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qmp: add block-job-pause and block-job-resume

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Add QMP commands matching the functionality.

Paused jobs cannot be canceled without first resuming them.  This
ensures that I/O errors are never missed by management.  However, an
optional force argument can be specified to allow that.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2012-09-28 17:22:51 +02:00 • committed by Kevin Wolf
parent 8acc72a4d2
commit 6e37fb811a
7 changed files with 150 additions and 11 deletions
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41
blockdev.c
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@ -1213,7 +1213,29 @@ void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
block_job_set_speed(job, speed, errp);
}
void qmp_block_job_cancel(const char *device, Error **errp)
void qmp_block_job_cancel(const char *device,
bool has_force, bool force, Error **errp)
{
BlockJob *job = find_block_job(device);
if (!has_force) {
force = false;
}
if (!job) {
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
return;
}
if (job->paused && !force) {
error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
return;
}
trace_qmp_block_job_cancel(job);
block_job_cancel(job);
}
void qmp_block_job_pause(const char *device, Error **errp)
{
BlockJob *job = find_block_job(device);
@ -1221,13 +1243,22 @@ void qmp_block_job_cancel(const char *device, Error **errp)
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
return;
}
if (job->paused) {
error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
trace_qmp_block_job_pause(job);
block_job_pause(job);
}
void qmp_block_job_resume(const char *device, Error **errp)
{
BlockJob *job = find_block_job(device);
if (!job) {
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
return;
}
trace_qmp_block_job_cancel(job);
block_job_cancel(job);
trace_qmp_block_job_resume(job);
block_job_resume(job);
}
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)