*/
bool is_format;
+ /*
+ * Set to true if the BlockDriver supports zoned children.
+ */
+ bool supports_zoned_children;
+
/*
* Drivers not implementing bdrv_parse_filename nor bdrv_open should have
* this field set to true, except ones that are defined only by their
*/
bool supports_backing;
- bool has_variable_length;
-
/*
* Drivers setting this field must be able to work with just a plain
* filename with '<protocol_name>:' as a prefix, and no other options.
* to allow driver-specific initialization code that requires
* the BQL, like setting up specific permission flags.
*/
- int (*bdrv_amend_pre_run)(BlockDriverState *bs, Error **errp);
+ int GRAPH_RDLOCK_PTR (*bdrv_amend_pre_run)(
+ BlockDriverState *bs, Error **errp);
/*
* This function is invoked under BQL after .bdrv_co_amend()
* to allow cleaning up what was done in .bdrv_amend_pre_run().
*/
- void (*bdrv_amend_clean)(BlockDriverState *bs);
+ void GRAPH_RDLOCK_PTR (*bdrv_amend_clean)(BlockDriverState *bs);
/*
* Return true if @to_replace can be replaced by a BDS with the
* same data as @bs without it affecting @bs's behavior (that is,
* without it being visible to @bs's parents).
*/
- bool (*bdrv_recurse_can_replace)(BlockDriverState *bs,
- BlockDriverState *to_replace);
+ bool GRAPH_RDLOCK_PTR (*bdrv_recurse_can_replace)(
+ BlockDriverState *bs, BlockDriverState *to_replace);
int (*bdrv_probe_device)(const char *filename);
Error **errp);
/* For handling image reopen for split or non-split files. */
- int (*bdrv_reopen_prepare)(BDRVReopenState *reopen_state,
- BlockReopenQueue *queue, Error **errp);
- void (*bdrv_reopen_commit)(BDRVReopenState *reopen_state);
- void (*bdrv_reopen_commit_post)(BDRVReopenState *reopen_state);
- void (*bdrv_reopen_abort)(BDRVReopenState *reopen_state);
+ int GRAPH_UNLOCKED_PTR (*bdrv_reopen_prepare)(
+ BDRVReopenState *reopen_state, BlockReopenQueue *queue, Error **errp);
+ void GRAPH_UNLOCKED_PTR (*bdrv_reopen_commit)(
+ BDRVReopenState *reopen_state);
+ void GRAPH_UNLOCKED_PTR (*bdrv_reopen_commit_post)(
+ BDRVReopenState *reopen_state);
+ void GRAPH_UNLOCKED_PTR (*bdrv_reopen_abort)(
+ BDRVReopenState *reopen_state);
void (*bdrv_join_options)(QDict *options, QDict *old_options);
- int (*bdrv_open)(BlockDriverState *bs, QDict *options, int flags,
- Error **errp);
+ int GRAPH_UNLOCKED_PTR (*bdrv_open)(
+ BlockDriverState *bs, QDict *options, int flags, Error **errp);
/* Protocol drivers should implement this instead of bdrv_open */
- int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags,
- Error **errp);
+ int GRAPH_UNLOCKED_PTR (*bdrv_file_open)(
+ BlockDriverState *bs, QDict *options, int flags, Error **errp);
void (*bdrv_close)(BlockDriverState *bs);
- int coroutine_fn (*bdrv_co_create)(BlockdevCreateOptions *opts,
- Error **errp);
- int coroutine_fn (*bdrv_co_create_opts)(BlockDriver *drv,
- const char *filename,
- QemuOpts *opts,
- Error **errp);
+ int coroutine_fn GRAPH_UNLOCKED_PTR (*bdrv_co_create)(
+ BlockdevCreateOptions *opts, Error **errp);
- int (*bdrv_amend_options)(BlockDriverState *bs,
- QemuOpts *opts,
- BlockDriverAmendStatusCB *status_cb,
- void *cb_opaque,
- bool force,
- Error **errp);
+ int coroutine_fn GRAPH_UNLOCKED_PTR (*bdrv_co_create_opts)(
+ BlockDriver *drv, const char *filename, QemuOpts *opts, Error **errp);
- int (*bdrv_make_empty)(BlockDriverState *bs);
+ int GRAPH_RDLOCK_PTR (*bdrv_amend_options)(
+ BlockDriverState *bs, QemuOpts *opts,
+ BlockDriverAmendStatusCB *status_cb, void *cb_opaque,
+ bool force, Error **errp);
+
+ int GRAPH_RDLOCK_PTR (*bdrv_make_empty)(BlockDriverState *bs);
/*
* Refreshes the bs->exact_filename field. If that is impossible,
* bs->exact_filename has to be left empty.
