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author | 2006-08-01 16:21:11 +0000 | |
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committer | 2006-08-01 16:21:11 +0000 | |
commit | 83f6409109acd7cd13ff8a603f29c46033c4fb00 (patch) | |
tree | e06b75a308f58785b6c646d192e8e53fda006e20 /block_int.h | |
parent | commit to specific devices (diff) | |
download | qemu-kvm-83f6409109acd7cd13ff8a603f29c46033c4fb00.tar.gz qemu-kvm-83f6409109acd7cd13ff8a603f29c46033c4fb00.tar.bz2 qemu-kvm-83f6409109acd7cd13ff8a603f29c46033c4fb00.zip |
async file I/O API
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2075 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'block_int.h')
-rw-r--r-- | block_int.h | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/block_int.h b/block_int.h index c2a2e30a9..e40503ea3 100644 --- a/block_int.h +++ b/block_int.h @@ -28,7 +28,7 @@ struct BlockDriver { 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 @@ struct BlockDriver { 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 @@ struct BlockDriverState { 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 @@ struct BlockDriverState { 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 */ |