#include "qemu-queue.h"
#include "qemu-coroutine.h"
#include "qemu-timer.h"
+#include "qapi-types.h"
#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"
#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;
+
+typedef void BlockJobCancelFunc(void *opaque);
+typedef struct BlockJob BlockJob;
+typedef struct BlockJobType {
+ /** Derived BlockJob struct size */
+ size_t instance_size;
+
+ /** String describing the operation, part of query-block-jobs QMP API */
+ const char *job_type;
+
+ /** Optional callback for job types that support setting a speed limit */
+ int (*set_speed)(BlockJob *job, int64_t value);
+} BlockJobType;
+
+/**
+ * Long-running operation on a BlockDriverState
+ */
+struct BlockJob {
+ const BlockJobType *job_type;
+ BlockDriverState *bs;
+ bool cancelled;
+
+ /* These fields are published by the query-block-jobs QMP API */
+ int64_t offset;
+ int64_t len;
+ int64_t speed;
+
+ BlockDriverCompletionFunc *cb;
+ void *opaque;
+};
+
struct BlockDriver {
const char *format_name;
int instance_size;
const uint8_t *buf, int nb_sectors);
void (*bdrv_close)(BlockDriverState *bs);
int (*bdrv_create)(const char *filename, QEMUOptionParameter *options);
- int (*bdrv_flush)(BlockDriverState *bs);
- 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 */
BlockDriverCompletionFunc *cb, void *opaque);
BlockDriverAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
BlockDriverCompletionFunc *cb, void *opaque);
- int (*bdrv_discard)(BlockDriverState *bs, int64_t sector_num,
- int nb_sectors);
+ BlockDriverAIOCB *(*bdrv_aio_discard)(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque);
int coroutine_fn (*bdrv_co_readv)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
int coroutine_fn (*bdrv_co_writev)(BlockDriverState *bs,
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.
+ */
+ void (*bdrv_invalidate_cache)(BlockDriverState *bs);
+
+ /*
+ * Flushes all data that was already written to the OS all the way down to
+ * the disk (for example raw-posix calls fsync()).
+ */
+ int coroutine_fn (*bdrv_co_flush_to_disk)(BlockDriverState *bs);
+
+ /*
+ * Flushes all internal caches to the OS. The data may still sit in a
+ * writeback cache of the host OS, but it will survive a crash of the qemu
+ * process.
+ */
+ int coroutine_fn (*bdrv_co_flush_to_os)(BlockDriverState *bs);
int (*bdrv_aio_multiwrite)(BlockDriverState *bs, BlockRequest *reqs,
int num_reqs);
int (*bdrv_is_inserted)(BlockDriverState *bs);
int (*bdrv_media_changed)(BlockDriverState *bs);
void (*bdrv_eject)(BlockDriverState *bs, int eject_flag);
- void (*bdrv_set_locked)(BlockDriverState *bs, int locked);
+ void (*bdrv_lock_medium)(BlockDriverState *bs, bool locked);
/* to control generic scsi devices */
int (*bdrv_ioctl)(BlockDriverState *bs, unsigned long int req, void *buf);
int read_only; /* if true, the media is read only */
int keep_read_only; /* if true, the media was requested to stay read only */
int open_flags; /* flags used to open the file, re-used for re-open */
- int removable; /* if true, the media can be removed */
- int locked; /* if true, the media cannot temporarily be ejected */
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;
BlockDriverState *backing_hd;
BlockDriverState *file;
+ /* number of in-flight copy-on-read requests */
+ unsigned int copy_on_read_in_flight;
+
/* async read/write emulation */
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];
drivers. They are not used by the block driver */
int cyls, heads, secs, translation;
BlockErrorAction on_read_error, on_write_error;
+ bool iostatus_enabled;
+ BlockDeviceIoStatus iostatus;
char device_name[32];
unsigned long *dirty_bitmap;
int64_t dirty_count;
int in_use; /* users other than guest access, eg. block migration */
QTAILQ_ENTRY(BlockDriverState) list;
void *private;
+
+ QLIST_HEAD(, BdrvTrackedRequest) tracked_requests;
+
+ /* long-running background operation */
+ BlockJob *job;
};
struct BlockDriverAIOCB {
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
-typedef struct BlockConf {
- BlockDriverState *bs;
- uint16_t physical_block_size;
- uint16_t logical_block_size;
- uint16_t min_io_size;
- uint32_t opt_io_size;
- int32_t bootindex;
- uint32_t discard_granularity;
-} BlockConf;
-
-static inline unsigned int get_physical_block_exp(BlockConf *conf)
-{
- unsigned int exp = 0, size;
-
- for (size = conf->physical_block_size;
- size > conf->logical_block_size;
- size >>= 1) {
- exp++;
- }
-
- return exp;
-}
-
-#define DEFINE_BLOCK_PROPERTIES(_state, _conf) \
- DEFINE_PROP_DRIVE("drive", _state, _conf.bs), \
- DEFINE_PROP_UINT16("logical_block_size", _state, \
- _conf.logical_block_size, 512), \
- DEFINE_PROP_UINT16("physical_block_size", _state, \
- _conf.physical_block_size, 512), \
- DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
- DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
- DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1), \
- DEFINE_PROP_UINT32("discard_granularity", _state, \
- _conf.discard_granularity, 0)
+void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque);
+void block_job_complete(BlockJob *job, int ret);
+int block_job_set_speed(BlockJob *job, int64_t value);
+void block_job_cancel(BlockJob *job);
+bool block_job_is_cancelled(BlockJob *job);
+
+int stream_start(BlockDriverState *bs, BlockDriverState *base,
+ const char *base_id, BlockDriverCompletionFunc *cb,
+ void *opaque);
#endif /* BLOCK_INT_H */
projects / lisovros / qemu_apohw.git / blobdiff