[Qemu-block] [PATCH v4 03/11] blockjob: Add block_job_get()

[Alberto Garcia]

Currently the way to look for a specific block job is to iterate the
list manually using block_job_next().

Since we want to be able to identify a job primarily by its ID it
makes sense to have a function that does just that.

Signed-off-by: Alberto Garcia <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Reviewed-by: Kevin Wolf <address@hidden>
---
 blockjob.c               | 13 +++++++++++++
 include/block/blockjob.h | 10 ++++++++++
 2 files changed, 23 insertions(+)

diff --git a/blockjob.c b/blockjob.c
index ce0e27c..ca2291b 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -60,6 +60,19 @@ BlockJob *block_job_next(BlockJob *job)
     return QLIST_NEXT(job, job_list);
 }
 
+BlockJob *block_job_get(const char *id)
+{
+    BlockJob *job;
+
+    QLIST_FOREACH(job, &block_jobs, job_list) {
+        if (!strcmp(id, job->id)) {
+            return job;
+        }
+    }
+
+    return NULL;
+}
+
 /* Normally the job runs in its BlockBackend's AioContext.  The exception is
  * block_job_defer_to_main_loop() where it runs in the QEMU main loop.  Code
  * that supports both cases uses this helper function.
diff --git a/include/block/blockjob.h b/include/block/blockjob.h
index 5181514..0fe1540 100644
--- a/include/block/blockjob.h
+++ b/include/block/blockjob.h
@@ -211,6 +211,16 @@ struct BlockJob {
 BlockJob *block_job_next(BlockJob *job);
 
 /**
+ * block_job_get:
+ * @id: The id of the block job.
+ *
+ * Get the block job identified by @id (which must not be %NULL).
+ *
+ * Returns the requested job, or %NULL if it doesn't exist.
+ */
+BlockJob *block_job_get(const char *id);
+
+/**
  * block_job_create:
  * @job_type: The class object for the newly-created job.
  * @bs: The block
-- 
2.8.1