X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=block.h;h=415bb17c738988344e857f4456147f0b9291d904;hb=1829851cfee10e196abec50325d828de182fd356;hp=59cc410e3b1915b2944445824cbabe4cc22f96fd;hpb=cfe7bb19d2e717c4ad763879515a8b8bd1ca19c5;p=qemu.git diff --git a/block.h b/block.h index 59cc410e3..415bb17c7 100644 --- a/block.h +++ b/block.h @@ -4,6 +4,7 @@ #include "qemu-aio.h" #include "qemu-common.h" #include "qemu-option.h" +#include "qemu-coroutine.h" #include "qobject.h" /* block.c */ @@ -20,13 +21,48 @@ typedef struct QEMUSnapshotInfo { char id_str[128]; /* unique snapshot id */ /* the following fields are informative. They are not needed for the consistency of the snapshot */ - char name[256]; /* user choosen name */ - uint32_t vm_state_size; /* VM state info size */ + char name[256]; /* user chosen name */ + uint64_t vm_state_size; /* VM state info size */ uint32_t date_sec; /* UTC date of the snapshot */ uint32_t date_nsec; uint64_t vm_clock_nsec; /* VM clock relative to boot */ } QEMUSnapshotInfo; +/* Callbacks for block device models */ +typedef struct BlockDevOps { + /* + * Runs when virtual media changed (monitor commands eject, change) + * Argument load is true on load and false on eject. + * Beware: doesn't run when a host device's physical media + * changes. Sure would be useful if it did. + * Device models with removable media must implement this callback. + */ + void (*change_media_cb)(void *opaque, bool load); + /* + * Runs when an eject request is issued from the monitor, the tray + * is closed, and the medium is locked. + * Device models that do not implement is_medium_locked will not need + * this callback. Device models that can lock the medium or tray might + * want to implement the callback and unlock the tray when "force" is + * true, even if they do not support eject requests. + */ + void (*eject_request_cb)(void *opaque, bool force); + /* + * Is the virtual tray open? + * Device models implement this only when the device has a tray. + */ + bool (*is_tray_open)(void *opaque); + /* + * Is the virtual medium locked into the device? + * Device models implement this only when device has such a lock. + */ + bool (*is_medium_locked)(void *opaque); + /* + * Runs when the size changed (e.g. monitor command block_resize) + */ + void (*resize_cb)(void *opaque); +} BlockDevOps; + #define BDRV_O_RDWR 0x0002 #define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */ #define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */ @@ -34,6 +70,7 @@ typedef struct QEMUSnapshotInfo { #define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */ #define BDRV_O_NO_BACKING 0x0100 /* don't open the backing file */ #define BDRV_O_NO_FLUSH 0x0200 /* disable flushing on this disk */ +#define BDRV_O_COPY_ON_READ 0x0400 /* copy read backing sectors into image */ #define BDRV_O_CACHE_MASK (BDRV_O_NOCACHE | BDRV_O_CACHE_WB | BDRV_O_NO_FLUSH) @@ -48,15 +85,25 @@ typedef enum { typedef enum { BDRV_ACTION_REPORT, BDRV_ACTION_IGNORE, BDRV_ACTION_STOP -} BlockMonEventAction; - -void bdrv_mon_event(const BlockDriverState *bdrv, - BlockMonEventAction action, int is_read); +} BlockQMPEventAction; + +void bdrv_iostatus_enable(BlockDriverState *bs); +void bdrv_iostatus_reset(BlockDriverState *bs); +void bdrv_iostatus_disable(BlockDriverState *bs); +bool bdrv_iostatus_is_enabled(const BlockDriverState *bs); +void bdrv_iostatus_set_err(BlockDriverState *bs, int error); +void bdrv_emit_qmp_error_event(const BlockDriverState *bdrv, + BlockQMPEventAction action, int is_read); void bdrv_info_print(Monitor *mon, const QObject *data); void bdrv_info(Monitor *mon, QObject **ret_data); void bdrv_stats_print(Monitor *mon, const QObject *data); void bdrv_info_stats(Monitor *mon, QObject **ret_data); +/* disk I/O throttling */ +void bdrv_io_limits_enable(BlockDriverState *bs); +void bdrv_io_limits_disable(BlockDriverState *bs); +bool bdrv_io_limits_enabled(BlockDriverState *bs); + void bdrv_init(void); void bdrv_init_with_whitelist(void); BlockDriver *bdrv_find_protocol(const char *filename); @@ -67,14 +114,23 @@ int bdrv_create(BlockDriver *drv, const char* filename, int bdrv_create_file(const char* filename, QEMUOptionParameter *options); BlockDriverState *bdrv_new(const char *device_name); void bdrv_make_anon(BlockDriverState *bs); +void bdrv_append(BlockDriverState *bs_new, BlockDriverState *bs_top); void bdrv_delete(BlockDriverState *bs); +int bdrv_parse_cache_flags(const char *mode, int *flags); int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags); int bdrv_open(BlockDriverState *bs, const char *filename, int flags, BlockDriver *drv); void bdrv_close(BlockDriverState *bs); -int bdrv_attach(BlockDriverState *bs, DeviceState *qdev); -void bdrv_detach(BlockDriverState *bs, DeviceState *qdev); -DeviceState *bdrv_get_attached(BlockDriverState *bs); +int bdrv_attach_dev(BlockDriverState *bs, void *dev); +void bdrv_attach_dev_nofail(BlockDriverState *bs, void *dev); +void bdrv_detach_dev(BlockDriverState *bs, void *dev); +void *bdrv_get_attached_dev(BlockDriverState *bs); +void bdrv_set_dev_ops(BlockDriverState *bs, const BlockDevOps *ops, + void *opaque); +void bdrv_dev_eject_request(BlockDriverState *bs, bool force); +bool bdrv_dev_has_removable_media(BlockDriverState *bs); +bool bdrv_dev_is_tray_open(BlockDriverState *bs); +bool bdrv_dev_is_medium_locked(BlockDriverState *bs); int bdrv_read(BlockDriverState *bs, int64_t sector_num, uint8_t *buf, int nb_sectors); int bdrv_write(BlockDriverState *bs, int64_t sector_num, @@ -85,15 +141,31 @@ int bdrv_pwrite(BlockDriverState *bs, int64_t offset, const void *buf, int count); int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, const void *buf, int count); -int bdrv_write_sync(BlockDriverState *bs, int64_t sector_num, - const uint8_t *buf, int nb_sectors); +int coroutine_fn bdrv_co_readv(BlockDriverState *bs, int64_t sector_num, + int nb_sectors, QEMUIOVector *qiov); +int coroutine_fn bdrv_co_copy_on_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); +/* + * Efficiently zero a region of the disk image. Note that this is a regular + * I/O request like read or write and should have a reasonable size. This + * function is not suitable for zeroing the entire image in a single request + * because it may allocate memory for the entire region. + */ +int coroutine_fn bdrv_co_write_zeroes(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); +BlockDriverState *bdrv_find_backing_image(BlockDriverState *bs, + const char *backing_file); int bdrv_truncate(BlockDriverState *bs, int64_t offset); int64_t bdrv_getlength(BlockDriverState *bs); int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr); void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs); int bdrv_commit(BlockDriverState *bs); -void bdrv_commit_all(void); +int bdrv_commit_all(void); int bdrv_change_backing_file(BlockDriverState *bs, const char *backing_file, const char *backing_fmt); void bdrv_register(BlockDriver *bdrv); @@ -120,6 +192,9 @@ BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, BlockDriverCompletionFunc *cb, void *opaque); BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, BlockDriverCompletionFunc *cb, void *opaque); +BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, + BlockDriverCompletionFunc *cb, void *opaque); void bdrv_aio_cancel(BlockDriverAIOCB *acb); typedef struct BlockRequest { @@ -143,12 +218,19 @@ BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, unsigned long int req, void *buf, BlockDriverCompletionFunc *cb, void *opaque); +/* Invalidate any cached metadata used by image formats */ +void bdrv_invalidate_cache(BlockDriverState *bs); +void bdrv_invalidate_cache_all(void); + /* Ensure contents are flushed to disk. */ int bdrv_flush(BlockDriverState *bs); +int coroutine_fn bdrv_co_flush(BlockDriverState *bs); void bdrv_flush_all(void); void bdrv_close_all(void); +void bdrv_drain_all(void); int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); +int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); int bdrv_has_zero_init(BlockDriverState *bs); int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum); @@ -171,26 +253,28 @@ typedef enum FDriveType { FDRIVE_DRV_NONE = 0x03, /* No drive connected */ } FDriveType; +typedef enum FDriveRate { + FDRIVE_RATE_500K = 0x00, /* 500 Kbps */ + FDRIVE_RATE_300K = 0x01, /* 300 Kbps */ + FDRIVE_RATE_250K = 0x02, /* 250 Kbps */ + FDRIVE_RATE_1M = 0x03, /* 1 Mbps */ +} FDriveRate; + void bdrv_get_floppy_geometry_hint(BlockDriverState *bs, int *nb_heads, int *max_track, int *last_sect, - FDriveType drive_in, FDriveType *drive); + FDriveType drive_in, FDriveType *drive, + FDriveRate *rate); int bdrv_get_translation_hint(BlockDriverState *bs); void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error, BlockErrorAction on_write_error); BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read); -void bdrv_set_removable(BlockDriverState *bs, int removable); -int bdrv_is_removable(BlockDriverState *bs); int bdrv_is_read_only(BlockDriverState *bs); int bdrv_is_sg(BlockDriverState *bs); int bdrv_enable_write_cache(BlockDriverState *bs); int bdrv_is_inserted(BlockDriverState *bs); int bdrv_media_changed(BlockDriverState *bs); -int bdrv_is_locked(BlockDriverState *bs); -void bdrv_set_locked(BlockDriverState *bs, int locked); -int bdrv_eject(BlockDriverState *bs, int eject_flag); -void bdrv_set_change_cb(BlockDriverState *bs, - void (*change_cb)(void *opaque, int reason), - void *opaque); +void bdrv_lock_medium(BlockDriverState *bs, bool locked); +void bdrv_eject(BlockDriverState *bs, bool eject_flag); void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size); BlockDriverState *bdrv_find(const char *name); BlockDriverState *bdrv_next(BlockDriverState *bs); @@ -240,6 +324,9 @@ int bdrv_img_create(const char *filename, const char *fmt, const char *base_filename, const char *base_fmt, char *options, uint64_t img_size, int flags); +void bdrv_set_buffer_alignment(BlockDriverState *bs, int align); +void *qemu_blockalign(BlockDriverState *bs, size_t size); + #define BDRV_SECTORS_PER_DIRTY_CHUNK 2048 void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable); @@ -248,9 +335,29 @@ void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors); int64_t bdrv_get_dirty_count(BlockDriverState *bs); +void bdrv_enable_copy_on_read(BlockDriverState *bs); +void bdrv_disable_copy_on_read(BlockDriverState *bs); + void bdrv_set_in_use(BlockDriverState *bs, int in_use); int bdrv_in_use(BlockDriverState *bs); +enum BlockAcctType { + BDRV_ACCT_READ, + BDRV_ACCT_WRITE, + BDRV_ACCT_FLUSH, + BDRV_MAX_IOTYPE, +}; + +typedef struct BlockAcctCookie { + int64_t bytes; + int64_t start_time_ns; + enum BlockAcctType type; +} BlockAcctCookie; + +void bdrv_acct_start(BlockDriverState *bs, BlockAcctCookie *cookie, + int64_t bytes, enum BlockAcctType type); +void bdrv_acct_done(BlockDriverState *bs, BlockAcctCookie *cookie); + typedef enum { BLKDBG_L1_UPDATE, @@ -302,4 +409,43 @@ typedef enum { #define BLKDBG_EVENT(bs, evt) bdrv_debug_event(bs, evt) void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event); + +/* Convenience for block device models */ + +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) + #endif +