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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.c
parent470c05047a09cda3de16bb3f98a130d9537357a4 (diff)
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.c')
-rw-r--r--block.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/block.c b/block.c
index edfab49e32..2baac952f1 100644
--- a/block.c
+++ b/block.c
@@ -3858,3 +3858,51 @@ out:
return ret;
}
+
+void *block_job_create(const BlockJobType *job_type, BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ BlockJob *job;
+
+ if (bs->job || bdrv_in_use(bs)) {
+ return NULL;
+ }
+ bdrv_set_in_use(bs, 1);
+
+ job = g_malloc0(job_type->instance_size);
+ job->job_type = job_type;
+ job->bs = bs;
+ job->cb = cb;
+ job->opaque = opaque;
+ bs->job = job;
+ return job;
+}
+
+void block_job_complete(BlockJob *job, int ret)
+{
+ BlockDriverState *bs = job->bs;
+
+ assert(bs->job == job);
+ job->cb(job->opaque, ret);
+ bs->job = NULL;
+ g_free(job);
+ bdrv_set_in_use(bs, 0);
+}
+
+int block_job_set_speed(BlockJob *job, int64_t value)
+{
+ if (!job->job_type->set_speed) {
+ return -ENOTSUP;
+ }
+ return job->job_type->set_speed(job, value);
+}
+
+void block_job_cancel(BlockJob *job)
+{
+ job->cancelled = true;
+}
+
+bool block_job_is_cancelled(BlockJob *job)
+{
+ return job->cancelled;
+}