*/
- void (*bdrv_refresh_filename)(BlockDriverState *bs);
+ void GRAPH_RDLOCK_PTR (*bdrv_refresh_filename)(BlockDriverState *bs);
/*
* Gathers the open options for all children into @target.
* block driver which implements it is probably doing something
* shady regarding its runtime option structure.
*/
- void (*bdrv_gather_child_options)(BlockDriverState *bs, QDict *target,
- bool backing_overridden);
+ void GRAPH_RDLOCK_PTR (*bdrv_gather_child_options)(
+ BlockDriverState *bs, QDict *target, bool backing_overridden);
/*
* Returns an allocated string which is the directory name of this BDS: It
* will be used to make relative filenames absolute by prepending this
* function's return value to them.
*/
- char *(*bdrv_dirname)(BlockDriverState *bs, Error **errp);
+ char * GRAPH_RDLOCK_PTR (*bdrv_dirname)(BlockDriverState *bs, Error **errp);
/*
* This informs the driver that we are no longer interested in the result
*/
void (*bdrv_cancel_in_flight)(BlockDriverState *bs);
- int (*bdrv_inactivate)(BlockDriverState *bs);
+ int GRAPH_RDLOCK_PTR (*bdrv_inactivate)(BlockDriverState *bs);
+
+ int GRAPH_RDLOCK_PTR (*bdrv_snapshot_create)(
+ BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
+
+ int GRAPH_UNLOCKED_PTR (*bdrv_snapshot_goto)(
+ BlockDriverState *bs, const char *snapshot_id);
+
+ int GRAPH_RDLOCK_PTR (*bdrv_snapshot_delete)(
+ BlockDriverState *bs, const char *snapshot_id, const char *name,
+ Error **errp);
- int (*bdrv_snapshot_create)(BlockDriverState *bs,
- QEMUSnapshotInfo *sn_info);
- int (*bdrv_snapshot_goto)(BlockDriverState *bs,
- const char *snapshot_id);
- int (*bdrv_snapshot_delete)(BlockDriverState *bs,
- const char *snapshot_id,
- const char *name,
- Error **errp);
int (*bdrv_snapshot_list)(BlockDriverState *bs,
QEMUSnapshotInfo **psn_info);
int (*bdrv_snapshot_load_tmp)(BlockDriverState *bs,
int (*bdrv_debug_resume)(BlockDriverState *bs, const char *tag);
bool (*bdrv_debug_is_suspended)(BlockDriverState *bs, const char *tag);
- void (*bdrv_refresh_limits)(BlockDriverState *bs, Error **errp);
+ void GRAPH_RDLOCK_PTR (*bdrv_refresh_limits)(
+ BlockDriverState *bs, Error **errp);
/*
* Returns 1 if newly created images are guaranteed to contain only
void (*bdrv_attach_aio_context)(BlockDriverState *bs,
AioContext *new_context);
+ /**
+ * bdrv_drain_begin is called if implemented in the beginning of a
+ * drain operation to drain and stop any internal sources of requests in
+ * the driver.
