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job: Add error message for failing jobs

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So far we relied on job->ret and strerror() to produce an error message
for failed jobs. Not surprisingly, this tends to result in completely
useless messages.

This adds a Job.error field that can contain an error string for a
failing job, and a parameter to job_completed() that sets the field. As
a default, if NULL is passed, we continue to use strerror(job->ret).

All existing callers are changed to pass NULL. They can be improved in
separate patches.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Kevin Wolf 2018-05-24 15:26:10 +02:00
parent 4a5f2779ba
commit 1266c9b9f5
10 changed files with 29 additions and 17 deletions
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2
tests/test-bdrv-drain.c
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@ -498,7 +498,7 @@ typedef struct TestBlockJob {
static void test_job_completed(Job *job, void *opaque)
{
job_completed(job, 0);
job_completed(job, 0, NULL);
}
static void coroutine_fn test_job_start(void *opaque)