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authorStefan Hajnoczi <stefanha@linux.vnet.ibm.com>2012-01-18 14:40:43 +0000
committerKevin Wolf <kwolf@redhat.com>2012-01-26 11:45:26 +0100
commiteeec61f291399115ba757421fd631e3414726f6f (patch)
tree416a2c58e0bee11ef3b73849e6bf3807614591ad /block_int.h
parent470c05047a09cda3de16bb3f98a130d9537357a4 (diff)
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block: add BlockJob interface for long-running operations
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block_int.h')
-rw-r--r--block_int.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h
index 07d67ed..3566acb 100644
--- a/block_int.h
+++ b/block_int.h
@@ -69,6 +69,36 @@ typedef struct BlockIOBaseValue {
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;
@@ -264,6 +294,9 @@ struct BlockDriverState {
void *private;
QLIST_HEAD(, BdrvTrackedRequest) tracked_requests;
+
+ /* long-running background operation */
+ BlockJob *job;
};
struct BlockDriverAIOCB {
@@ -287,4 +320,11 @@ void bdrv_set_io_limits(BlockDriverState *bs,
int is_windows_drive(const char *filename);
#endif
+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);
+
#endif /* BLOCK_INT_H */