+ * bdrv_drain_end is called if implemented at the end of the drain.
+ *
+ * They should be used by the driver to e.g. manage scheduled I/O
+ * requests, or toggle an internal state. After the end of the drain new
+ * requests will continue normally.
+ *
+ * Implementations of both functions must not call aio_poll().
+ */
+ void (*bdrv_drain_begin)(BlockDriverState *bs);
+ void (*bdrv_drain_end)(BlockDriverState *bs);
+
/**
* Try to get @bs's logical and physical block size.
* On success, store them in @bsz and return zero.
* On failure, return negative errno.
*/
- int (*bdrv_probe_blocksizes)(BlockDriverState *bs, BlockSizes *bsz);
+ int GRAPH_RDLOCK_PTR (*bdrv_probe_blocksizes)(
+ BlockDriverState *bs, BlockSizes *bsz);
/**
* Try to get @bs's geometry (cyls, heads, sectors)
* On success, store them in @geo and return 0.
*/
int (*bdrv_probe_geometry)(BlockDriverState *bs, HDGeometry *geo);
- void (*bdrv_add_child)(BlockDriverState *parent, BlockDriverState *child,
- Error **errp);
- void (*bdrv_del_child)(BlockDriverState *parent, BdrvChild *child,
- Error **errp);
+ void GRAPH_WRLOCK_PTR (*bdrv_add_child)(
+ BlockDriverState *parent, BlockDriverState *child, Error **errp);
+
+ void GRAPH_WRLOCK_PTR (*bdrv_del_child)(
+ BlockDriverState *parent, BdrvChild *child, Error **errp);
/**
* Informs the block driver that a permission change is intended. The
* If both conditions are met, 0 is returned. Otherwise, -errno is returned
* and errp is set to an error describing the conflict.
*/
- int (*bdrv_check_perm)(BlockDriverState *bs, uint64_t perm,
- uint64_t shared, Error **errp);
+ int GRAPH_RDLOCK_PTR (*bdrv_check_perm)(BlockDriverState *bs, uint64_t perm,
+ uint64_t shared, Error **errp);
/**
* Called to inform the driver that the set of cumulative set of used
- * permissions for @bs has changed to @perm, and the set of sharable
+ * permissions for @bs has changed to @perm, and the set of shareable
* permission to @shared. The driver can use this to propagate changes to
* its children (i.e. request permissions only if a parent actually needs
* them).
* This function is only invoked after bdrv_check_perm(), so block drivers
* may rely on preparations made in their .bdrv_check_perm implementation.
*/
- void (*bdrv_set_perm)(BlockDriverState *bs, uint64_t perm, uint64_t shared);
+ void GRAPH_RDLOCK_PTR (*bdrv_set_perm)(
+ BlockDriverState *bs, uint64_t perm, uint64_t shared);
/*
* Called to inform the driver that after a previous bdrv_check_perm()
* This function can be called even for nodes that never saw a
* bdrv_check_perm() call. It is a no-op then.
*/
- void (*bdrv_abort_perm_update)(BlockDriverState *bs);
+ void GRAPH_RDLOCK_PTR (*bdrv_abort_perm_update)(BlockDriverState *bs);
/**
* Returns in @nperm and @nshared the permissions that the driver for @bs
* permissions, but those that will be needed after applying the
* @reopen_queue.
