diff options
Diffstat (limited to 'block_int.h')
| -rw-r--r-- | block_int.h | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/block_int.h b/block_int.h index 77c0187c3d..311bd2a6fa 100644 --- a/block_int.h +++ b/block_int.h @@ -34,6 +34,13 @@ #define BLOCK_FLAG_ENCRYPT 1 #define BLOCK_FLAG_COMPAT6 4 +#define BLOCK_IO_LIMIT_READ 0 +#define BLOCK_IO_LIMIT_WRITE 1 +#define BLOCK_IO_LIMIT_TOTAL 2 + +#define BLOCK_IO_SLICE_TIME 100000000 +#define NANOSECONDS_PER_SECOND 1000000000.0 + #define BLOCK_OPT_SIZE "size" #define BLOCK_OPT_ENCRYPT "encryption" #define BLOCK_OPT_COMPAT6 "compat6" @@ -44,12 +51,24 @@ #define BLOCK_OPT_PREALLOC "preallocation" #define BLOCK_OPT_SUBFMT "subformat" +typedef struct BdrvTrackedRequest BdrvTrackedRequest; + typedef struct AIOPool { void (*cancel)(BlockDriverAIOCB *acb); int aiocb_size; BlockDriverAIOCB *free_aiocb; } AIOPool; +typedef struct BlockIOLimit { + int64_t bps[3]; + int64_t iops[3]; +} BlockIOLimit; + +typedef struct BlockIOBaseValue { + uint64_t bytes[2]; + uint64_t ios[2]; +} BlockIOBaseValue; + struct BlockDriver { const char *format_name; int instance_size; @@ -63,8 +82,6 @@ struct BlockDriver { const uint8_t *buf, int nb_sectors); void (*bdrv_close)(BlockDriverState *bs); int (*bdrv_create)(const char *filename, QEMUOptionParameter *options); - int (*bdrv_is_allocated)(BlockDriverState *bs, int64_t sector_num, - int nb_sectors, int *pnum); int (*bdrv_set_key)(BlockDriverState *bs, const char *key); int (*bdrv_make_empty)(BlockDriverState *bs); /* aio */ @@ -86,6 +103,8 @@ struct BlockDriver { int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); int coroutine_fn (*bdrv_co_discard)(BlockDriverState *bs, int64_t sector_num, int nb_sectors); + int coroutine_fn (*bdrv_co_is_allocated)(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, int *pnum); /* * Invalidate any cached meta-data. @@ -179,6 +198,8 @@ struct BlockDriverState { int encrypted; /* if true, the media is encrypted */ int valid_key; /* if true, a valid encryption key has been set */ int sg; /* if true, the device is a /dev/sg* */ + int copy_on_read; /* if true, copy read backing sectors into image + note this is a reference count */ BlockDriver *drv; /* NULL means no media */ void *opaque; @@ -201,6 +222,16 @@ struct BlockDriverState { void *sync_aiocb; + /* the time for latest disk I/O */ + int64_t slice_time; + int64_t slice_start; + int64_t slice_end; + BlockIOLimit io_limits; + BlockIOBaseValue io_base; + CoQueue throttled_reqs; + QEMUTimer *block_timer; + bool io_limits_enabled; + /* I/O stats (display with "info blockstats"). */ uint64_t nr_bytes[BDRV_MAX_IOTYPE]; uint64_t nr_ops[BDRV_MAX_IOTYPE]; @@ -228,6 +259,8 @@ struct BlockDriverState { int in_use; /* users other than guest access, eg. block migration */ QTAILQ_ENTRY(BlockDriverState) list; void *private; + + QLIST_HEAD(, BdrvTrackedRequest) tracked_requests; }; struct BlockDriverAIOCB { @@ -244,6 +277,9 @@ void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, BlockDriverCompletionFunc *cb, void *opaque); void qemu_aio_release(void *p); +void bdrv_set_io_limits(BlockDriverState *bs, + BlockIOLimit *io_limits); + #ifdef _WIN32 int is_windows_drive(const char *filename); #endif |