async file I/O API
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2075 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/block_int.h b/block_int.h
index c2a2e30..e40503e 100644
--- a/block_int.h
+++ b/block_int.h
@@ -28,7 +28,7 @@
const char *format_name;
int instance_size;
int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
- int (*bdrv_open)(BlockDriverState *bs, const char *filename);
+ int (*bdrv_open)(BlockDriverState *bs, const char *filename, int flags);
int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors);
int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num,
@@ -41,11 +41,28 @@
int nb_sectors, int *pnum);
int (*bdrv_set_key)(BlockDriverState *bs, const char *key);
int (*bdrv_make_empty)(BlockDriverState *bs);
+ /* aio */
+ int (*bdrv_aio_new)(BlockDriverAIOCB *acb);
+ int (*bdrv_aio_read)(BlockDriverAIOCB *acb, int64_t sector_num,
+ uint8_t *buf, int nb_sectors);
+ int (*bdrv_aio_write)(BlockDriverAIOCB *acb, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors);
+ void (*bdrv_aio_cancel)(BlockDriverAIOCB *acb);
+ void (*bdrv_aio_delete)(BlockDriverAIOCB *acb);
+
+ const char *protocol_name;
+ int (*bdrv_pread)(BlockDriverState *bs, int64_t offset,
+ uint8_t *buf, int count);
+ int (*bdrv_pwrite)(BlockDriverState *bs, int64_t offset,
+ const uint8_t *buf, int count);
+ int (*bdrv_truncate)(BlockDriverState *bs, int64_t offset);
+ int64_t (*bdrv_getlength)(BlockDriverState *bs);
+
struct BlockDriver *next;
};
struct BlockDriverState {
- int64_t total_sectors;
+ int64_t total_sectors; /* XXX: will be suppressed */
int read_only; /* if true, the media is read only */
int inserted; /* if true, the media is present */
int removable; /* if true, the media can be removed */
@@ -67,6 +84,9 @@
int is_temporary;
BlockDriverState *backing_hd;
+ /* sync read/write emulation */
+
+ BlockDriverAIOCB *sync_aiocb;
/* NOTE: the following infos are only hints for real hardware
drivers. They are not used by the block driver */
@@ -76,6 +96,14 @@
BlockDriverState *next;
};
+struct BlockDriverAIOCB {
+ BlockDriverState *bs;
+ BlockDriverCompletionFunc *cb;
+ void *cb_opaque;
+
+ void *opaque; /* driver opaque */
+};
+
void get_tmp_filename(char *filename, int size);
#endif /* BLOCK_INT_H */