*/
- void (*bdrv_child_perm)(BlockDriverState *bs, BdrvChild *c,
- BdrvChildRole role,
- BlockReopenQueue *reopen_queue,
- uint64_t parent_perm, uint64_t parent_shared,
- uint64_t *nperm, uint64_t *nshared);
+ void GRAPH_RDLOCK_PTR (*bdrv_child_perm)(
+ BlockDriverState *bs, BdrvChild *c, BdrvChildRole role,
+ BlockReopenQueue *reopen_queue,
+ uint64_t parent_perm, uint64_t parent_shared,
+ uint64_t *nperm, uint64_t *nshared);
/**
* Register/unregister a buffer for I/O. For example, when the driver is
*
* Returns: true on success, false on failure
*/
- bool (*bdrv_register_buf)(BlockDriverState *bs, void *host, size_t size,
- Error **errp);
- void (*bdrv_unregister_buf)(BlockDriverState *bs, void *host, size_t size);
+ bool GRAPH_RDLOCK_PTR (*bdrv_register_buf)(
+ BlockDriverState *bs, void *host, size_t size, Error **errp);
+ void GRAPH_RDLOCK_PTR (*bdrv_unregister_buf)(
+ BlockDriverState *bs, void *host, size_t size);
/*
* This field is modified only under the BQL, and is part of
int (*bdrv_probe)(const uint8_t *buf, int buf_size, const char *filename);
- int coroutine_fn (*bdrv_co_amend)(BlockDriverState *bs,
- BlockdevAmendOptions *opts,
- bool force,
- Error **errp);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_amend)(
+ BlockDriverState *bs, BlockdevAmendOptions *opts, bool force,
+ Error **errp);
/* aio */
- BlockAIOCB *(*bdrv_aio_preadv)(BlockDriverState *bs,
+ BlockAIOCB * GRAPH_RDLOCK_PTR (*bdrv_aio_preadv)(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
- BlockAIOCB *(*bdrv_aio_pwritev)(BlockDriverState *bs,
+
+ BlockAIOCB * GRAPH_RDLOCK_PTR (*bdrv_aio_pwritev)(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags, BlockCompletionFunc *cb, void *opaque);
- BlockAIOCB *(*bdrv_aio_flush)(BlockDriverState *bs,
- BlockCompletionFunc *cb, void *opaque);
- BlockAIOCB *(*bdrv_aio_pdiscard)(BlockDriverState *bs,
- int64_t offset, int bytes,
+
+ BlockAIOCB * GRAPH_RDLOCK_PTR (*bdrv_aio_flush)(
+ BlockDriverState *bs, BlockCompletionFunc *cb, void *opaque);
+
+ BlockAIOCB * GRAPH_RDLOCK_PTR (*bdrv_aio_pdiscard)(
+ BlockDriverState *bs, int64_t offset, int bytes,
BlockCompletionFunc *cb, void *opaque);
- int coroutine_fn (*bdrv_co_readv)(BlockDriverState *bs,
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_readv)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov);
/**
*
* The buffer in @qiov may point directly to guest memory.
*/
- int coroutine_fn (*bdrv_co_preadv)(BlockDriverState *bs,
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_preadv)(BlockDriverState *bs,
int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
- int coroutine_fn (*bdrv_co_preadv_part)(BlockDriverState *bs,
- int64_t offset, int64_t bytes,
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_preadv_part)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
QEMUIOVector *qiov, size_t qiov_offset,
BdrvRequestFlags flags);
- int coroutine_fn (*bdrv_co_writev)(BlockDriverState *bs,
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_writev)(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, QEMUIOVector *qiov,
int flags);
/**
*
* The buffer in @qiov may point directly to guest memory.
*/
- int coroutine_fn (*bdrv_co_pwritev)(BlockDriverState *bs,
- int64_t offset, int64_t bytes, QEMUIOVector *qiov,
- BdrvRequestFlags flags);
- int coroutine_fn (*bdrv_co_pwritev_part)(BlockDriverState *bs,
- int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset,
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pwritev)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes, QEMUIOVector *qiov,
BdrvRequestFlags flags);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pwritev_part)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes, QEMUIOVector *qiov,
+ size_t qiov_offset, BdrvRequestFlags flags);
/*
* Efficiently zero a region of the disk image. Typically an image format
* function pointer may be NULL or return -ENOSUP and .bdrv_co_writev()
* will be called instead.
