /* if true, the media can be removed */
148 int locked; /* if true, the media cannot temporarily be ejected */
149 int tray_open; /* if true, the virtual tray is open */
150 int encrypted; /* if true, the media is encrypted */
151 int valid_key; /* if true, a valid encryption key has been set */
152 int sg; /* if true, the device is a /dev/sg* */
153 /* event callback when inserting/removing */
154 void (*change_cb)(void *opaque);
155 void *change_opaque;
157 BlockDriver *drv; /* NULL means no media */
158 void *opaque;
160 DeviceState *peer;
162 char filename[1024];
163 char backing_file[1024]; /* if non zero, the image is a diff of
164 this file image */
165 char backing_format[16]; /* if non-zero and backing_file exists */
166 int is_temporary;
167 int media_changed;
169 BlockDriverState *backing_hd;
170 BlockDriverState *file;
172 /* async read/write emulation */
174 void *sync_aiocb;
176 /* I/O stats (display with "info blockstats"). */
177 uint64_t rd_bytes;
178 uint64_t wr_bytes;
179 uint64_t rd_ops;
180 uint64_t wr_ops;
181 uint64_t wr_highest_sector;
183 /* Whether the disk can expand beyond total_sectors */
184 int growable;
186 /* the memory alignment required for the buffers handled by this driver */
187 int buffer_alignment;
189 /* do we need to tell the quest if we have a volatile write cache? */
190 int enable_write_cache;
192 /* NOTE: the following infos are only hints for real hardware
193 drivers. They are not used by the block driver */
194 int cyls, heads, secs, translation;
195 int type;
196 BlockErrorAction on_read_error, on_write_error;
197 char device_name[32];
198 unsigned long *dirty_bitmap;
199 int64_t dirty_count;
200 QTAILQ_ENTRY(BlockDriverState) list;
201 void *private;
204 struct BlockDriverAIOCB {
205 AIOPool *pool;
206 BlockDriverState *bs;
207 BlockDriverCompletionFunc *cb;
208 void *opaque;
209 BlockDriverAIOCB *next;
212 void get_tmp_filename(char *filename, int size);
214 void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs,
215 BlockDriverCompletionFunc *cb, void *opaque);
216 void qemu_aio_release(void *p);
218 void *qemu_blockalign(BlockDriverState *bs, size_t size);
220 #ifdef _WIN32
221 int is_windows_drive(const char *filename);
222 #endif
224 typedef struct BlockConf {
225 BlockDriverState *bs;
226 uint16_t physical_block_size;
227 uint16_t logical_block_size;
228 uint16_t min_io_size;
229 uint32_t opt_io_size;
230 } BlockConf;
232 static inline unsigned int get_physical_block_exp(BlockConf *conf)
234 unsigned int exp = 0, size;
236 for (size = conf->physical_block_size;
237 size > conf->logical_block_size;
238 size >>= 1) {
239 exp++;
242 return exp;
245 #define DEFINE_BLOCK_PROPERTIES(_state, _conf) \
246 DEFINE_PROP_DRIVE("drive", _state, _conf.bs), \
247 DEFINE_PROP_UINT16("logical_block_size", _state, \
248 _conf.logical_block_size, 512), \
249 DEFINE_PROP_UINT16("physical_block_size", _state, \
250 _conf.physical_block_size, 512), \
251 DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
252 DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0)
254 #endif /* BLOCK_INT_H */