diff options
Diffstat (limited to 'include/block/block_int.h')
| -rw-r--r-- | include/block/block_int.h | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index 10d87595be..a029c2003f 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -38,12 +38,12 @@ #include "qemu/throttle.h" #define BLOCK_FLAG_ENCRYPT 1 -#define BLOCK_FLAG_COMPAT6 4 #define BLOCK_FLAG_LAZY_REFCOUNTS 8 #define BLOCK_OPT_SIZE "size" #define BLOCK_OPT_ENCRYPT "encryption" #define BLOCK_OPT_COMPAT6 "compat6" +#define BLOCK_OPT_HWVERSION "hwversion" #define BLOCK_OPT_BACKING_FILE "backing_file" #define BLOCK_OPT_BACKING_FMT "backing_fmt" #define BLOCK_OPT_CLUSTER_SIZE "cluster_size" @@ -127,10 +127,6 @@ struct BlockDriver { Error **errp); int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags, Error **errp); - int (*bdrv_read)(BlockDriverState *bs, int64_t sector_num, - uint8_t *buf, int nb_sectors); - int (*bdrv_write)(BlockDriverState *bs, int64_t sector_num, - const uint8_t *buf, int nb_sectors); void (*bdrv_close)(BlockDriverState *bs); int (*bdrv_create)(const char *filename, QemuOpts *opts, Error **errp); int (*bdrv_set_key)(BlockDriverState *bs, const char *key); @@ -153,18 +149,20 @@ struct BlockDriver { int coroutine_fn (*bdrv_co_readv)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); + int coroutine_fn (*bdrv_co_preadv)(BlockDriverState *bs, + uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags); int coroutine_fn (*bdrv_co_writev)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov); int coroutine_fn (*bdrv_co_writev_flags)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *qiov, int flags); - - int supported_write_flags; + int coroutine_fn (*bdrv_co_pwritev)(BlockDriverState *bs, + uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags); /* * Efficiently zero a region of the disk image. Typically an image format * would use a compact metadata representation to implement this. This - * function pointer may be NULL and .bdrv_co_writev() will be called - * instead. + * function pointer may be NULL or return -ENOSUP and .bdrv_co_writev() + * will be called instead. */ int coroutine_fn (*bdrv_co_write_zeroes)(BlockDriverState *bs, int64_t sector_num, int nb_sectors, BdrvRequestFlags flags); @@ -294,7 +292,6 @@ struct BlockDriver { /* io queue for linux-aio */ void (*bdrv_io_plug)(BlockDriverState *bs); void (*bdrv_io_unplug)(BlockDriverState *bs); - void (*bdrv_flush_io_queue)(BlockDriverState *bs); /** * Try to get @bs's logical and physical block size. @@ -317,6 +314,11 @@ struct BlockDriver { */ void (*bdrv_drain)(BlockDriverState *bs); + void (*bdrv_add_child)(BlockDriverState *parent, BlockDriverState *child, + Error **errp); + void (*bdrv_del_child)(BlockDriverState *parent, BdrvChild *child, + Error **errp); + QLIST_ENTRY(BlockDriver) list; }; @@ -424,10 +426,10 @@ struct BlockDriverState { /* I/O throttling. * throttle_state tells us if this BDS has I/O limits configured. - * io_limits_enabled tells us if they are currently being - * enforced, but it can be temporarily set to false */ + * io_limits_disabled tells us if they are currently being enforced */ CoQueue throttled_reqs[2]; - bool io_limits_enabled; + unsigned int io_limits_disabled; + /* The following fields are protected by the ThrottleGroup lock. * See the ThrottleGroup documentation for details. */ ThrottleState *throttle_state; @@ -446,6 +448,11 @@ struct BlockDriverState { /* Alignment requirement for offset/length of I/O requests */ unsigned int request_alignment; + /* Flags honored during pwrite (so far: BDRV_REQ_FUA) */ + unsigned int supported_write_flags; + /* Flags honored during write_zeroes (so far: BDRV_REQ_FUA, + * BDRV_REQ_MAY_UNMAP) */ + unsigned int supported_zero_flags; /* the following member gives a name to every node on the bs graph. */ char node_name[32]; @@ -484,6 +491,10 @@ struct BlockDriverState { uint64_t write_threshold_offset; NotifierWithReturn write_threshold_notifier; + /* counters for nested bdrv_io_plug and bdrv_io_unplugged_begin */ + unsigned io_plugged; + unsigned io_plug_disabled; + int quiesce_counter; }; @@ -517,10 +528,10 @@ extern BlockDriver bdrv_qcow2; */ void bdrv_setup_io_funcs(BlockDriver *bdrv); -int coroutine_fn bdrv_co_do_preadv(BlockDriverState *bs, +int coroutine_fn bdrv_co_preadv(BlockDriverState *bs, int64_t offset, unsigned int bytes, QEMUIOVector *qiov, BdrvRequestFlags flags); -int coroutine_fn bdrv_co_do_pwritev(BlockDriverState *bs, +int coroutine_fn bdrv_co_pwritev(BlockDriverState *bs, int64_t offset, unsigned int bytes, QEMUIOVector *qiov, BdrvRequestFlags flags); @@ -713,6 +724,9 @@ BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs, const BdrvChildRole *child_role); void bdrv_root_unref_child(BdrvChild *child); +void bdrv_no_throttling_begin(BlockDriverState *bs); +void bdrv_no_throttling_end(BlockDriverState *bs); + void blk_dev_change_media_cb(BlockBackend *blk, bool load); bool blk_dev_has_removable_media(BlockBackend *blk); bool blk_dev_has_tray(BlockBackend *blk); |