*/
- int coroutine_fn (*bdrv_co_pwrite_zeroes)(BlockDriverState *bs,
- int64_t offset, int64_t bytes, BdrvRequestFlags flags);
- int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs,
- int64_t offset, int64_t bytes);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pwrite_zeroes)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ BdrvRequestFlags flags);
+
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pdiscard)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes);
/*
* Map [offset, offset + nbytes) range onto a child of @bs to copy from,
* See the comment of bdrv_co_copy_range for the parameter and return value
* semantics.
*/
- int coroutine_fn (*bdrv_co_copy_range_from)(BlockDriverState *bs,
- BdrvChild *src,
- int64_t offset,
- BdrvChild *dst,
- int64_t dst_offset,
- int64_t bytes,
- BdrvRequestFlags read_flags,
- BdrvRequestFlags write_flags);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_copy_range_from)(
+ BlockDriverState *bs, BdrvChild *src, int64_t offset,
+ BdrvChild *dst, int64_t dst_offset, int64_t bytes,
+ BdrvRequestFlags read_flags, BdrvRequestFlags write_flags);
/*
* Map [offset, offset + nbytes) range onto a child of bs to copy data to,
* See the comment of bdrv_co_copy_range for the parameter and return value
* semantics.
*/
- int coroutine_fn (*bdrv_co_copy_range_to)(BlockDriverState *bs,
- BdrvChild *src,
- int64_t src_offset,
- BdrvChild *dst,
- int64_t dst_offset,
- int64_t bytes,
- BdrvRequestFlags read_flags,
- BdrvRequestFlags write_flags);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_copy_range_to)(
+ BlockDriverState *bs, BdrvChild *src, int64_t src_offset,
+ BdrvChild *dst, int64_t dst_offset, int64_t bytes,
+ BdrvRequestFlags read_flags, BdrvRequestFlags write_flags);
/*
* Building block for bdrv_block_status[_above] and
* *pnum value for the block-status cache on protocol nodes, prior
* to clamping *pnum for return to its caller.
*/
- int coroutine_fn (*bdrv_co_block_status)(BlockDriverState *bs,
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_block_status)(
+ BlockDriverState *bs,
bool want_zero, int64_t offset, int64_t bytes, int64_t *pnum,
int64_t *map, BlockDriverState **file);
* - receive the snapshot's actual length (which may differ from bs's
* length)
*/
- int coroutine_fn (*bdrv_co_preadv_snapshot)(BlockDriverState *bs,
- int64_t offset, int64_t bytes, QEMUIOVector *qiov, size_t qiov_offset);
- int coroutine_fn (*bdrv_co_snapshot_block_status)(BlockDriverState *bs,
- bool want_zero, int64_t offset, int64_t bytes, int64_t *pnum,
- int64_t *map, BlockDriverState **file);
- int coroutine_fn (*bdrv_co_pdiscard_snapshot)(BlockDriverState *bs,
- int64_t offset, int64_t bytes);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_preadv_snapshot)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset);
+
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_snapshot_block_status)(
+ BlockDriverState *bs, bool want_zero, int64_t offset, int64_t bytes,
+ int64_t *pnum, int64_t *map, BlockDriverState **file);
+
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pdiscard_snapshot)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes);
/*
* Invalidate any cached meta-data.
* layers, if needed. This function is needed for deterministic
* synchronization of the flush finishing callback.
*/
- int coroutine_fn (*bdrv_co_flush)(BlockDriverState *bs);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_flush)(BlockDriverState *bs);
/* Delete a created file. */
- int coroutine_fn (*bdrv_co_delete_file)(BlockDriverState *bs,
- Error **errp);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_delete_file)(
+ BlockDriverState *bs, Error **errp);
/*
* Flushes all data that was already written to the OS all the way down to
* the disk (for example file-posix.c calls fsync()).
