2 * Declarations for long-running block device operations
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30 #include "block/block.h"
31 #include "qemu/ratelimit.h"
33 #define BLOCK_JOB_SLICE_TIME 100000000ULL /* ns */
35 typedef struct BlockJobDriver BlockJobDriver
;
40 * Long-running operation on a BlockDriverState.
42 typedef struct BlockJob
{
43 /** Data belonging to the generic Job infrastructure */
46 /** Status that is published by the query-block-jobs QMP API */
47 BlockDeviceIoStatus iostatus
;
49 /** Speed that was set with @block_job_set_speed. */
52 /** Rate limiting data structure for implementing @speed. */
55 /** Block other operations when block job is running */
58 /** Called when a cancelled job is finalised. */
59 Notifier finalize_cancelled_notifier
;
61 /** Called when a successfully completed job is finalised. */
62 Notifier finalize_completed_notifier
;
64 /** Called when the job transitions to PENDING */
65 Notifier pending_notifier
;
67 /** Called when the job transitions to READY */
68 Notifier ready_notifier
;
70 /** Called when the job coroutine yields or terminates */
71 Notifier idle_notifier
;
73 /** BlockDriverStates that are involved in this block job */
78 * Global state (GS) API. These functions run under the BQL.
80 * See include/block/block-global-state.h for more information about
86 * @job: A block job, or %NULL.
88 * Get the next element from the list of block jobs after @job, or the
89 * first one if @job is %NULL.
91 * Returns the requested job, or %NULL if there are no more jobs left.
93 BlockJob
*block_job_next(BlockJob
*job
);
97 * @id: The id of the block job.
99 * Get the block job identified by @id (which must not be %NULL).
101 * Returns the requested job, or %NULL if it doesn't exist.
103 BlockJob
*block_job_get(const char *id
);
106 * block_job_add_bdrv:
108 * @name: The name to assign to the new BdrvChild
109 * @bs: A BlockDriverState that is involved in @job
110 * @perm, @shared_perm: Permissions to request on the node
112 * Add @bs to the list of BlockDriverState that are involved in
113 * @job. This means that all operations will be blocked on @bs while
116 int block_job_add_bdrv(BlockJob
*job
, const char *name
, BlockDriverState
*bs
,
117 uint64_t perm
, uint64_t shared_perm
, Error
**errp
);
120 * block_job_remove_all_bdrv:
121 * @job: The block job
123 * Remove all BlockDriverStates from the list of nodes that are involved in the
124 * job. This removes the blockers added with block_job_add_bdrv().
126 void block_job_remove_all_bdrv(BlockJob
*job
);
129 * block_job_has_bdrv:
130 * @job: The block job
132 * Searches for @bs in the list of nodes that are involved in the
135 bool block_job_has_bdrv(BlockJob
*job
, BlockDriverState
*bs
);
138 * block_job_set_speed:
139 * @job: The job to set the speed for.
140 * @speed: The new value
141 * @errp: Error object.
143 * Set a rate-limiting parameter for the job; the actual meaning may
144 * vary depending on the job type.
146 bool block_job_set_speed(BlockJob
*job
, int64_t speed
, Error
**errp
);
150 * @job: The job to get information about.
152 * Return information about a job.
154 BlockJobInfo
*block_job_query(BlockJob
*job
, Error
**errp
);
157 * block_job_iostatus_reset:
158 * @job: The job whose I/O status should be reset.
160 * Reset I/O status on @job and on BlockDriverState objects it uses,
161 * other than job->blk.
163 void block_job_iostatus_reset(BlockJob
*job
);
166 * block_job_get_aio_context:
168 * Returns aio context associated with a block job.
170 AioContext
*block_job_get_aio_context(BlockJob
*job
);
174 * Common functions that are neither I/O nor Global State.
176 * See include/block/block-common.h for more information about
181 * block_job_is_internal:
182 * @job: The job to determine if it is user-visible or not.
184 * Returns true if the job should not be visible to the management layer.
186 bool block_job_is_internal(BlockJob
*job
);
191 * Returns the driver associated with a block job.
193 const BlockJobDriver
*block_job_driver(BlockJob
*job
);