*/
- int coroutine_fn (*bdrv_co_flush_to_disk)(BlockDriverState *bs);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*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 coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_flush_to_os)(
+ BlockDriverState *bs);
/*
* Truncate @bs to @offset bytes using the given @prealloc mode
* If @exact is true and this function fails but would succeed
* with @exact = false, it should return -ENOTSUP.
*/
- int coroutine_fn (*bdrv_co_truncate)(BlockDriverState *bs, int64_t offset,
- bool exact, PreallocMode prealloc,
- BdrvRequestFlags flags, Error **errp);
- int64_t coroutine_fn (*bdrv_co_getlength)(BlockDriverState *bs);
- int64_t coroutine_fn (*bdrv_co_get_allocated_file_size)(
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_truncate)(
+ BlockDriverState *bs, int64_t offset, bool exact,
+ PreallocMode prealloc, BdrvRequestFlags flags, Error **errp);
+
+ int64_t coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_getlength)(
+ BlockDriverState *bs);
+
+ int64_t coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_get_allocated_file_size)(
BlockDriverState *bs);
BlockMeasureInfo *(*bdrv_measure)(QemuOpts *opts, BlockDriverState *in_bs,
Error **errp);
- int coroutine_fn (*bdrv_co_pwritev_compressed)(BlockDriverState *bs,
- int64_t offset, int64_t bytes, QEMUIOVector *qiov);
- int coroutine_fn (*bdrv_co_pwritev_compressed_part)(BlockDriverState *bs,
- int64_t offset, int64_t bytes, QEMUIOVector *qiov,
- size_t qiov_offset);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pwritev_compressed)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov);
- int coroutine_fn (*bdrv_co_get_info)(BlockDriverState *bs,
- BlockDriverInfo *bdi);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_pwritev_compressed_part)(
+ BlockDriverState *bs, int64_t offset, int64_t bytes,
+ QEMUIOVector *qiov, size_t qiov_offset);
- ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs,
- Error **errp);
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_get_info)(
+ BlockDriverState *bs, BlockDriverInfo *bdi);
+
+ ImageInfoSpecific * GRAPH_RDLOCK_PTR (*bdrv_get_specific_info)(
+ BlockDriverState *bs, Error **errp);
BlockStatsSpecific *(*bdrv_get_specific_stats)(BlockDriverState *bs);
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_save_vmstate)(
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_load_vmstate)(
BlockDriverState *bs, QEMUIOVector *qiov, int64_t pos);
+ int coroutine_fn (*bdrv_co_zone_report)(BlockDriverState *bs,
+ int64_t offset, unsigned int *nr_zones,
+ BlockZoneDescriptor *zones);
+ int coroutine_fn (*bdrv_co_zone_mgmt)(BlockDriverState *bs, BlockZoneOp op,
+ int64_t offset, int64_t len);
+ int coroutine_fn (*bdrv_co_zone_append)(BlockDriverState *bs,
+ int64_t *offset, QEMUIOVector *qiov,
+ BdrvRequestFlags flags);
+
/* removable device specific */
- bool coroutine_fn (*bdrv_co_is_inserted)(BlockDriverState *bs);
- void coroutine_fn (*bdrv_co_eject)(BlockDriverState *bs, bool eject_flag);
- void coroutine_fn (*bdrv_co_lock_medium)(BlockDriverState *bs, bool locked);
+ bool coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_is_inserted)(
+ BlockDriverState *bs);
+ void coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_eject)(
+ BlockDriverState *bs, bool eject_flag);
+ void coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_lock_medium)(
+ BlockDriverState *bs, bool locked);
/* to control generic scsi devices */
- BlockAIOCB *(*bdrv_aio_ioctl)(BlockDriverState *bs,
- unsigned long int req, void *buf,
+ BlockAIOCB *coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_aio_ioctl)(
+ BlockDriverState *bs, unsigned long int req, void *buf,
BlockCompletionFunc *cb, void *opaque);
- int coroutine_fn (*bdrv_co_ioctl)(BlockDriverState *bs,
- unsigned long int req, void *buf);
+
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_ioctl)(
+ BlockDriverState *bs, unsigned long int req, void *buf);
/*
* Returns 0 for completed check, -errno for internal errors.
int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_check)(
BlockDriverState *bs, BdrvCheckResult *result, BdrvCheckMode fix);
- void coroutine_fn (*bdrv_co_debug_event)(BlockDriverState *bs,
- BlkdebugEvent event);
-
- /* io queue for linux-aio */
- void coroutine_fn (*bdrv_co_io_plug)(BlockDriverState *bs);
- void coroutine_fn (*bdrv_co_io_unplug)(BlockDriverState *bs);
-
- /**
- * bdrv_drain_begin is called if implemented in the beginning of a
- * drain operation to drain and stop any internal sources of requests in
- * the driver.
- * bdrv_drain_end is called if implemented at the end of the drain.
- *
- * They should be used by the driver to e.g. manage scheduled I/O
- * requests, or toggle an internal state. After the end of the drain new
- * requests will continue normally.
- *
- * Implementations of both functions must not call aio_poll().
- */
- void (*bdrv_drain_begin)(BlockDriverState *bs);
- void (*bdrv_drain_end)(BlockDriverState *bs);
+ void coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_debug_event)(
+ BlockDriverState *bs, BlkdebugEvent event);
bool (*bdrv_supports_persistent_dirty_bitmap)(BlockDriverState *bs);
- bool coroutine_fn (*bdrv_co_can_store_new_dirty_bitmap)(
+
+ bool coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_can_store_new_dirty_bitmap)(
BlockDriverState *bs, const char *name, uint32_t granularity,
Error **errp);
- int coroutine_fn (*bdrv_co_remove_persistent_dirty_bitmap)(
+
+ int coroutine_fn GRAPH_RDLOCK_PTR (*bdrv_co_remove_persistent_dirty_bitmap)(
BlockDriverState *bs, const char *name, Error **errp);
};
-static inline bool block_driver_can_compress(BlockDriver *drv)
+static inline bool TSA_NO_TSA block_driver_can_compress(BlockDriver *drv)
{
return drv->bdrv_co_pwritev_compressed ||
drv->bdrv_co_pwritev_compressed_part;
/* maximum number of iovec elements */
int max_iov;
+
+ /*
+ * true if the length of the underlying file can change, and QEMU
+ * is expected to adjust automatically. Mostly for CD-ROM drives,
+ * whose length is zero when the tray is empty (they don't need
+ * an explicit monitor command to load the disk inside the guest).
+ */
+ bool has_variable_length;
+
+ /* device zone model */
+ BlockZoneModel zoned;
+
+ /* zone size expressed in bytes */
+ uint32_t zone_size;
+
+ /* total number of zones */
+ uint32_t nr_zones;
+
+ /* maximum sectors of a zone append write operation */
+ uint32_t max_append_sectors;
+
+ /* maximum number of open zones */
+ uint32_t max_open_zones;
+
+ /* maximum number of active zones */
+ uint32_t max_active_zones;
+
+ uint32_t write_granularity;
} BlockLimits;
typedef struct BdrvOpBlocker BdrvOpBlocker;
* when migration is completing) and it can start/stop requesting
* permissions and doing I/O on it.
*/
- void (*activate)(BdrvChild *child, Error **errp);
- int (*inactivate)(BdrvChild *child);
+ void GRAPH_RDLOCK_PTR (*activate)(BdrvChild *child, Error **errp);
+ int GRAPH_RDLOCK_PTR (*inactivate)(BdrvChild *child);
void GRAPH_WRLOCK_PTR (*attach)(BdrvChild *child);
void GRAPH_WRLOCK_PTR (*detach)(BdrvChild *child);
+ /*
+ * If this pair of functions is implemented, the parent doesn't issue new
+ * requests after returning from .drained_begin() until .drained_end() is
+ * called.
+ *
+ * These functions must not change the graph (and therefore also must not
+ * call aio_poll(), which could change the graph indirectly).
+ *
+ * Note that this can be nested. If drained_begin() was called twice, new
+ * I/O is allowed only after drained_end() was called twice, too.
+ */
+ void GRAPH_RDLOCK_PTR (*drained_begin)(BdrvChild *child);
+ void GRAPH_RDLOCK_PTR (*drained_end)(BdrvChild *child);
+
+ /*
+ * Returns whether the parent has pending requests for the child. This
+ * callback is polled after .drained_begin() has been called until all
+ * activity on the child has stopped.
+ */
+ bool GRAPH_RDLOCK_PTR (*drained_poll)(BdrvChild *child);
+
/*
* Notifies the parent that the filename of its child has changed (e.g.
* because the direct child was removed from the backing chain), so that it
const char *(*get_name)(BdrvChild *child);
AioContext *(*get_parent_aio_context)(BdrvChild *child);
-
- /*
- * If this pair of functions is implemented, the parent doesn't issue new
- * requests after returning from .drained_begin() until .drained_end() is
- * called.
- *
- * These functions must not change the graph (and therefore also must not
- * call aio_poll(), which could change the graph indirectly).
- *
- * Note that this can be nested. If drained_begin() was called twice, new
- * I/O is allowed only after drained_end() was called twice, too.
- */
- void (*drained_begin)(BdrvChild *child);
- void (*drained_end)(BdrvChild *child);
-
- /*
- * Returns whether the parent has pending requests for the child. This
- * callback is polled after .drained_begin() has been called until all
- * activity on the child has stopped.
- */
- bool (*drained_poll)(BdrvChild *child);
};
extern const BdrvChildClass child_of_bds;
*/
bool quiesced_parent;
- QLIST_ENTRY(BdrvChild) next;
- QLIST_ENTRY(BdrvChild) next_parent;
+ QLIST_ENTRY(BdrvChild GRAPH_RDLOCK_PTR) next;
+ QLIST_ENTRY(BdrvChild GRAPH_RDLOCK_PTR) next_parent;
};
/*
* See also comment in include/block/block.h, to learn how backing and file
* are connected with BdrvChildRole.
*/
- QLIST_HEAD(, BdrvChild) children;
+ QLIST_HEAD(, BdrvChild GRAPH_RDLOCK_PTR) children;
BdrvChild *backing;
BdrvChild *file;
- QLIST_HEAD(, BdrvChild) parents;
+ QLIST_HEAD(, BdrvChild GRAPH_RDLOCK_PTR) parents;
QDict *options;
QDict *explicit_options;
unsigned int in_flight;
unsigned int serialising_in_flight;
- /*
- * counter for nested bdrv_io_plug.
- * Accessed with atomic ops.
- */
- unsigned io_plugged;
-
/* do we need to tell the quest if we have a volatile write cache? */
int enable_write_cache;
unsigned int write_gen; /* Current data generation */
/* Protected by reqs_lock. */
- CoMutex reqs_lock;
+ QemuMutex reqs_lock;
QLIST_HEAD(, BdrvTrackedRequest) tracked_requests;
CoQueue flush_queue; /* Serializing flush queue */
bool active_flush_req; /* Flush request in flight? */
CoMutex bsc_modify_lock;
/* Always non-NULL, but must only be dereferenced under an RCU read guard */
BdrvBlockStatusCache *block_status_cache;
+
+ /* array of write pointers' location of each zone in the zoned device. */
+ BlockZoneWps *wps;
};
struct BlockBackendRootState {
/*
* Common functions that are neither I/O nor Global State.
*
- * See include/block/block-commmon.h for more information about
+ * See include/block/block-common.h for more information about
* the Common API.
*/
projects / mirror_qemu.git / blobdiff